Question about GMC Sonoma

1 Answer

How to align camshaft to crankshaft when replacing timing chain on 4.3l gmc v6

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 2,428 Answers

Make sure you are on the compresstion stroke on # 1 cylinder its on the left side of the engine when the pistion is at the top of its stroke bolth valves on # 1 will be closed and won't open when the pistion is moveing up. Then look for the marks on the timing gears the cam faces down and the crank faces up they have to meat right on the money perfectly alinged and you should have now problems with timing issues

Posted on Dec 29, 2010

Testimonial: "thanks guru."

  • 1 more comment 
  • JOHN LAPIER Dec 29, 2010

    Why wasn't this helpful this is how its done i have the same engine and have done this many times If you can't follow what i said you should even attempt to work on this project. Pay someone else to do it

  • jwb7591 Dec 29, 2010

    Hey pal.... I am checking on this for a friend.It is just that at another site they said to put the engine on #4 cylinder compression stroke. If you are so smart tell me where the timing marks are and how to fix it when it throws the code P01345

  • JOHN LAPIER Dec 30, 2010

    Im back i'll give you that it is #4 i forgot most are #1 i do so many but i owen this one. And you should have said you had P1345 in the first place. The problem isn't the timing chain. Do you have a scan tool check the OBD powertrain performance if OK. Install scan tool start engine do the RPM fluctuate from 600 to 1200 at idle or twice at disired level of RPM. If so replace CKP. If not remove the distributor cap and try to turn the rotor if it turns you need to replace the distributor or rebuild it. To answer your question the way this system works is the hall effect sensor is split into two parts CMP and CKP are circuit 632 A 633 B for CMP and 573 C and 574 B correlates these two functions off of main power distribution cell 10 fuse #5 and #10 20 AMPS pnk 539 and pnk 439 lots of luck PAL

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Diagram timing of v6 engine of liberty 2001 model


2001 , no such ani-mule !
"Introduced for the 2002 model year as a replacement for the Cherokee (XJ),"
you meant manufactures date not model and reg. date. sure.
2002 !
3.7L V6 (cop spark ) chain drive cams....
timing ( cam or spark?)
"Ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is possible"
so Cam timing (alldata.com covers this in detail)
why not post the context, Im doing what.?
im doing a 60k belt swap
or it slipped. or think id did.
or just put in a new head or cam? see , context is 100% important.
im here, going to there.....
im on line, and it shows 4 engines, i think that is wrong, but...

you must be asking chain cam sprocket timing.
im at alldata.com (or FSM)
there are 37 install steps, im not sure what step you want me
to pluck out. but here is my guess. step 8 ,9,10
  1. Install both secondary chains onto the idler sprocket. Align two plated links on the secondary chains to be visible through the two lower openings on the idler sprocket (4 o'clock and 8 o'clock). Once the secondary timing chains are installed, position special tool 8429 to hold chains in place for installation.
  2. Align primary chain double plated links with the timing mark at 12 o'clock on the idler sprocket.
  3. Align the primary chain single plated link with the timing mark at 6 o'clock on the crankshaft sprocket.
step 12:
Install all chains, crankshaft sprocket, and idler sprocket as an assembly . After guiding both secondary chains through the block and cylinder head openings, affix chains with a elastic strap or equivalent. This will maintain tension on chains to aid in installation. Align the timing mark on the idler sprocket gear to the timing mark on the counterbalance shaft drive gear, then seat idler sprocket fully . Before installing idler sprocket bolt, lubricate washer with oil, and tighten idler sprocket assembly retaining bolt to 25 ft. lbs. (34 Nm).

step 13:
  1. Align left camshaft sprocket "L" dot to plated link on chain.
  2. Align right camshaft sprocket "R" dot to plated link on chain.

step 15/16
  1. Remove Special Tool 8429, then attach both sprockets to camshafts. Remove excess oil from bolts, then Install sprocket bolts, but do not tighten at this time.
  2. Verify that all plated links are aligned with the marks on all sprockets and the "V6" marks on camshaft sprockets are at the 12 o'clock position.

do ask questions, or login to alldata.com or mitchels
or get a real FSM.
its nothing trivial.

in fact get the book before the job. so are perpared.

Nov 30, 2013 | Jeep Liberty Cars & Trucks

1 Answer

Need the timing marks for a 2000 alero


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.
    jturcotte_2361.gifjturcotte_2362.gif

    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.

Oct 04, 2011 | Cars & Trucks

1 Answer

Timing chain replacement


Timing Chain and Gears REMOVAL & INSTALLATION 1.9L Engine NOTE: The following procedure requires the use of the puller tool No. J-25031 or equivalent, and timing sprocket installation tool No. J-26587 or equivalent.
  1. Remove the timing (front) cover from the engine.
  2. Lock the shoe on the automatic adjuster in fully retracted position by depressing the adjuster lock lever. NOTE: To remove the timing chain, it may be necessary to remove the camshaft sprocket. Before removing the timing chain, be sure to align the timing marks.
  3. Remove timing chain from crankshaft sprocket.
  4. Check the timing sprockets for wear or damage. If crankshaft sprocket must be replaced, remove the sprocket and the pinion gear from crankshaft using the puller tool No. J-25031 or equivalent.
  5. Check timing chain for wear or damage; replace as necessary. Measure distance "L'' (40 links) with the chain stretched with a pull of approximately 22 lbs. (98N). Standard "L'' value is 15 in. (381mm); replace chain if "L'' is greater than 15.16 in. (385mm).
  6. Remove the automatic chain adjuster-to-engine bolt and the adjuster.
  7. To check the operation of the automatic chain adjuster, push the shoe inwards, if it becomes locked, the adjuster is working properly. The adjuster assembly must be replaced if rack teeth are found to be worn excessively.
  8. To remove the chain tensioner, remove the "E'' clip and the tensioner. Check the tensioner for wear or damage; if necessary, replace it. Fig. 1: Timing chain guide and tensioner - 1.9L engine 85383285.gif

  9. Inspect the tensioner pin for wear or damage. If replacement is necessary, remove the pin from the cylinder block using a pair of locking pliers. Lubricate the NEW pin tensioner with clean engine oil. Start the pin into block, then place the tensioner over the appropriate pin. Position the E-clip onto the pin, then (using a hammer) tap it into the block until clip just clears tensioner. Check the tensioner and adjuster for freedom of rotation on the pins.
  10. Inspect the guide for wear or damage and plugged lower oil jet. If replacement or cleaning is necessary, remove the guide bolts, the guide and the oil jet. Install a new guide and upper attaching bolt. Install the lower oil jet and bolt, so that the oil port is pointed toward crankshaft. To install: Fig. 2: Timing chain alignment and installation - 1.9L engine 85383286.gif
    Fig. 3: Inspecting the timing chain for wear 85383287.gif

  11. Install the timing sprocket and the pinion gear (groove-side toward the front cover). Align the key groove with crankshaft key, then drive it into position using installation tool No. J-26587 or equivalent.
  12. Turn the crankshaft so that key is turned toward the cylinder head-side (No. 1 and No. 4 pistons at TDC).
  13. Install the timing chain, align the timing chain mark plate with the mark on the crankshaft timing sprocket. The side of the chain with the mark plate is on the front-side and the side of chain with the most links between mark plates is on the chain guide-side. Keep the timing chain engaged with the camshaft timing sprocket until the camshaft timing sprocket is installed on the camshaft.
  14. Install the camshaft timing sprocket so that it's marked-side faces forward and it's triangular mark aligns with the chain mark plate.
  15. Install the automatic chain adjuster.
  16. Release the lock by depressing the shoe on adjuster by hand, and check to make certain the chain is properly tensioned when the lock is released.
  17. Install the timing cover assembly.
prev.gif next.gif

Dec 12, 2010 | 1993 GMC Sonoma Club

1 Answer

How to set the timing on 1998 GMC Sierra 5.7


5.0L and 5.7L Engines To Remove:
  1. Remove the crankshaft balancer.
  2. Drain the cooling system.
  3. Remove the water pump.
  4. Drain the engine oil.
  5. Remove all engine oil pan fasteners except two nuts at rear of engine.
  6. Separate the engine oil pan from the front cover.
  7. Disconnect the crankshaft position (CKP) sensor wire. gm-03-50-845.gif

  8. Remove engine front cover. gm-03-50-849.gif

  9. Pry the oil seal from the front cover.
  10. Inspect the front cover seal area and crankshaft balancer seal area for damage. gm-03-50-846.gif

  11. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
  12. Remove the crankshaft position sensor reluctor ring. gm-03-50-847.gif

    NOTE: Free play on the slack side of the camshaft timing chain must measure less than 0.43 inch (11Mm) or timing chain and sprockets must be replaced.
  13. Remove the camshaft sprocket bolts.
  14. Remove the camshaft sprocket.
  15. Remove the camshaft timing chain. NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
    gm-03-50-848.gif

  16. Remove the crankshaft sprocket using J 5825-A.
  17. Remove the crankshaft balancer woodruff keys (if required).
To Install:
gm-03-50-850.gif

  1. Install the crankshaft balancer woodruff keys into the crankshaft.
  2. Align the crankshaft sprocket keyway with the crankshaft balancer woodruff key. WARNING
    Wear eye protection when installing crankshaft sprocket.
    gm-03-50-851.gif

  3. Use J 5590 to install crankshaft sprocket.
  4. Install the camshaft sprocket and camshaft timing chain. 9308kg61.gif

  5. Ensure that the crankshaft sprocket alignment mark is in the 12 o'clock position and the camshaft sprocket alignment mark is at the 6 o'clock position.
  6. Install the camshaft sprocket bolts and tighten the camshaft sprocket bolts;
    • Torque to: 18 ft. lbs. (25 Nm)
  7. Install the crankshaft position sensor reluctor ring until completely seated against crankshaft sprocket. NOTE: The composite type engine front cover and seal must not be reused. Always install a new engine cover with a new seal.
  8. Install new engine front cover and bolts.
    • Torque bolts to: 106 in. lbs. (12 Nm)
  9. Clean sealer from corners of oil pan gasket where it meets the engine front cover. gm-03-50-775.gif

  10. Apply a 0.196 in (5 mm) bead of adhesive, GM P/N 12346141 or equivalent, 1.0 in (25 mm) long to the engine front cover to engine block junction.
  11. Install oil pan bolts.
    • Torque bolts to: 106 in. lbs. (12 Nm)
  12. Tighten oil pan nuts.
    • Torque bolts to: 18 ft. lbs. (25 Nm)
  13. Connect the crankshaft position sensor wire.
  14. Install the water pump.
  15. Install the crankshaft balancer.
  16. Fill the engine to the proper level with oil.
  17. Fill the engine to the proper level with coolant.
  18. Test drive the vehicle to confirm the repairs.

Nov 05, 2010 | GMC K1500 Cars & Trucks

1 Answer

Dont no how to set the timming and what it suppose to be


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
    84193100.gif






    Fig. 2: Exploded view of the timing chain and sprocket
    assembly - SOHC engine
    84193101.gif






    Fig. 3: Insert the timing pin to ensure that the camshaft is at
    No. 1 TDC - SOHC engine
    84193102.gif






    Fig. 4: When the camshaft is at TDC, rotate the crankshaft
    counterclockwise 90 degrees to achieve TDC
    84193103.gif


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

    89563pb1.jpg






    Fig. 6: Loosen the timing chain tensioner mounting bolt . . .
    89563pb4.jpg






    Fig. 7: . . . and remove the tensioner from the engine block
    89563pb7.jpg






    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
    89563pb5.jpg






    Fig. 9: Remove the mounting fasteners from both timing guides .
    . .
    89563pb8.jpg






    Fig. 10: . . . and remove the timing guides from the engine
    89563pc1.jpg






    Fig. 11: Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
    to hold the camshaft
    89563pc2.jpg






    Fig. 12: Remove the timing chain and camshaft sprockets
    89563pc4.jpg






    Fig. 13: Insert the timing pins to verify that the camshafts
    are at TDC
    84193146.gif






    Fig. 14: Make sure that the silver link plates and reference
    marks are all in alignment as shown
    84193145.gif



prev.gif next.gif

Oct 07, 2010 | 1998 Saturn SL

1 Answer

2005 f250 5.4 gas need to know specs for timing a diagram would be awesome


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 a0038720.gif

  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 n0013602.gif

  10. Install the crankshaft sprocket with flange facing forward.
    Crankshaft sprocket timing mark n0011528.gif

  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 a0080774.gif

  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 a0079624.gif
  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 a0041104.gif

  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 n0007112.gif

  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

Oct 07, 2010 | Ford F-250 Cars & Trucks

1 Answer

How do i reset the timing in a 1997 z24 Chevrolet Cavalier 2.4 twin cam? Where are the timing marks on the cam gears?


2.3L and 2.4L Engines Before attempting to remove the timing chain, read the entire procedure.
  1. Disconnect the negative battery cable.
  2. Remove the timing chain front cover, as outlined earlier in this section.
  3. Rotate the crankshaft clockwise, as viewed from the front of engine/normal rotation, until the camshaft sprocket timing dowel pin holes line up with the holes in the timing chain housing. The crankshaft sprocket keyway should point upwards and line up with the centerline of the cylinder bores. This is the "timed'' position. Fig. 8: The chain must be in the "timed'' position - 2.3L and 2.4L engines 87953108.gif
    Fig. 9: Remove the timing chain guides 87953109.gif

  4. Remove the timing chain guides.
  5. Raise and safely support the vehicle.
  6. Make sure all of the slack in the timing chain is above the tensioner assembly, then remove the tensioner. The timing chain must be disengaged from any wear grooves in the tensioner shoe in order to remove the shoe. Slide a suitable prytool under the timing chain while pulling the shoe outward. WARNING
    Do NOT attempt to pry the socket off the camshaft or damage to the sprocket or chain housing could occur.
  7. If difficulty is encountered in removing the chain tensioner shoe, remove the intake camshaft sprocket, as follows;
    1. Carefully lower the vehicle.
    2. Hold the intake camshaft sprocket with a suitable tool and remove the sprocket bolt and washer.
    3. Remove the washer from the bolt and rethread the bolt back into the camshaft by hand. The bolt provides a surface to push against.
    4. Remove the camshaft sprocket using a three-jaw puller in the three relief holes in the sprocket.
  8. Unfasten the tensioner assembly retaining bolts, then remove the tensioner. NOTE: The timing chain and crankshaft sprocket MUST be marked before removal. If the chain or sprocket is installed with the wear pattern in the opposite direction, noise and increased wear may occur.
  9. Mark the crankshaft sprocket and timing chain outer surface for reassembly, then remove the chain.
  10. Clean the old sealant off the bolt with a wire brush. Clean the threaded hole in the camshaft with a round nylon brush. Inspect the parts for wear and replace as necessary. Note that some scoring of the chain shoe and guides is normal. To install: WARNING
    Failure to follow this procedure may result in severe engine damage.
  11. Position the intake camshaft sprocket onto the camshaft with the surface marked during removal showing.
  12. Install the intake camshaft sprocket retaining bolt and washer, tighten to 52 ft. lbs. (70 Nm) while holding the sprocket with a suitable tool. Use GM sealant 12345493 or equivalent on the camshaft sprocket bolt.
  13. Place GM tool J 36008, or equivalent camshaft aligning pins, through the holes in the camshaft sprockets into the holes in the timing chain housing. This positions the cams for correct timing.
  14. If the camshafts are out of position and must be rotated more than 1?8 turn in order to install the alignment dowel pins, proceed as follows:
    1. The crankshaft MUST be rotate 90°clockwise off of TDC in order to five the valves adequate clearance to open.
    2. Once the camshafts are in position and the dowels installed, rotate the crankshaft counter clockwise back to TDC. WARNING
      Do not rotate the crankshaft clockwise to TDC; valve or piston damage could result. NOTE: The side of the timing chain that was marked during removal must be showing when the chain is installed.

  15. Place the timing chain over the exhaust camshaft sprockets, around the idler sprocket and around the camshaft sprocket.
  16. Set the camshafts at the timed position and install the timing chain. Remove the alignment dowel pin from the intake camshaft. Using GM tool J 39579, rotate the intake camshaft sprocket counter clockwise enough to slide the timing chain over the intake camshaft sprocket. Release the camshaft sprocket wrench (J 39579 or equivalent). The length of the 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.
  17. Leave the alignment dowel pins installed. Raise and safely support the vehicle.
  18. With the slack removed from the chain between the intake camshaft sprocket and the crankshaft sprocket, the timing marks on the crankshaft and cylinder block should be aligned. If the marks are not aligned, move the chain one tooth forward or rearward, remove the slack and recheck the marks. Fig. 10: Timing chain assembly retaining bolts - 2.3L and 2.4L engines 87953111.gif

  19. Reload the timing chain tensioner assembly to its "zero'' position as follows:
    1. Form a keeper from a piece of heavy gauge wire, as shown in the accompanying figure.
    2. Apply slight force on the tensioner blade to compress the plunger.
    3. Insert a small prytool into the reset access hole, and pry the ratchet 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. 11: Reloading the tensioner to its "ZERO'' position, then install to the chain housing 87953110.gif

  20. Install the tensioner assembly to the timing chain housing. Recheck the plunger assembly installation, it is correctly installed when the long end is toward the crankshaft. Install the tensioner retaining bolts; tighten to 89 inch lbs. (10 Nm).
  21. Carefully lower the vehicle enough to reach and remove the alignment dowel pins. WARNING
    Severe engine damage could result if the engine is not properly timed.
  22. Rotate the crankshaft clockwise (normal rotation) two full rotations. Align the crankshaft keyway with the mark on the cylinder block and reinstall the alignment dowel pins. The pins will slide in easily if the engine is correctly timed.
  23. Install the timing chain guides, then install the front (timing chain) cover.
  24. Connect the negative battery cable.
prev.gif next.gif

Oct 02, 2010 | 1997 Chevrolet Cavalier

1 Answer

What is the right way to time a 4cyl Chevy S-10 timing chain


1998-2003 To Remove:
  1. Remove or disconnect the following:
    • Crankshaft pulley and hub
    • Drive belt tensioner gm_truck_s10_tcbolts.gif

    • Timing chain cover bolts gm_truck_s10_tc.gif

    • Timing chain cover and gasket
  2. Install a bolt in the end of the crankshaft CAUTION
    Do not install the crankshaft balancer bolt or a bolt longer than 1 inch or damage to the crankshaft threaded hole will result.
  3. Rotate crankshaft until the number 1 piston is at Top Dead Center of compression stroke.
  4. Make sure that the alignment marks are aligned with the tabs on the timing chain tensioner. gm-03-22-611.gif

  5. Measure distance between hole in bracket and unworn surface of timing chain tensioner shoe. NOTE: If distance between the hole and unworn surface of timing chain tensioner is greater than 0.314 in (8 mm), replace tensioner, timing chain and sprockets.
  6. Remove timing chain tensioner bolts.
  7. Remove the timing chain, timing chain tensioner and camshaft sprocket at the same time.
  8. Remove the crankshaft sprocket using special tool J 22888-20A or equivalent.
  9. Remove crankshaft sprocket alignment key.
gm-03-22-612.gif

NOTE: If any camshaft components are being replaced to correct a noise problem, all camshaft drive components must be replaced.
To Install:
  1. Install the crankshaft sprocket alignment key.
  2. Install the crankshaft sprocket using special tool J 5590 or equivalent. gm-03-22-613.gif

  3. Compress the timing chain tensioner spring and insert a pin into the tensioner hole to retain the tensioner shoe.
  4. Install timing chain and timing chain tensioner (do not tighten tension bolts).
  5. Align the crankshaft and camshaft timing marks with the tab on the timing chain tensioner.
  6. Tighten the timing chain tensioner bolts.
    • Torque to: 18 ft lbs (24 Nm)
  7. Tighten the camshaft sprocket bolt.
    • Torque to: 96 ft lbs (130 Nm)
  8. Remove pin from timing chain tensioner hole.
  9. Remove bolt from end of crankshaft. CAUTION
    Inspect the timing chain cover for warping or damage. Replace if needed.
  10. Clean all timing chain cover mating surfaces.
  11. Install or connect the following:
    • Timing chain cover to the engine block
      1. Ensure that the gasket is installed properly in the groove in the timing chain cover
    • Timing chain cover and make sure it fully seated on the alignment dowel pins
    • Timing chain cover bolts
      1. Torque to: 97 inch lbs (11 Nm)
    • Drive belt tensioner
    • Crankshaft damper hub and the crankshaft pulley

Aug 17, 2010 | 2000 Chevrolet S-10

1 Answer

Where are timing chain marks on the engine of


Please don't forget to rate:

39900a5.gif

Crankshaft and camshaft alignment marks—2.4L (VIN X) Engine

9f5c6e9.gif
Camshaft and crankshaft alignment marks—Chrysler 2.5L (VIN N) engine

acb6bd1.gif
Timing belt engine sprocket timing—2.5L (VIN H) engine

Jan 04, 2010 | 2001 Chrysler Sebring

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

557 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...