- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
this indicates the sprocket teeth are worn and the pitch for the chain and the sprocket teeth are no longer compatible .or the chain is worn and stretched causing the same problem
check the teeth of the sprocket and if they look like triangles then replace the sprockets
they should look like small teeth that are fatter at the middle , ten slope off to the point
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.
Before servicing the vehicle, refer to the precautions section.
Drain the cooling system.
Remove or disconnect the following: Negative battery cable,Coolant surge tank,Accessory drive belt,Alternator
Install an engine support.
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
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.
Remove the timing chain guides.
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.
Remove or disconnect the following:Timing chain,
Camshaft sprockets
To install:
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.
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:
Rotated the crankshaft 90 degrees clockwise off Top Dead Center (TDC) in order to give the valves adequate clearance to open.
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.
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
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.
Leave the alignment dowel pins installed.
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.
Tighten the chain housing to engine stud. The stud is installed under the timing chain. Torque it to 19 ft. lbs. (26 Nm).
Reload the timing chain tensioner as follows:
Form a keeper from heavy gauge wire.
Slightly, compress the shoe plunger and insert a small screwdriver into the access hole.
Release the ratchet pawl and compress the plunger completely into the hole.
Insert the keeper between the access hole and the blade.
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.
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.
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
Remove the engine support.
Install or connect the following:Alternator. Torque the bolts to 37 ft. lbs. (50 Nm),Accessory drive belt,Coolant surge tank,Negative battery cable.
Belt tension would normally be adjusted at the rear wheel the same as a chain, if it is within spec though I would suggest you check the alignment as the belt may be pushing against the lip of the sprocket.
Remove all engine oil pan fasteners except two nuts at rear of engine.
Separate the engine oil pan from the front cover.
Disconnect the crankshaft position (CKP) sensor wire.
Remove engine front cover.
Pry the oil seal from the front cover.
Inspect the front cover seal area and crankshaft balancer seal area for damage.
Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
Remove the crankshaft position sensor reluctor ring.
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.
Remove the camshaft sprocket bolts.
Remove the camshaft sprocket.
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.
Remove the crankshaft sprocket using J 5825-A.
Remove the crankshaft balancer woodruff keys (if required).
To Install:
Install the crankshaft balancer woodruff keys into the crankshaft.
Align the crankshaft sprocket keyway with the crankshaft balancer woodruff key.
WARNING Wear eye protection when installing crankshaft sprocket.
Use J 5590 to install crankshaft sprocket.
Install the camshaft sprocket and camshaft timing chain.
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.
Install the camshaft sprocket bolts and tighten the camshaft sprocket bolts;
Torque to: 18 ft. lbs. (25 Nm)
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.
Install new engine front cover and bolts.
Torque bolts to: 106 in. lbs. (12 Nm)
Clean sealer from corners of oil pan gasket where it meets the engine front cover.
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.
It is a chain and its not the easiest but it could be worse.It is as follows: 1.9L SOHC Engine
Before servicing the vehicle, refer to the precautions in the beginning of this section.
Drain the engine oil.
Remove or disconnect the following:
Negative battery cable
Right front wheel and splash shield
NOTE: Place a 1 in. x 1 in. x 2 in. long block of wood between the torque strut and cradle to ease removal and installation of the torque engine mount.
3 right side upper engine torque axis to front cover nuts and the 2 mount to midrail bracket nuts, allowing the powertrain to rest on the block of wood
Drive belt, tensioner and pulley
Power steering pump attaching bolts and set the pump to the side with the lines still attached
A/C compressor from the bracket and set aside with the lines attached
Camshaft cover
Using a strap wrench or a piece of wood wedged between the damper spoke and the lower side of the engine front cover, hold the damper and remove the bolt. With a suitable 3-jaw puller and the slots cast into the damper, pull the crankshaft damper/pulley assembly from the crankshaft.
Install the special oil seal replacement tool SA9104E, to be sure the front crankshaft timing sprocket is held firmly in place and prevent guide damage. Install with the flat side towards the crankshaft sprocket.
Remove or disconnect the following:
Front 4 oil pan bolts and cut the seal away from the front cover
Front cover bolts and carefully pry the cover away from the cylinder block at the pry location tabs, which are provided. Remove the cover from under the hood or through the wheel well
Front cover oil seal from the cover
NOTE: During timing chain and sprocket removal, position the crankshaft 90 degrees past Top Dead Center (TDC), to be sure the pistons will not contact the valves upon assembly.
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).
Remove or disconnect the following:
Timing guides and tensioner
Camshaft sprocket bolt, using a 7⁄8 in. (21mm) wrench to hold the camshaft. Then, remove the timing chain and camshaft sprocket
Crankshaft sprocket
To install:
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.
Verify that the crankshaft keyway is positioned 90 degrees clockwise past TDC (keyway at 3 o'clock). The keyway should align with the split between the bearing cap and engine block.
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.
Install the crankshaft sprocket, then rotate the crankshaft counterclockwise 90 degrees up to No. 1 TDC (keyway at 12 o'clock).
Position the chain under the crankshaft sprocket and over the camshaft sprocket. The timing chain should be positioned so that 1 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.
Install or connect the following:
Timing pin to verify proper alignment of the camshaft and sprocket. Torque the sprocket bolt to 75 ft. lbs. (102 Nm).
NOTE: Do not allow the camshaft retaining bolt to torque against the timing pin or cylinder head damage will result.
Timing 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. Torque the bolts to 19 ft. lbs. (26 Nm) and verify that the pivot guide moves freely
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
Tensioner. Torque the bolts to 14 ft. lbs. (19 Nm), then remove the drill bit
Make one final check to verify all components are properly timed, then remove all timing pins.
Install or connect the following:
Seat a new front cover oil seal using the installation tool with a press
If the engine front cover casting or assembly is replaced, the 3 torque axis mount studs should also be replaced. Torque the new studs to 19 ft. lbs. (25 Nm).
Before servicing the vehicle, refer to the precautions in the beginning of this section.
drain the engine oil.
Remove or disconnect the following:
Negative battery cable
Right front wheel and splash shield
NOTE: Place a 1 x 1 x 2 in. (25 x 25 x 51mm) block of wood between the torque strut and cradle to ease removal and installation of the torque engine mount.
3 right side upper engine torque axis to front cover nuts and the 2 mount to midrail bracket nuts, allowing the powertrain to rest on the block of wood
Drive belt, tensioner and pulley
Power steering pump attaching bolts and set the pump to the side with the lines still attached
A/C compressor from the bracket and set it to the side with the lines attached
Camshaft cover
Using a strap wrench or a piece of wood wedged between the damper spoke and the lower side of the engine front cover, hold the damper and remove the bolt. With a suitable 3-jaw puller and the slots cast into the damper, pull the crankshaft damper/pulley assembly from the crankshaft.
Install the special oil seal replacement tool SA9104E or equivalent, to be sure the front crankshaft timing sprocket is held firmly in place and prevent guide damage. Install with the flat side towards the crankshaft sprocket.
Remove or disconnect the following:
Front 4 oil pan bolts and cut the seal away from the front cover
Front cover bolts and carefully pry the cover away from the cylinder block at the pry location tabs, which are provided. Remove the cover from under the hood or through the wheel well
Front cover oil seal from the cover
NOTE: During timing chain and sprocket removal, position the crankshaft 90 degrees past top Dead Center (TDC), to be sure the pistons will not contact the valves upon assembly.
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).
Timing guides and tensioner
Camshaft sprocket bolt, using a 7⁄8 in. (21mm) wrench to hold the camshaft. Then, remove the timing chain and camshaft sprocket
Just go to a larger front sprocket. An 18 tooth sprocket should help greatly. Alternate to that would be to get a smaller 38 tooth rear sprocket. The front sprocket will cost a lot less and is better for the chain than the current 16 tooth.
I don't get paid for my answers but I do take pride in them, and I am only trying to help. So if you will, > > > > A “very helpful” rating for this answer?Thanks!
×