I'm trying to take off timing chain cover of '70 firebird with the 400 block, which way does the crank bolt turn ? any tips on holding the engine from turning

There are a lot of steps, and you need to take your time. You will need access to a lift or jack stand, and make sure you keep the work area clean and organised, taking photos of the timing system will make your life easier when it comes to re-timing the engine.

Water Pump Replacement (2.4L)
Removal Procedure

1. Drain the coolant. Recover the coolant. Refer to Cooling System Draining and Filling.
2. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement in Engine Exhaust.
3. Remove the coolant intake pipe. Refer to Engine Coolant Inlet Pipe Replacement in Engine Cooling.
4. Lower the vehicle.
5. Disconnect the heater hose quick connect from the heater outlet pipe.
6. Remove the timing chain and tensioner. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement in Engine Mechanical - 2.4L. (see below procedure)
7. Remove the water pump cover-to-cylinder block bolts.
8. Remove water pump pipe to cylinder block bolt.
9. Remove the 3?water pump-to-timing chain housing nuts.
10. Remove the water pump and cover assembly.
11. Remove the water pump cover-to-coolant pump assembly bolts.
12. Clean all sealing surfaces.

Installation Procedure

Important: Before you install the coolant pump, read the entire procedure. Follow the tightening sequences in order to avoid part damage and to provide proper sealing.


1. Install the pump cover bolts. Hand tighten the bolts.
2. Install water pump cover assembly.
3. Install the cover-to-block bolts. Hand tighten the bolts.
4. Install the coolant pump-to-timing chain housing nuts. Hand tighten the nuts.
Notice: Refer to Fastener Notice in Cautions and Notices.

5. Torque in sequence as follows:
   1. Tighten the water pump-to-timing chain housing nuts.
      Tighten
      Tighten water pump to timing chain housing nuts to 26?Y (19?lb?ft).
   2. Tighten the pump cover-to-pump assembly bolts.
      Tighten
      Tighten the water pump cove to water pump bolts to 14?Y (124?lb?in).
   3. Tighten the coolant pump cover-to-engine block bolts. Tighten the bottom bolt first.
      Tighten
      Tighten water pump to engine block bolts to 26?Y (19?lb?ft).
6. Install heater hose to pipe on water pump.
7. Install the exhaust manifold and install new gaskets. Refer to Exhaust Manifold Replacement in Engine Exhaust.
8. Install oil level indicator tube and indicator. Refer to Oil Level Indicator Tube Replacement in Engine Mechanical-2.4L.
9. Connect the brake vacuum pipe to the cam housing.
10. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
11. Install catalytic converter to to manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
12. Install the coolant inlet pipe. Refer to Engine Coolant Inlet Pipe Replacement.
13. Install the timing chain and tensioner. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement in Engine Mechanical - 2.4L.
14. Lower the vehicle.
15. Connect the oxygen sensor connector.
16. Fill cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
17. Inspect the system for leaks.

Camshaft Timing Chain, Sprocket, and Tensioner Replacement
Removal Procedure

Caution: Refer to Battery Disconnect Caution in Cautions and Notices.
Notice: The timing chain on the 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 the crankshaft sprocket must be marked so that they are reinstalled in the same side facing out at the time of reassembly.

1. Disconnect the negative battery cable.
2. Remove the engine front cover. Refer to Engine Front Cover Replacement.
3. Rotate the crankshaft clockwise (as viewed from the front of the engine, normal rotation) until the camshaft sprocket timing dowel pin holes align with the holes in the timing chain housing.
4. Set the crankshaft sprocket keyway pointing upwards. Align with the centerline of the cylinder bores. This is the timed position.
5. Remove the timing chain guides.
6. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
7. Ensure that all of the slack in the timing chain is above the tensioner assembly.
8. Remove the timing chain tensioner bolts and the tensioner.
9. Remove the tensioner shoe. Use a small locking ring plier in order to engage the hole in the locking tab and remove the shoe from the stud.
Notice: Do not attempt to pry the sprocket off the camshaft or damage to the sprocket or chain housing could occur.
Important: Mark the timing chain and the crankshaft sprocket prior to removal. If the chain or the crankshaft sprocket is installed with the wear pattern in the opposite direction, noise and increased wear may occur.

10. Mark the crankshaft sprocket and the timing chain outer surface.
11. Remove the timing chain.
12. Lower the vehicle.
13. Holding the intake camshaft sprocket with J 39579, remove the sprocket bolt and washer.
14. Remove the washer from the bolt and rethread the bolt back into the camshaft.
15. Using a 3-jaw puller and the relief holes in the sprocket, remove the intake camshaft sprocket.
16. Repeat this procedure for the exhaust camshaft sprocket.
17. Clean the old sealant from the bolt with a wire brush.
18. Clean the threaded hole in the camshaft with a round nylon bristle brush.
19. Inspect the parts for wear. Replace the parts as necessary.Some scoring of the timing chain shoe and the guides is normal.
20. Replace the timing chain shoe or guides if the scoring exceeds 1.12?mm (45?in).

Installation Procedure

1. Use Adhesive/Sealant Compound GM?P/N?12345493 or equivalent on the camshaft sprocket bolt. Install the intake and exhaust camshaft sprockets onto the camshafts with the marked surface showing.Notice: Refer to Fastener Notice in Cautions and Notices.
   
2. Install the retaining bolts and washers to the intake and exhaust camshaft sprockets.
3. Tighten
   Tighten the bolts to 70?Y (52?lb?ft) while holding the sprockets with the J 39579.
4. Install the J 36800 through the holes in the camshaft sprockets into the holes in the timing chain housing. This will position the camshaft for correct timing.
5. If the camshafts are out of position (you must rotate the camshaft more than 1/8?turn in order to install the alignment dowel pins), use the following procedure:
   1. Rotate the crankshaft 90?degrees clockwise off of the 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 counter clockwise back to the top dead center.

Notice: Do not rotate the crankshaft clockwise to TDC. Valve or piston damage could occur.
Important: The side of the timing chain that was marked during removal must be showing when the chain is installed.

6. Install the timing chain over the exhaust camshaft sprocket, around the coolant pump, and around the crankshaft sprocket.
   1. Remove the alignment dowel pin from the intake camshaft.
   2. Using the J 39579, rotate the intake camshaft sprocket counterclockwise enough in order to slide the timing chain over the intake camshaft sprocket.
   3. Release the J 39579. The length of the chain between the 2?camshaft sprockets will tighten.
   4. 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.
7. Leave the alignment dowel pins installed.
8. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
9. The timing marks on the crankshaft and on the cylinder block should be aligned when the slack is removed from the chain linking the intake camshaft sprocket and the crankshaft sprocket. If the marks are not aligned, move the chain one tooth forward or rearward, remove the slack and re-examine the marks.

Important: Use the following steps in order to reset the timing chain tensioner assembly to the zero position.

10. Reset the timing chain tensioner assembly.
    1. Insert the tensioner plunger assembly into the tensioner housing.
    2. With the tensioner plunger fully extended, turn the complete assembly upside down on a bench or other flat surface.
    3. With the plunger face against the workbench, press firmly on the bottom of the tensioner housing.
    4. Compress the plunger until the plunger is seated flush in the tensioner.


11. Check the plunger to make sure the plunger is out of the cylinder at the correct dimension. The correct dimension for the plunger to extend out of the cylinder is 1.7?mm (0.07?in) maximum.


12. Loosely install the tensioner assembly and bolts to the timing chain housing.
13. Install the timing chain tensioner shoe on the stud.
14. Apply hand pressure to the timing chain tensioner shoe until the locking tab seats in the groove in the stud.
15. Tighten the timing chain tensioner bolts. Do Not overtighten.
    Tighten
    Tighten the bolts to 10?Y (89?lb?in).


Important: If the timing chain tensioner is not released from the installation position, engine damage will occur when the engine is started.

16. Release the timing chain tensioner plunger.
    1. Using a flat blade screwdriver, cotter pin remover, or similar tool, press firmly against the face of the timing chain tensioner plunger.
    Important: If the timing chain tensioner cannot be depressed, the plunger is not properly reset and the procedure for resetting the timing chain tensioner should be repeated.
    
    2. Depress the timing chain tensioner plunger until the plunger is bottomed out in the bore of the timing chain tensioner.
    3. Release the tensioner plunger. the plunger should press firmly against the back of the timing chain tensioner shoe.
17. Remove J 36800 from the camshaft sprockets.
18. Rotate the crankshaft clockwise 2?full rotations. Align the crankshaft keyway with the mark on the cylinder block, and reinstall the alignment dowel pins. The pins should slide in easily if the engine is timed correctly.


19. Install the timing chain guides.
20. Install the engine front cover. Refer to Engine Front Cover Replacement.
21. Connect the negative battery cable.
    Tighten
    Tighten the bolt to 16?Y (12?lb?ft).

• ENGINE 2.4L

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Balance Shaft Carrier to Block-Bolts

54

40

-

Balance Shaft Gear Cover-Double Ended Fastener

12

-

105

Balance Shaft Sprocket- Bolt

28

-

250

Balance Shaft Chain Tensioner-Bolts

12

-

105

Balance Shaft Carrier Cover-Bolts

12

-

105

Camshaft Sprocket-Bolt

101

75

-

Connecting Rod Cap-Bolts

54 +1/4 turn

40 +1/4 turn

-

Crankshaft Main Bearing Cap/Bedplate - M8 Bolts

34

250

-

M11 Bolts

41 +1/4 Turn

30 +1/4 Turn

-

Crankshaft Damper

136

100

-

Cylinder Head Cover- Bolts

12

-

105

Flex Plate to Crankshaft

95

70

-

Flywheel Mounting Bolts

81

60

-

Engine Mount Bracket Right-Bolts

61

45

-

Exhaust Manifold to Cylinder Head-Bolts

23

-

200

Exhaust Manifold Heat Shield-Bolts

12

-

105

Intake Manifold - Lower -Bolts

28

-

250

Oil Filter

20

15

-

Oil Pan-Bolts

12

-

105

Oil Pan Drain-Plug

27

20

-

Oil Pump to Block-Bolts

28

-

250

Oil Pump Cover Plate-Bolts

12

-

105

Oil Pump Pick-up Tube-Bolt

28

20

-

Oil Pump Relief Valve-Cap

41

30

-

Spark Plugs

28

Timing Belt Covers - Front Covers to Rear Cover-Bolts

12

-

105

- Rear Cover-Bolts

12

-

105

Timing Belt Tensioner Assembly-Bolts

61

45

-

For The 3.0 Motor. (3.3 Way down the line.)

Drain cooling system.
Remove timing belt. Refer to Engine for procedure.
Remove water pump mounting bolts.
Separate pump from water inlet pipe and remove water pump.

Timing Belt Removal
Raise vehicle and remove accessory drive belt splash shield (Fig. 66).
Remove accessory drive belts.
Remove crankshaft pulley and damper (Fig. 68).
Support engine and remove right side engine mount.
Remove engine support bracket (Fig. 67).
Remove timing belt covers (Fig. 67).
Mark belt running direction for installation (Fig. 69).
Loosen timing belt tensioner bolt (Fig. 71) and remove timing belt.
Remove crankshaft sprocket flange shield (Fig. 68). CAMSHAFT SPROCKETS To remove camshaft sprockets
Hold camshaft sprocket with Spanner Tool MB-990775. Loosen and remove bolt and washer (Fig. 70).
Remove camshaft sprocket from camshaft. To install camshaft sprockets:
Place camshaft sprocket on camshaft.
Install bolt and washer to camshaft. Using Spanner Tool MB-990775, hold camshaft sprocket and torque bolt to 95 Nm (70 ft. lbs.) (Fig. 70). TIMING BELT TENSIONER
Install timing belt tensioner and tensioner spring.
Hook spring upper end to water pump pin and lower end to tensioner bracket with hook out (Fig. 71).
Turn timing belt tensioner counterclockwise full travel in adjustment slot and tighten bolt to temporarily hold this position (Fig. 72).

INSTALLATION


Install timing belt on crankshaft sprocket and keep belt tight on tension side (Fig. 69). Install belt on the front (radiator side) camshaft sprocket. Install belt on the water pump pulley, rear camshaft sprocket and finally on the timing belt tensioner.
Rotate the front camshaft sprocket in opposite direction to take up belt slack. Check that all timing marks are aligned (Fig. 69).
Install crankshaft sprocket flange (Fig. 68).
Loosen tensioner bolt and allow spring to tension timing belt.
Turn crankshaft two full turns in clockwise direction. Turn smoothly and in clockwise direction ONLY.
Align the timing marks on the sprockets and tighten the timing belt tensioner locking bolt to 28 Nm (250 in. lbs.) torque.
Install timing belt covers.
Install engine support bracket.
Install right side engine mount.
Install crankshaft damper and pulleys (Fig. 68). Tighten damper center bolt to 135 Nm (100 ft. lbs.) .
Install accessory drive belts.
Install accessory drive belt splash shield (Fig. 66).

Be sure to also replace all the cam and crank seals why you are there. Might as well put a belt on too.

FOR THE 3.3 OR 3.8 MOTORS.

Drain Cooling System.
Remove accessory drive belt.
Remove right front lower fender shield.
Remove water pump pulley bolts and remove pulley.
Remove water pump mounting screws. Remove water pump.
Remove and discard O-ring seal.
Clean O-ring groove and O-ring surfaces on pump and chain case cover. Take care not to scratch or gouge sealing surface

Installation

Install new O-ring into groove.
Install water pump to chain case cover. Tighten screws to 12 Nm (105 inch lbs.) .
Rotate pump by hand to check for freedom of movement.
Position pulley on pump. Install screws and tighten to 30 Nm (250 inch lbs.) .
Install accessory drive belt.
Install right front lower fender shield.
Refill Cooling System.

FOR THE 2.4 MOTOR

Disconnect negative cable from battery.
Raise vehicle on a hoist. Remove right inner splash shield.
Remove accessory drive belts.
Drain cooling system.
Support engine from the bottom and remove right engine mount.
Remove right engine mount bracket.
Remove timing belt. Refer to Engine for procedure.
Remove timing belt idler pulley.
Hold camshaft sprocket with Special tool C-4687 and adaptor C-4687-1 while removing bolt. Remove both cam sprockets.
Remove rear timing belt cover.

Install new O-ring gasket in water pump body O-ring groove. CAUTION: Make sure O-ring is properly seated in water pump groove before tightening screws. An improperly located O-ring may cause damage to the O-ring and cause a coolant leak.
Assemble pump body to block and tighten screws to 12 Nm (105 inch lbs.) . Pressurize cooling system to 15 psi with pressure tester and check water pump shaft seal and O-ring for leaks.
Rotate pump by hand to check for freedom of movement.
Install rear timing belt cover.
Install camshaft sprockets and torque bolts to 101 Nm (75 ft. lbs.) .
Install timing belt idler pulley and torque mounting bolt to 61 Nm (45 ft. lbs.) .
Install timing belt. Refer to Engine for procedure.
Install right engine mount bracket and engine mount. Refer to Engine for procedure.
Fill cooling system.
Install accessory drive belts.
Lower vehicle and connect battery cable.

Please let me know if you have questions, and thanks for using Fixya.

To install:

1. Rotate the crankshaft so the No. 1 piston is at TDC and the mark on the crankshaft is at the 4 o-clock position.
2. Rotate the balance shaft so the timing mark is at the 5 o-clock position.
   NOTE Be sure the painted links are facing the front of the engine.
3. Install the timing chain on the sprockets.
4. Center the mark on the left intake camshaft sprocket between the 2 painted links.
5. Lift the chain onto the right intake camshaft sprocket. While doing this, align the marks on the balance shaft and crankshaft sprockets with the painted marks on the chain.
6. Verify that all of the timing marks are aligned.
7. Install the primary chain tensioner shoe. Torque the bolt to 22 ft. lbs. (30 Nm).
8. Compress the primary chain tensioner using the following steps:
   1. Rotate the ratchet release lever counterclockwise and hold it.
   2. Press the tensioner shoe in and hold it.
   3. Release the ratchet lever and slowly release the pressure on the shoe.
   4. Insert a pin through the hole in the lever as the lever moves to the first click. The ratchet should hold the shoe in the compressed position.
      NOTE Be sure the lever on the tensioner is facing you when installed.
      
   
   
9. Install or connect the following:
   
   Primary chain tensioner. Torque the bolts to 18 ft. lbs. (25 Nm); then remove the chain tensioner pin. 4 chain guide access plugs. Torque the plugs to 44 inch lbs. (5 Nm). Front engine lift bracket. Torque the hex head bolt to 37 ft. lbs. (50 Nm) and the internal drive bolt to 18 ft. lbs. (25 Nm). CMP sensor. Torque the bolts to 80 inch lbs. (9 Nm).
   
10. Remove the camshaft holding tools.
11. Place a small bead of RTV sealant on the 3 areas indicated in the diagram.
12. Install or connect the following:
    
    Front cover with a new gasket. Torque the bolts to 124 inch lbs. (14 Nm) and the coolant drain plug to 89 inch lbs. (10 Nm). Crankshaft balancer. Torque the bolt to 37 ft. lbs. (50 Nm); then an additional 120 degree turn.
    
13. Raise the engine cradle and install new bolts. Torque the bolts to 133 ft. lbs. (180 Nm).
14. Coat the sub-frame bushings with rubber lubricant.
15. Install or connect the following:
    
    Water pump with a new gasket. Torque the bolts to 124 inch lbs. (14 Nm). Belt tensioner. Torque the bolts to 37 ft. lbs. (50 Nm). Idler pulley. Torque the bolt to 37 ft. lbs. (50 Nm). Power steering pump pulley Drive belt Underhood accessory wiring junction block Washer and coolant reservoirs Battery and tray Front diagonal brace Rocker arm covers. Torque the bolts to 80 inch lbs. (9 Nm). Negative battery cable
    
16. Refill the cooling system.
17. Refill the crankcase.
18. Start the engine and verify no leaks.

Secondary Chain

1. Before servicing the vehicle, refer to the Precautions Section.
2. Disconnect the negative battery cable.
3. Remove the rocker arm cover and install camshaft holding fixture J-42038.
4. Remove the camshaft sprocket bolts and install the timing chain holding fixture J-42042 on the cylinder head.
5. Remove or disconnect the following:
   
   Sprockets and chain Secondary timing sprocket and chain
   

To install:

Fig. Correct sprocket alignment for the left secondary timing chain-3.5L engine

Fig. Correct sprocket alignment for the right secondary timing chain-3.5L engine

1. Install or connect the following:
   
   Secondary timing chain on the sprockets, with the drive pins at the 12 o-clock positions Sprockets and chain assembly onto the camshafts, with the chain properly aligned on the tensioner
   
2. Remove the timing chain holding fixture
3. Install the sprocket bolts. Torque the bolts to 18 ft. lbs. (25 Nm); then an additional 45 degree turn.
   
4. Remove the camshaft holding fixture.
5. Install or connect the following:
   
   Rocker arm cover Negative battery cable

• Car jack
• Jack stands
• Torque wrench
• Chain wrench
• 3/8 inch drive ratchet
• 1/2 inch drive ratchet
• 10 mm wrench
• 12 mm wrench
• 10 mm socket (3/8 inch)
• 14 mm socket (3/8 inch)
• 17 mm socket (1/2 inch)
• 19 mm socket (1/2 inch)
• Timing belt
• Balancer belt
• Bottle of Liquid Paper

Disconnect the negative battery terminal. Using a ½-inch-drive ratchet and the 19 mm socket, turn the center bolt on the crankshaft so that number-one cylinder piston is at top dead center (TDC). You will know you ware at TDC when the mark on the crank is in alignment with the arrow on the timing cover.

Disconnect the cruise control connector and remove the cruise control actuator. Loosen the upper mounting bolt with the 14 mm socket. Use a 12 mm socket to loosen the lower nut then use a 10 mm socket to loosen the adjuster from the power steering pump and remove the belt.

Loosen the upper air conditioner mounting bolt using the 14 mm socket. Use the 12 mm socket to loosen the lower nut and adjusting bolt on the alternator and remove the alternator/AC belt. Remove the valve cover using a 10 mm socket.

Place the jack behind the left front wheel where the arrow is located indicating the jack location, and raise the vehicle. Put the jack stand under the subframe behind the jack, then lower the jack. Remove the left front wheel for easy access to the crank pulley. Using a block of wood atop the jack, place the jack under the oil pan and lift with slight pressure to hold the engine in place. Remove the side engine mount using a 17 mm deep socket.

Take off the dipstick, pipe tube and upper timing cover using a 10 mm socket.
Then remove the timing belt adjuster rubber seal without loosening the adjuster nut. Take off the crankshaft pulley bolt. Use the chain wrench to hold the the crankshaft pulley while turning the crankshaft pulley bolt with a 19 mm socket. Use the 10 mm wrench and 10 mm socket to remove the bolts on the lower cover. Remove the lower cover and mark the location of the cam, crank and balancer shaft with Liquid Paper. Remove the balancer shaft belt and timing belt. Install the timing belt and the balancer shaft belt in the reverse order of removing them. During Installation of the crank pulley, coat the threads of the crank pulley bolt with engine oil and tighten it to 159 foot-pounds. Finally, adjust the tension of the power steering and alternator belts as well.

This design has no tensioner. Check the sprockets for wear on the tips--especially the crank sprocket. With the cover off, turn the crankshaft with a socket and see how close the chain comes to slipping backward on the sprocket. There are complete replacement procedures at AutoZone.com, which I will try to paste in below.

3.3L and 3.8L Engines

See Figure 18



Fig. Fig. 18: Timing mark alignment-3.3L and 3.8L engines

1. If possible, position the engine so that the No. 1 piston is at TDC on the compression stroke. Disconnect the negative battery cable. Drain the coolant.
2. Remove the timing chain case cover. For more information, refer to the Front Timing Cover and Seal procedure, earlier in this section.
3. Remove the camshaft gear attaching cup washer and remove the timing chain with both gears attached. Remove the timing chain snubber.

To install:

1. Assemble the timing chain and gears.
2. Turn the crankshaft and camshaft to line up with the key way locations of the gears.
3. Slide both gears over their respective shafts and use a straight edge to confirm alignment.
4. Install the cup washer and camshaft bolt. Tighten the bolt to 35 ft. lbs. (47 Nm).
5. Check camshaft end-play. The specification with a new plate is 0.002-0.006 in. (0.051-0.052mm) and 0.002-0.010 in. (0.51-0.254mm) with a used plate. Replace the thrust plate if not within specifications.
6. Install the timing chain snubber.
7. Thoroughly clean and dry the gasket mating surfaces.
8. Install new O-rings to the block.
9. Remove the crankshaft oil seal from the cover. The seal must be removed from the cover when installing to ensure proper oil pump engagement.
10. Using a new gasket, install the chain case cover to the engine.
11. Make certain that the oil pump is engaged onto the crankshaft before proceeding, or severe engine damage will result. Install the attaching bolts and tighten to 20 ft. lbs. (27 Nm).
12. Use tool C-4992, or equivalent, to install the crankshaft oil seal. Install the crankshaft pulley using a 5.9 in. suitable bolt and thrust bearing and washer plate L-4524, or equivalent. Make sure the pulley bottoms out on the crankshaft seal diameter. Install the bolt and tighten to 40 ft. lbs. (54 Nm).
13. Install all other parts removed during the chain case cover removal procedure and fill the engine with oil.
14. Connect the negative battery cable, road test the vehicle and check for leaks.

Hi Friend:

Your Timing Chain Tensioner is located in the Lower Front of your engine.

#1) you'll have to disconnect your negative Battery cable.

#2) Remove the Top Engine cover to give you better access to the Front of Engine.

#3) Then you'll need to remove your alternator and with wiring attached put it off to the Side you might have to tie it with a wire to secure it.

#4) then you'll need to remove your Power Steering Leave the Lines on it and Put it to the sideas well , Tie off if necessary.

#5) then Jack up the front of your car,make sure you Put Good Stands under the car to keep it secure.while you work under it.

#6) then remove the TWO front Oil Pan Bolts Only the very 2-Front ones.

#7) Then directly above the Oil pan front of the Engine you'll see your Crank Shaft Pulley Remove it, You will need a Puller to Remove it.then the Timing Chain Cover, There are Several bolts Holding it on to the front of the Engine.

#8) Remove ALL the Bolts on Timing over, then Take cover Off,It could be a Little Stubborn ,if All bolts are out for sure, Take a Small plastic mallet and Tap the Cover Easily,until it comes off.

#9) Now before you remove anything else there is a Timing Mark on the Cam Shaft and one on the Crank Shaft,NOTE: BESURE you line them marks up,The Cam Shaft Mark should be pointing Straight Down--And the Crankshaft Mark needs to be Pointing Straight up.and Lined up with the Top Timing Mark.If the are Not

NOTE: Rotate the Engine by Hand Turning the Sprockets until they are LINED Up.

Then Take off the Top Cam Shaft Mounting Bolts,then Pull Sproket and timing Chain at the Same Time.

Then Loosen the Chain Tensioner Bolt with out taking it ALL the Way OUT. then remove your Chain Tensioner.

If your this far i Recommend that you Replace The Timing Chain,Cam Sproket and Crankshaft Sproket as well.

If not the Install your new Chain Tensioner,And Just Simply Reverse the Un-Install Directions.To Put All back Together.

Do Replace the Timing Cover Seal. Using Proper Seal Remover and Installer.

Also before you put your Timing cover back on CLEAN the Surfaces of the Engine and the Cover.And Use a Gasket Sealer and Mount to Block ==Lining Up ALL your Timing Cover Bolt Holes. Let it set a Short time a Few Minutes at Least. To prevent Slipping when installing your Timing Case Cover.

1- Last Thing Torque your Timing Chain Tensioner at 89 Inch Pounds.Which rewuires a Torque Wrench.

And Torque ALL your Timing Cover Bolts at 97 Inch Pounds.Do NOT Over Tighten You'll Strip them.

MAKE Sure the Timing Marks are Still lined up.

This will get your Timing Chain Tensioner Replaced. Thanks for using FixYa From: d_hubbs

Timing Chain, Sprockets, Front Cover and Seal REMOVAL & INSTALLATION 2.5L and 4.0L Engines

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove or disconnect the following:
   • Negative battery cable
   • Accessory drive belt
   • Cooling fan and shroud
   • Crankshaft damper
   • Front crankshaft seal
   • Accessory brackets
   • Front cover
   • Oil slinger
3. Rotate the crankshaft so that the timing marks are aligned. Fig. 1: Timing chain alignment marks — 2.5L and 4.0L engines
   
   
4. Remove the timing chain and sprockets. To install:
   
5. For 2.5L engines, turn the timing chain tensioner lever to the unlock (down) position. Pull the tensioner block toward the tensioner lever to compress the spring. Hold the block and turn the tensioner lever to the lock (up) position. Fig. 2: Timing chain tensioner — 2.5L engines
   
   
6. Install the timing chain and sprockets with the timing marks aligned. Tighten the camshaft sprocket bolt to 80 ft. lbs. (108 Nm) for 2.5L engines or to 50 ft. lbs. (68 Nm) for 4.0L engines.
7. For 2.5L engines, release the timing chain tensioner.
8. Install or connect the following:
   • Oil slinger
   • New front crankshaft seal to the front cover
   • Front cover, using a new gasket
   • Timing Case Cover Alignment and Seal Installation Tool 6139 in the crankshaft opening to center the front cover Fig. 3: Timing Case Cover Alignment and Seal Installation Tool 6139 — 2.5L and 4.0L engines
     
   
   
9. Tighten the front cover bolts as follows:
   1. Step 1: Cover-to-block 1⁄4 inch bolts to 60 inch lbs. (7 Nm)
   2. Step 2: Cover-to-block 5⁄16 inch bolts to 16 ft. lbs. (22 Nm)
   3. Step 3: Oil pan-to-cover 1⁄4 inch bolts to 85 inch lbs. (9.5 Nm)
   4. Step 4: Oil pan-to-cover 5⁄16 inch bolts to 11 ft. lbs. (15 Nm)
10. Install or connect the following:
    • Accessory brackets
    • Crankshaft damper. Tighten the bolt to 80 ft. lbs. (108 Nm).
    • Cooling fan and shroud
    • Accessory drive belt
    • Negative battery cable
11. Start the engine and check for leaks.

This is like a big job.....You would do better to get a repair manual for less than $20/copy.

Disconnect your battery.
Line-up the crank-pulley up; camsaft up.
Remove distributor
Drain the coolant, remove water-pump, crank pulley, alternator, compressor-to give more room.
Remove the timing-chain cover.
Loosen the tensioner
Remove the cam-sprocket, and take off the old chain.
IRemove old gaskets.
Installation is reverse of removal. Crank-pulley and camshaft marks must be in proper positions, otherwise engine would damage.
**To avoid serious engine damage, let a shop do it!