There is one pin on the end of the camshaft. The

TIMING CHAIN, REPLACE Caution: With the timing chain removed, avoid turning the camshaft or crankshaft. If movement is required, exercise extreme caution to avoid valve damage caused by piston contact. 1. Disconnect and isolate battery ground cable. 2. Drain coolant into suitable container. 3. Remove accessory drive belt. 4. Remove front cover as follows: a. Remove coolant reservoir or surge tank. b. Attach engine support tool Nos. J-28467-360 and J-28467-400, or equivalents, onto alternator stud-ended bolt. c. Remove front cover upper mounting screws. d. Remove engine mount and bracket adapter. Discard adapter bolts. e. Raise and support vehicle with jack stands. f. Remove righthand front wheel and tire assembly, then the righthand splash shield. g. Hold balancer in position using harmonic balancer GM tool No. J-38122, or equivalent, remove mounting bolt and balancer using puller GM tool No. J-24420-C, or equivalent. h. Remove front cover lower mounting bolt. i. Lower vehicle. j. Remove front cover and gaskets. 5. Rotate crankshaft in clockwise direction until camshaft sprocket timing dowel pin holes line up with timing chain housing holes, Fig. 1. 6. Remove timing chain guides. 7. Raise and support vehicle with jack stands. 8. Ensure timing chain slack is above tensioner, then remove tensioner, Fig. 2. 9. Disconnect timing chain from tensioner shoe grooves and remove shoe using suitable screwdriver under timing chain while pulling shoe outward. 10. If removing tensioner shoe is difficult, proceed as follows: a. Lower vehicle. b. Hold intake camshaft sprocket in position with camshaft sprocket wrench GM tool No. J-39579, or equivalent. c. Remove sprocket bolt and washer. d. Remove washer and install bolt into camshaft by hand. e. Position suitable three-jaw puller into intake camshaft sprocket relief holes and remove sprocket. Do not pry on camshaft sprocket as damage to sprocket or timing chain housing may result. 11. Remove mounting bolts and tensioner. Caution: Tensioner is spring loaded. 12. Mark timing chain and crankshaft sprocket for installation. 13. Remove timing chain. 14. Apply adhesive sealant compound GM part No. 12345493, or equivalent, on camshaft sprocket bolt. 15. Hold camshaft sprocket in position with camshaft sprocket GM tool No. J-39579, or equivalent, then tighten mounting bolt and washer. 16. Position camshafts using camshaft sprocket timing alignment pin tools No. J-36800, or equivalent, through camshaft sprockets' into timing chain housing holes, Fig. 1. 17. If camshafts are out of position and must be rotated more than 1/8 turn, proceed as follows: a. Rotate crankshaft clockwise to 90° off TDC. b. Position camshafts and install dowels. c. Rotate crankshaft counterclockwise back to TDC. Caution: Rotating crankshaft clockwise to TDC will damage valves and pistons. 18. Place timing chain over exhaust camshaft sprocket, coolant pump or idler sprocket and crankshaft sprocket. 19. Remove intake camshaft timing pin and attach camshaft sprocket GM tool No. J-39579, or equivalent. 20. Rotate intake camshaft sprocket counterclockwise with tool until timing chain can be installed over sprocket. 21. Release tool. Timing chain tension between camshaft sprockets should tighten. 22. Timing pin should easily fit through intake camshaft sprocket timing hole into timing chain housing timing hole. If timing pin does not fit easily, repeat procedure. 23. With timing pins installed, raise and support vehicle with jack stands. 24. With timing chain slack between intake camshaft sprocket and crankshaft sprocket, timing marks on crankshaft and engine block should be aligned. If crankshaft timing marks are not aligned, move timing chain one tooth forward or rearward to remove slack, then align marks. 25. Load tensioner to zero position by forming keeper out of heavy gauge wire. 26. Apply slight force on tensioner blade to compress plunger. 27. Insert small screwdriver into reset access hole and pry ratchet pawl away from ratchet teeth while forcing plunger completely in hole. 28. Install keeper between access hole and blade. 29. Install tensioner to chain housing and inspect plunger installation again. Ensure long end is toward crankshaft. 30. Lower vehicle enough to remove alignment dowel pins. 31. Rotate crankshaft two revolutions clockwise. 32. Align crankshaft keyway with cylinder block alignment mark and insert timing pins through camshaft sprockets into timing chain housing timing holes. 33. Timing pins should slide easily through timing holes. If timing pins cannot be easily inserted, repeat procedure to properly time engine. 34. Install timing chain guides and front cover. Torque front cover bolts to 108 inch lbs. 35. Torque engine mount bracket adapter bolts to 81 ft. lbs., then tighten an additional 90° turn. 36. Install accessory drive belt. 37. Inspect cooling system and fill to proper level with recommended coolant, as required. 38. Fill engine crankcase to proper level with recommended engine oil. 39. Connect battery ground cable. 40. Start engine and confirm proper operation, and ensure there are no leaks. 41. Clear DTC(s) using a suitably programmed scan tool. 42. These engines do not require a specified bleed procedure. After filling cooling system, run engine to operating temperature with radiator/pressure cap off. Air will then be automatically bled through opening. Hope that helps.

please let me know if you have questions.
2.4L Engine
NOTE It is recommended that the entire procedure be reviewed before attempting to service the timing chain.

1. Before servicing the vehicle, refer to the precautions section.
2. Drain the cooling system.
3. Remove or disconnect the following: Negative battery cable, Coolant surge tank, Accessory drive belt, Alternator
4. Install an engine support.
5. Remove or disconnect the following: Upper cover fasteners, Front cover vent hose, Right engine mount and bracket, Right front wheel, Right lower splash shield, Crankshaft balancer, Lower cover fasteners, Front cover
6. Rotate the crankshaft clockwise, as viewed from front of engine (normal rotation) until the camshaft sprocket's timing dowel pin holes align with the timing chain housing holes. The crankshaft sprocket mark should align with the engine mark. The crankshaft sprocket keyway should point upward and align with the cylinder bores centerline. This is the normal timed position.
7. Remove the timing chain guides.
8. Remove the timing chain tensioner.
   NOTE Be sure all the slack in the timing chain is above the tensioner assembly when removing it. CAUTION The tensioner plunger is spring loaded and could fly out causing personal injury.
9. Remove or disconnect the following: Timing chain, Camshaft sprockets

To install:

1. Install or connect the following: Camshaft sprockets. Torque the bolts to 52 ft. lbs. (70 Nm),
   Camshaft sprocket alignment pin through the camshaft sprockets holes into the timing chain housing holes to position the camshafts for timing.
2. If the camshafts are out of position and must be rotated more than 1 / 8 turn in order to install the alignment dowel pins, perform the following:
   1. Rotated the crankshaft 90 degrees clockwise off Top Dead Center (TDC) in order to give the valves adequate clearance to open.
   2. Once the camshafts are positioned and the dowels installed, rotate the crankshaft counterclockwise back to TDC.
      WARNING Do not rotate the crankshaft clockwise to TDC or valve and piston damage may occur.
      
3. Install the timing chain over the exhaust camshaft sprocket, around the idler sprocket and around the crankshaft sprocket.
   

   Fig. Timing chain and sprocket alignment positions-2.4L DOHC engine
   

4. Remove the alignment dowel pin from the intake camshaft. Using a dowel pin remover tool, rotate the intake camshaft sprocket counterclockwise enough to slide the timing chain over the intake camshaft sprocket. Release the camshaft sprocket wrench. The length of chain between the 2 camshaft sprockets will tighten.
   NOTE If properly timed, the intake camshaft alignment dowel pin should slide in easily. If the dowel pin does not fully index, the camshafts are not timed correctly and the procedure must be repeated.
5. Leave the alignment dowel pins installed.
6. With slack removed from chain between intake camshaft sprocket and crankshaft sprocket, the timing marks on the crankshaft and the cylinder block should be aligned. If marks are not aligned, move the chain 1 tooth forward or rearward, remove slack and recheck the marks.
7. Tighten the chain housing to engine stud. The stud is installed under the timing chain. Torque it to 19 ft. lbs. (26 Nm).
8. Reload the timing chain tensioner as follows:
   1. Form a keeper from heavy gauge wire.
   2. Slightly, compress the shoe plunger and insert a small screwdriver into the access hole.
   3. Release the ratchet pawl and compress the plunger completely into the hole.
   4. Insert the keeper between the access hole and the blade.
9. Install or connect the following:
   Tensioner assembly to the chain housing. Torque the bolts to 89 inch lbs. (10 Nm). Tensioner shoe and retainer. Torque the bolts to 89 inch lbs. (10 Nm). NOTE Recheck plunger assembly installation. It is correctly installed when the long end is toward the crankshaft.
10. Remove the alignment dowel pins. Rotate crankshaft clockwise 2 full rotations. Align the crankshaft timing mark with mark on cylinder block and reinstall alignment dowel pins. Alignment dowel pins will slide in easily if engine is timed correctly.
    WARNING If the engine is not correctly timed, severe engine damage could occur.
11. Install or connect the following: Timing chain guides, New seal into the front cover by lubricating the seal lip and tapping it into place, Front cover and gaskets. Torque the nuts and bolts to 106 inch lbs. (12 Nm), Crankshaft balancer. Torque the bolt to 129 ft. lbs. (175 Nm), Right front lower splash shield, Front wheel. Torque the nuts to 100 ft. lbs. (140 Nm), Right engine mount bracket. Torque the bolts to 81 ft. lbs. (110 Nm) plus an additional 90 degree turn, Right engine mount. Torque the bolt to 49 ft. lbs. (60 Nm), Upper cover vent hose
12. Remove the engine support.
13. Install or connect the following: Alternator. Torque the bolts to 37 ft. lbs. (50 Nm), Accessory drive belt, Coolant surge tank, Negative battery cable.
    
14. Refill the cooling system.
15. Start the engine and check for leaks.

chain. R&R instructions from autozone.com pasted below. let me know if you have any more questions.

REMOVAL & INSTALLATION
SOHC Engine See Figures 1, 2, 3 and 4

1. Disconnect the negative battery cable.
2. Remove the timing chain front cover.

During timing chain and sprocket removal, position the crankshaft 90 degrees past Top Dead Center (TDC), to make sure the pistons will not contact the valves upon assembly.

1. Carefully rotate the crankshaft clockwise so the timing mark on the crankshaft sprocket and keyway align with the main bearing cap split line (90 degrees past TDC).
2. Remove bolts, then remove the timing guides and tensioner.
3. Remove the camshaft sprocket bolt, using a 7 / 8 in. (21mm) wrench to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove the crankshaft sprocket, if necessary.

To install:

1. Inspect the chain for wear and damage. Check the inside diameter of the chain, it should be no more than 16.77 in. (426mm). Inspect the chain guides for wear or cracks and the timing sprockets for teeth or key wear. Replace components as necessary.
2. Verify that the crankshaft is positioned 90 degrees clockwise past TDC from the keyway (keyway at 3 o'clock).
3. Bring the camshaft up to No. 1 TDC by loosely installing the sprocket and rotating the sprocket until the timing pin can be inserted. The camshaft contains wrench flats to assist in turning the shaft. The dowel pin should be at 12 o'clock when the camshaft is at TDC and a timing pin ( 3 / 16 in. drill bit) should then install at about the 8 o'clock position.
4. If removed, install the crankshaft sprocket, then rotate the crankshaft counterclockwise 90 degrees up to No. 1 TDC (keyway at 12 o'clock).
5. Position the chain under the crankshaft sprocket and over the camshaft sprocket. If necessary remove the camshaft sprocket, then slide the camshaft sprocket into position with the chain already engaged. The timing chain should be positioned so that one silver link plate aligns with the reference mark on the camshaft sprocket and the other aligns with the downward tooth (at the 6 o'clock position) on the crankshaft sprocket. The letters FRT on the camshaft sprocket must face forward, away from the cylinder head and excess chain slack should be located on the tensioner side of the block.
6. Temporarily install the timing pin to verify proper alignment of the camshaft and sprocket, then install and tighten the sprocket bolt to 75 ft. lbs. (102 Nm). Again, use a wrench on the camshaft flats to hold the shaft in position while tightening the bolt. Do not allow the camshaft retaining bolt to torque against the timing pin or cylinder head damage will result.
7. Install the chain guides with the words FRONT facing out. Install the fixed guide first and verify the chain is snug against the guide, then install the pivot guide. Tighten the bolts to 19 ft. lbs. (26 Nm) and verify that the pivot guide moves freely.
8. Retract the tensioner plunger and pin the ratchet lever using a 1 / 8 in. No. 31 drill bit inserted in the alignment hole at the bottom front of the component. Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove the drill bit.
9. Make one final check to verify all components are properly timed, then remove all timing pins.
10. Install the timing chain front cover.
11. Connect the negative battery cable, start the engine and check for leaks.
    

Fig. Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing mark and keyway will align with the main bearing cap split line

Fig. Fig. 2: Exploded view of the timing chain and sprocket assembly-SOHC engine

Fig. Fig. 3: Insert the timing pin to ensure that the camshaft is at No. 1 TDC-SOHC engine

Fig. Fig. 4: When the camshaft is at TDC, rotate the crankshaft counterclockwise 90 degrees to achieve TDC

Timing Chain and Sprockets
REMOVAL & INSTALLATION

1. 
   
   
   
   Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing
   mark and keyway will align with the main bearing cap split line
   
   
   
   
   
   
   
   Fig. 2: Exploded view of the timing chain and sprocket
   assembly - SOHC engine
   
   
   
   
   
   
   
   Fig. 3: Insert the timing pin to ensure that the camshaft is at
   No. 1 TDC - SOHC engine
   
   
   
   
   
   
   
   Fig. 4: When the camshaft is at TDC, rotate the crankshaft
   counterclockwise 90 degrees to achieve TDC
   
   

DOHC Engine

1. Disconnect the negative battery cable.
   
2. Remove the timing chain front cover.
   NOTE: During timing chain and sprocket removal, position the
   crankshaft 90 degrees past Top Dead Center (TDC) to make sure the pistons will
   not contact the valves upon assembly.
   
   
   
3. Carefully rotate the crankshaft clockwise so the timing mark on the
   crankshaft sprocket and keyway align with the main bearing cap split line.
   
4. Remove the bolts, then remove the timing guides and tensioner.
   
5. Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
   to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove
   the crankshaft sprocket, if necessary.
   To install:
   
   
6. Inspect the chain for wear and damage. Check the inside diameter of the
   chain, it should be no more than 23.15 in. (588mm). Inspect the chain guides for
   wear or cracks and the timing sprockets for teeth or key wear. Replace
   components as necessary.
   
7. Verify that the crankshaft is positioned 90 degrees clockwise past TDC. The
   crankshaft keyway should be at 3 o'clock aligned with the main bearing cap split
   line to prevent piston and valve damage.
   
8. Install the camshaft sprockets, retaining bolts and washers. Make sure the
   letters FRT on the sprockets face forward, away from the cylinder block. Use the
   wrench flats provided on the camshafts to hold the shaft and tighten the bolts
   to 75 ft. lbs. (102 Nm).
   
9. Bring the camshafts up to No. 1 TDC by rotating the camshafts and sprocket
   until the dowel pins are at 12 o'clock. Install a 1?6 in. drill bit
   into the hole in the sprocket about 9 o'clock.
   
10. If removed, install the crankshaft sprocket, then rotate the crankshaft
    counterclockwise 90 degree up to No. 1 TDC (keyway and sprocket timing mark at
    12 o'clock, in alignment with the block timing mark).
    
11. Position the timing chain under the crankshaft sprocket and over the
    camshaft sprockets so 2 silver link plates align with the reference marks on the
    camshaft sprockets and another 2 plates align with the downward tooth (at 6
    o'clock position) on the crankshaft sprocket. Excess chain slack should be
    located on the tensioner side of the cylinder block.
    
12. Verify that the crankshaft reference mark aligns with the cylinder block
    mark at 12 o'clock and that the timing pins are installed in the holes at about
    the 9 o'clock position. Remove the timing pins from the camshaft sprockets.
    
13. Install the timing chain fixed guide to the right of the block face toward
    the water pump. Tighten the bolts to 21 ft. lbs. (28 Nm) and verify the chain is
    snug against the guide.
    
14. Install the pivoting chain guide and check for clearance between the block
    and head. Tighten the bolt to 19 ft. lbs. (26 Nm) and verify the guide pivots
    freely.
    
15. Install the 2 forward camshaft bearing caps and the upper timing chain
    guide, then tighten the retaining bolts to 124 inch lbs. (14 Nm).
    
16. Retract the tensioner plunger and pin the ratchet lever using a 1?8 in. (3.18mm) No.
    31 drill bit inserted in the alignment hole at the lower front of the component.
    Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove
    the drill bit.
    
17. Make one final check to verify all components are properly timed, then
    remove all timing pins.
    
18. Install the timing chain front cover.
    
19. Connect the negative battery cable, start the engine and check for leaks.
    
    
    
    
    
    Fig. 5: Rotate the crankshaft clockwise until the timing mark
    on the crankshaft sprocket and keyway align with the main bearing cap split line
    
    
    
    
    
    
    
    
    Fig. 6: Loosen the timing chain tensioner mounting bolt . . .
    
    
    
    
    
    
    
    Fig. 7: . . . and remove the tensioner from the engine block
    
    
    
    
    
    
    
    Fig. 8: Retract the tensioner plunger and pin the ratchet lever
    with a 1?8
    in. (3.18mm) drill bit inserted in the alignment hole
    
    
    
    
    
    
    
    Fig. 9: Remove the mounting fasteners from both timing guides .
    . .
    
    
    
    
    
    
    
    Fig. 10: . . . and remove the timing guides from the engine
    
    
    
    
    
    
    
    Fig. 11: Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
    to hold the camshaft
    
    
    
    
    
    
    
    Fig. 12: Remove the timing chain and camshaft sprockets
    
    
    
    
    
    
    
    Fig. 13: Insert the timing pins to verify that the camshafts
    are at TDC
    
    
    
    
    
    
    
    Fig. 14: Make sure that the silver link plates and reference
    marks are all in alignment as shown
    
    

To Install:

1. Install balance shaft drive gear onto the left camshaft.
2. Install the camshaft sprockets and new bolts finger tight.
3. Using a vise, compress the timing chain tensioner plunger.

4. Install a retaining clip on the tensioner to hold plunger IN during installation.
   marking timing chain
   

5. If timing chain copper links are not visible, mark 2 links on one end and 1 link on the other end to be used as timing marks.
6. Install right and left timing chain guides. Tighten bolts to 89 in-lbs (10 Nm).
7. Rotate the left camshaft until the timing mark is at the 12 o'clock position.
8. Rotate the right camshaft until the timing mark is at the 11 o'clock position.

9. Position the crankshaft using the special tool. Then remove the tool.
   Crankshaft special tool positioning
   

10. Install the crankshaft sprocket with flange facing forward.
    Crankshaft sprocket timing mark
    

11. Position lower end of left (inner) timing chain on the crankshaft sprocket. Align the copper (or marked) chain link with the timing mark on the outer flange of the crankshaft pulley. NOTE: Upper half of timing chain must be below the tensioner arm dowel.
    

12. Position the left timing chain on the camshaft sprocket. The timing mark on the camshaft sprocket must be aligned between the 2 copper (or marked) chain links.
    Left camshaft sprocket timing mark
    

13. Place the left timing chain tensioner arm on the dowel pin and install the timing chain tensioner and bolts. Tighten bolts to 18 ft-lbs (25 Nm). NOTE: Lower half of timing chain must be above the tensioner arm dowel.
    Crankshaft sprocket timing mark
    

14. Position lower end of right (outer) timing chain on the crankshaft sprocket. Align the copper (or marked) chain link with the timing mark on the outer flange of the crankshaft pulley.
    Right camshaft sprocket timing mark
    

15. Position the right timing chain on the camshaft sprocket. The timing mark on the camshaft sprocket must be aligned between the 2 copper (or marked) chain links.
16. Place the right timing chain tensioner arm on the dowel pin and install the timing chain tensioner and bolts. Tighten bolts to 18 ft-lbs (25 Nm).
17. Remove the retaining clips from the right and left timing chain tensioners.
18. Verify alignment of all timing marks.
19. Install crankshaft sensor ring on crankshaft.
20. Locate index mark on balance shaft and mark corresponding gear tooth with chalk.
21. Position balance shaft on journals. NOTE: It may be helpful to use an inspection mirror to view the marks timing marks.
    

22. Align the chalk mark on the balance shaft with the camshaft timing mark.
    Balance shaft bearing caps
    

23. Install the balance shaft bearing caps in their original locations. Follow the tightening sequence as shown in the illustration. Tighten bolts to 89 in-lbs (10 Nm).
24. Tighten the camshaft phaser sprocket bolts in the correct sequence using 2 steps, as follows:
    • Step 1-30 ft-lbs (40 Nm)
    • Step 2-tighten an additional 90 degrees
25. Position the crankshaft keyway in the 11 o'clock position.
26. Lubricate and install all camshaft roller followers. WARNING
    Engine front cover replacement procedure must be completed within 4 minutes or entire procedure must be repeated. Failure to do so may result in future leaks
    

Timing Chain and Sprockets REMOVAL & INSTALLATION 2.3L and 2.4L Engines The following tools will be required to perform this procedure:

• Camshaft sprocket timing alignment pins - J 36008 or equivalent
• Camshaft sprocket wrench - J 39579 or equivalent

2. Fig. 1: View of the DOHC engine "timed position'' - 2.3L and 2.4L engines
   Fig. 2: View of the SOHC engine "timed position'' - 2.3L engine
   
3. Remove the timing chain guides. There are usually three.
4. Raise and safely support the front of the vehicle.
5. Make sure all of the slack is above the tensioner. Gently pry off timing chain tensioner spring retainer, then remove the spring. NOTE: On the 2.3L engine two styles of tensioners are used. Early production engines will have a spring post and late production ones will not. Both styles are identical in operation and are interchangeable.
   
6. Remove the timing chain tensioner shoe retainer.
7. Make sure all the slack in the timing chain is above the tensioner assembly; remove the chain tensioner shoe. The timing chain must be disengaged from the wear grooves in the tensioner shoe in order to remove the shoe. Slide a suitable small prybar under the timing chain while pulling shoe outward.
8. If difficulty is encountered while removing chain tensioner shoe, proceed as follows:
   1. Lower the vehicle.
   2. Hold the intake camshaft sprocket with a camshaft sprocket wrench - J 39579 or equivalent holding tool and remove the sprocket bolt and washer.
   3. Remove the washer from the bolt and re-thread the bolt back into the camshaft by hand. The bolt provides a surface to push against.
   4. Remove intake camshaft sprocket using a 3-jaw puller in the 3 relief holes in the sprocket. NOTE: Do NOT try to pry the sprocket off the camshaft or damage to the sprocket or chain housing could occur.
      
9. Unfasten the tensioner assembly attaching bolts, then remove the tensioner. CAUTION
   The tensioner piston is spring loaded and could fly out causing personal injury. Use care when removing.
   
10. Matchmark the timing chain outer surface for reassembly purposes.
11. If equipped, remove the chain housing to block stud, which is actually the timing chain tensioner shoe pivot.
12. Remove the timing chain.
13. Inspect the parts for wear, then replace if necessary. Some scoring of the timing chain shoe and guides is normal. Clean the old sealant off of the bolt with a wire brush. Clean the threaded hole in the camshaft with a round nylon bristle brush. To install: WARNING
    Failure to following installation procedures can result in severe engine damage.
    
14. Install the intake camshaft sprocket onto the camshaft with the marked surface showing. Install the sprocket retaining bolt and washer. Use an adhesive compound 12345493 or equivalent on the bolt. Tighten the bolt to 52 ft. lbs. (70 Nm), while holding the sprocket with tool J-36013, J 39579 or equivalent, if removed.
15. Install tool J 36800 or equivalent, through hole(s) in the camshaft sprocket(s) into the holes in the timing chain housing. This positions the camshafts for correct timing. Fig. 3: Placing the camshaft sprockets onto the marked surface of the camshaft
    
16. If the camshafts are out of position and must be rotated more than 1?8 turn in order to install the alignment dowel pins:
    1. The crankshaft must be rotated 90°clockwise off of TDC in order to give the valves adequate clearance to open.
    2. Once the camshafts are in position and the dowels installed, rotate the crankshaft COUNTERCLOCKWISE back to TDC. NOTE: Do NOT rotate the crankshaft clockwise to TDC, or valve and piston damage could occur. WARNING
       The side of the timing chain that was marked must be facing outward when installed.
       
17. For DOHC engines only, install the timing chain over the exhaust camshaft sprocket, around the idler sprocket and around the crankshaft sprocket.
18. Remove the alignment dowel pin from the intake (DOHC only) camshaft. Using dowel pin remover tool J 39579 or equivalent, rotate the intake (DOHC only) camshaft sprocket counterclockwise enough to slide the timing chain over the intake (DOHC only) camshaft sprocket. Release the camshaft sprocket wrench. The length of chain between the two camshaft sprockets will tighten. If properly timed, the intake camshaft alignment dowel pin should slide in easily. If the dowel pin does not fully index, the camshafts are not timed correctly and the procedure must be repeated. Fig. 4: Place the timing chain over the exhaust camshaft and around the idler sprocket and around the crankshaft sprocketDOHC engines
    
19. Leave the alignment dowel pins installed.
20. Raise and safely support the vehicle.
21. With slack removed from chain between intake camshaft sprocket (camshaft sprocket for SOHC engines) and crankshaft sprocket, the timing marks on the crankshaft and the cylinder block should be aligned. If marks are not aligned, move the chain one tooth forward or rearward, remove the slack and recheck the marks.
22. If equipped, tighten the chain housing to block stud. The stud is installed under the timing chain. Tighten to 19 ft. lbs. (26 Nm).
23. For vehicles through 1991, reload timing chain tensioner assembly to its "zero'' position as follows:
    1. Assemble restraint cylinder, spring and nylon plug into plunger. Index slot in restraint cylinder with peg in plunger. While rotating the restraint cylinder clockwise, push the restraint cylinder into the plunger until it bottoms. Keep rotating the restraint cylinder clockwise but allow the spring to push it out of the plunger. The pin in the plunger will lock the restraint in the loaded position.
    2. Install tool J-36589 or equivalent, onto plunger assembly.
    3. Install plunger assembly into tensioner body with the long end toward the crankshaft when installed.
24. For 1992-98 vehicles, reload timing chain tensioner assembly to its "zero'' position as follows:
    1. Form a keeper from a piece of heavy gauge wire. See the accompanying figure.
    2. Apply slight force on the tensioner blade to compress the plunger.
    3. Insert a small prybar into the reset access hole, then pry the racket pawl away from the ratchet teeth while forcing the plunger completely in the hole.
    4. Install the keeper between the access hole and the blade. Fig. 5: View of reloading the timing chain tensioner assembly to its "zero'' position - 1992-98 vehicles
       
25. Install the tensioner assembly to the chain housing. Recheck the plunger assembly installation. It is correctly installed when the long end is toward the crankshaft.
26. Install and tighten timing chain tensioner bolts. Tighten to 89 inch lbs. (10 Nm).
27. Install the tensioner shoe and tensioner shoe retainer. Remove the special tool J-36589, then squeeze the plunger assembly into the tensioner body to unload the plunger assembly.
28. Lower vehicle enough to reach and remove the alignment dowel pins.
29. Rotate crankshaft clockwise (normal rotation) two full rotations. Align the crankshaft keyway with the mark on the cylinder block, then reinstall the alignment dowel pins. The pins will slide in easily if the engine is timed correctly. WARNING
    If the engine is not correctly timed, severe engine damage could occur.
    
30. Install the timing chain guides and, if equipped, the crankshaft oil slinger.
31. Install the timing chain front cover. For details, please refer to the procedure located in this section.
32. Connect the negative battery cable, then start the engine and check for oil leaks.

Timing Belt Cover, Belt & Sprockets Removal & Installation 2.5L Engine To Remove:

1. Remove the drive belts.
2. Remove the A/C compressor drive belt tensioner. Timing belt & cover DOHC exploded view
   
   
3. Remove the crankshaft pulley.
4. Remove the mounting bolts and left timing belt cover.
5. Remove the mounting bolts and right timing belt cover.
6. Remove the mounting bolts and front timing belt cover.
7. Vehicles W/ M/T: Remove the timing belt guide.
8. Ensure that the timing belt rotation arrows are still visible. If the marks are worn off, place new rotation marks on the belt. Timing belt alignment marks DOHC
   
   
9. Turn the crankshaft using a breaker bar and special adapter socket on the crankshaft. Align the timing mark on the crankshaft sprocket (1), left intake sprocket (2), left exhaust sprocket (3), right intake sprocket (4) and right exhaust sprocket (5) with the notches in cylinder block and timing belt cover.
10. Paint alignment marks on the timing belt at the crankshaft and camshaft sprockets timing marks. CAUTION
    Do not turn the camshaft sprockets with the timing belt removed. The valves heads will contact each other causing the valve stems to bend.
    
11. Remove the lower right idler pulley.
12. Remove the timing belt.
13. Remove the upper right idler pulley.
14. Remove the lower left (toothed) idler pulley.
15. Remove the belt tensioner.
16. Hold the sprocket and remove the left intake and exhaust camshafts.
17. Hold the sprocket and remove the right intake and exhaust camshafts.
18. Remove the crankshaft sprocket.

To Install:

1. Install the crankshaft sprocket.
2. Hold the sprocket and install the right intake and exhaust camshafts with the mounting bolts. Tighten 58 ft-lb (78 Nm).
3. Hold the sprocket and install the left intake and exhaust camshafts with the mounting bolts. Tighten 58 ft-lb (78 Nm).
4. Reset the automatic belt tensioner as follows:
   • Remove the mounting bolt and belt tensioner. NOTE: Do not exceed more than 2,205 lb. (9,807 N).
     
   • Place the belt tensioner on a press. Press the adjuster rod down gradually (using more than 3 minutes) 66- lb (165 N) or more until the adjuster rod is aligned with the stop pin hole in the cylinder.
   • Insert a 0.08 in (2 mm) diameter pin or hex wrench into the pin hole to lock the adjuster rod.
   • Install the automatic belt tension adjuster with the mounting bolt. Tighten 18 ft-lb (25 Nm).
5. Install the lower left (toothed) idler pulley. Tighten 29 ft-lb (39 Nm).
6. Install the upper right idler pulley with the mounting bolt. Tighten 29 ft-lb (39 Nm). Crankshaft sprocket and oil pump cover alignment marks 2.5L DOHC
   
   
7. Align the timing mark on the crankshaft sprocket with the mark on the oil pump cover. Timing belt alignment marks DOHC
   
   
8. Align the single timing mark on the right exhaust camshaft sprocket with the notch on the timing belt cover.
9. When the single timing mark on the right exhaust camshaft sprocket is aligned with the notch on the timing belt cover, ensure that the double lines on the intake camshaft and exhaust camshaft sprockets are aligned.
10. Align the single timing mark on the left exhaust camshaft sprocket with the notch on the timing belt cover by turning the sprocket counter clockwise (viewed from front of engine).
11. Ensure that the double lines on the intake camshaft and exhaust camshaft sprockets are aligned when the single timing mark on the left exhaust camshaft sprocket is aligned with the notch on the timing belt cover. CAUTION
    • The camshafts can be rotated independently causing the valves heads to contact each other resulting in bent valve stems.
    • When the timing belt is removed the camshafts will turn to the lowest cam lobe position by the force of the valve springs. Before installing the timing belt the 4 camshafts are in the lowest lift position (valves closed).
    • When the camshafts are rotated to install the timing belts, # 2 intake and # 4 exhaust cam lobes of the left camshafts are held to push their corresponding valves down. In this position, these valves are held in the open position. Right camshafts are held so their cam lobes do not push the valves down.
    • The left camshafts must be rotated from the lowest lobe position to the position where the timing belt can be installed at the smallest possible angle in order to prevent intake and exhaust valve contact. Camshaft sprockets rotation
      
      
    • Do not turn the camshafts in the direction shown in the illustration because the valves will open at the same time and contact each other.
    CAUTION
    If the timing belt alignment is off the mark buy more than 3 teeth, the valves and pistons may have contact.
    Timing belt alignment marks DOHC
    
    
12. Align the timing marks on the belt with the marks on the sprockets in the numerical order shown in the illustration.
13. Install the lower right idler pulley with the mounting bolt. Tighten 29 ft-lb (39 Nm).
14. Ensure that the timing mark alignment is correct and remove the tensioner stop pin.
15. Vehicles W/ M/T: Install the timing belt guide and temporarily tighten the mounting bolts.
16. Vehicles W/ M/T: Measure the clearance between the guide and timing belt. The clearance should measure 0.039 ± 0.020 in (1.0 ± 0.5 mm).
17. Vehicles W/ M/T: Tighten the guide bolts 7.2 ft-lb (9.8 Nm).
18. Install and secure the front timing belt cover with the mounting bolts.
19. Install and secure the right timing belt cover with the mounting bolts.
20. Install and secure the left timing belt cover with the mounting bolts.
21. Install the crankshaft pulley.
22. Install the A/C compressor drive belt tensioner.
23. Install the drive belts.

Timing Belt Removal & Installation 3.0L Engine To Remove:
Exploded view of the timing belt and sprocket assembly (3.0L engine)

1. Disconnect the negative battery cable.
2. Remove the accessory drive belts. Remove the engine mount insulator from the engine support bracket.
3. Remove the engine support bracket. Remove the crankshaft pulleys and torsional damper. Remove the timing belt covers.
4. Rotate the crankshaft until the sprocket timing marks are aligned. The crankshaft sprocket timing mark should align with the oil pump timing mark. The rear camshaft sprocket timing mark should align with the generator bracket timing mark and the front camshaft sprocket timing mark should align with the inner timing belt cover timing mark.
5. If the belt is to be reused, mark the direction of rotation on the belt for installation reference. Mark the direction of travel for the timing belt for correct installation
   
6. Loosen the timing belt tensioner bolt and remove the timing belt.
7. If necessary, remove the timing belt tensioner. Turn the center tensioner pulley bolt until the timing belt has enough slack . . .
   . . . then slide the timing belt off of the camshaft sprockets
   
8. Remove the crankshaft sprocket flange shield and crankshaft sprocket.
9. Hold the camshaft sprocket using spanner tool MB990775 or equivalent, and remove the camshaft sprocket bolt and washer. Remove the camshaft sprocket.

To Install:

1. Install the camshaft sprocket on the camshaft with the retaining bolt and washer. Hold the camshaft sprocket using spanner tool MB990775 or equivalent, and tighten the bolt to 70 ft. lbs. (95 Nm).
2. Install the crankshaft sprocket.
3. If removed, install the timing belt tensioner and tensioner spring. Hook the spring upper end to the water pump pin and the lower end to the tensioner bracket with the hook out.
4. Turn the timing belt tensioner counterclockwise full travel in the adjustment slot and tighten the bolt to temporarily hold it in this position.
5. Rotate the crankshaft sprocket until its timing mark is aligned with the oil pump timing mark.
6. Rotate the rear camshaft sprocket until its timing mark is aligned with the timing mark on the generator bracket.
7. Rotate the front (radiator side) camshaft sprocket until its mark is aligned with the timing mark on the inner timing belt cover.
8. Install the timing belt on the crankshaft sprocket while keeping the belt tight on the tension side. NOTE: If the original belt is being reused, be sure to install it in the same rotational direction.
   
9. Position the timing belt over the front camshaft sprocket (radiator side). Next, position the belt under the water pump pulley, then over the rear camshaft sprocket and finally over the tensioner. CAUTION
   If any binding is felt when adjusting the timing belt tension by turning the crankshaft, STOP turning the engine, because the pistons may be hitting the valves.
   Rent or borrow the special tool to hold the camshaft sprockets steady . . .
   . . . while loosening the center retaining bolt on the camshaft pulley, then . . .
   . . . remove the camshaft sprocket from the end of the camshaft
   Timing belt tensioner and spring positions
   Timing belt routing and timing mark locations
   
   
10. Apply rotating force in the opposite direction to the front camshaft sprocket (radiator side) to create tension on the timing belt tension side. Check that all timing marks are aligned.
11. Install the crankshaft sprocket flange.
12. Loosen the tensioner bolt and allow the tensioner spring to tension the belt.
13. Rotate the crankshaft two full turns in a clockwise direction. Turn the crankshaft smoothly and in a clockwise direction only.
14. Again line up the timing marks. If all marks are aligned, tighten the tensioner bolt to 250 in. lbs. (28 Nm). Otherwise repeat the installation procedure.
15. Install the timing belt covers. Install the engine support bracket. Tighten the support bracket mounting bolts to 35 ft. lbs. (47 Nm).
16. Install the engine mount insulator, torsional damper and crankshaft pulleys. Tighten the crankshaft pulley bolt to 112 ft. lbs. (151 Nm).
17. Install the accessory drive belts.
18. Reconnect the negative battery cable.
19. Run the engine and check for proper operation.

1. If tensioner assembly is being replaced, install tensioner and mounting bolts. Torque bolts to 28 Nm (250 in. lbs.) .
2. Retract tensioner if required. CAUTION: The camshaft pin and the slot in the cam sprocket must be clocked at 12:00. The crankshaft keyway must be clocked at 2:00. The crankshaft sprocket must be installed so that the dots and or paint marking is at 6:00.
3. Place both camshaft sprocket and crankshaft sprocket on the bench with timing marks on exact imaginary center line through both camshaft and crankshaft bores.

CAUTION: The timing chain must be installed with the single plated link aligned with the dot and or paint marking on the camshaft sprocket. The crankshaft sprocket is aligned with the dot and or paint marking on the sprocket between two plated timing chain links.

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SPECIAL TOOLS REQUIRED (or equivalents)

• J-36008, Camshaft sprocket timing alignment pins.
• J-39579, Camshaft sprocket wrench.

CAUTIONS:

• The timing chain on the 1996 LD9 (VIN T) Twin Cam Engine is not to be replaced with the timing chain from any other model year. The timing sprockets are different on the Twin Cam Engine and the shape of the links matches the sprockets. Engine damage may result if the wrong timing chain is used.
• The timing chain and crankshaft sprocket MUST be marked so that they are reinstalled with the same side facing out at the time of reassembly.
• Failure to follow the removal and installation procedures could result in severe engine damage.

REMOVE OR DISCONNECT

1. Negative battery cable.
2. Front cover, refer to Timing Cover / Service and Repair .
3. Rotate crankshaft in clockwise direction until camshaft and crankshaft timing marks are aligned.
4. Timing chain guides.
5. Raise and support vehicle.
6. Ensure slack in timing chain is above tensioner assembly, then remove chain tensioner. The timing chain must be disengaged from grooves in tensioner shoe to permit removal of shoe. Position a suitable screwdriver under timing chain while pulling shoe outward. If difficulty is encountered in removing tensioner shoe, proceed as follows:

1. Lower vehicle, then while holding the intake camshaft sprocket with J-39579, remove sprocket bolt and washer.
2. Remove washer, then install bolt into camshaft by hand.
3. Position a suitable three jaw puller into intake camshaft sprocket relief holes and remove sprocket. CAUTION: Do NOT pry on camshaft sprocket as damage to sprocket or timing chain housing may result.

1. Tensioner assembly attaching bolts and tensioner assembly.
2. MARK CRANKSHAFT SPROCKET AND TIMING CHAIN outer surface for reassembly.
3. Timing chain.

INSTALL OR CONNECT

1. Intake camshaft sprocket onto camshaft with surface marked during removal showing.
2. Intake camshaft sprocket retaining bolt and washer, torque to 70 Nm (52 ft lbs) while holding the sprocket with J-39579 (if removed).
3. Timing pins, J-36008, through holes in camshaft sprockets into holes in timing chain housing to position camshafts for proper timing. If camshafts are out of position and must be rotated more that 1/8 turn to insert timing pins:

1. Crankshaft MUST be rotated 90°clockwise off of TDC in order to give the valves adequate clearance to open.
2. Once the camshafts are in position and the timing pins have been installed rotate crankshaft COUNTERCLOCKWISE to TDC. CAUTION: Do NOT rotate the crankshaft clockwise to TDC, valve or piston damage could occur.

1. Timing chain over exhaust camshaft sprocket, around idler sprocket and around crankshaft sprocket.
2. Set camshaft sprockets at timed position and install timing chain. Remove timing pin from intake camshaft. Using J-39579, rotate the intake camshaft sprocket counterclockwise until timing chain can be installed over sprocket. Release J-39579 after timing chain has been installed over sprocket. The length of chain between intake and exhaust camshaft sprockets should tighten. The timing pin should easily fit through intake camshaft sprocket timing hole into timing chain housing timing hole. If timing pin does not fully index, the camshafts are NOT timed correctly and the procedure MUST be repeated.
3. With timing pins installed, raise and support vehicle.
4. With slack removed from timing chain between intake camshaft sprocket and crankshaft sprocket, timing marks on crankshaft and engine block should be aligned. If the marks are not aligned, move timing chain one tooth forward or rearward to align marks. Remove slack and recheck marks.
5. Reload tensioner assembly to zero position as follows:

1. Form a keeper out of heavy gauge wire into a U-shaped piece with a half inch opening.
2. Apply slight force on tensioner blade to compress plunger.
3. Insert small screwdriver into reset access hole and pry rachet pawl away from ratchet teeth while forcing the plunger completely in the hole.
4. Install keeper between access hole and blade.

1. Tensioner assembly to chain housing and recheck plunger assembly installation, noting long end is toward crankshaft.
2. Tighten timing chain tensioner bolts to 10 Nm (89 in lbs) .
3. Lower vehicle to point where timing pins can be removed from camshaft sprockets.
4. Rotate crankshaft two revolutions in the clockwise direction. Align crankshaft keyway with the mark on cylinder block and reinstall timing pins through camshaft sprockets into housing timing holes. Timing pins should slide easily through timing holes. If timing pins cannot be inserted easily, repeat procedure to properly time engine. CAUTION: If the engine is not correctly timed, severe engine damage could occur.
5. Timing chain guides.
6. Engine front cover.
7. Negative battery cable.