Timing Chain, Sprockets, and/or Tensioner Replacement

Removal Procedure

^ Tools Required
- J 5825-A Crankshaft Gear Puller

Caution: Refer to Battery Disconnect Caution in Service Precautions.





1. Disconnect the negative battery cable.
2. Drain the coolant. Recover the coolant.
3. Remove the crankcase front cover.
4. Place the #1 piston at top dead center (#4 firing position).
5. Align the mark on the camshaft sprocket (4) with the timing mark on the bottom of the timing chain dampener (1).





6. Remove the camshaft sprocket bolt.





7. Remove the camshaft sprocket (4).
8. Remove the timing chain (3).





Important: If the sprocket does not remove easily, lightly knock the lower edge of the sprocket using a plastic mallet in order to dislodge the sprocket.

9. Remove the crankshaft sprocket using the J 5825-A.


Installation Procedure

^ Tools Required
- J 38612 Crankshaft Sprocket Installer





1. Install the crankshaft sprocket using the J 38612.
2. Apply prelude GM P/N 1052365 or an equivalent to the crankshaft sprocket thrust surface.





3. Install the timing chain dampener.

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the timing chain dampener bolts.

^ Tighten the timing chain dampener bolt to 21 Nm(15 ft. lbs.).





5. Align the crankshaft timing mark (2) to the timing mark on the bottom of the timing chain dampener (1).
6. Hold the camshaft sprocket with the timing chain hanging down.
7. Install the timing chain to the crankshaft gear.
8. Align the timing mark on the camshaft gear (4) with the timing mark on top of the timing chain dampener (3).





9. Align the dowel in the camshaft with the dowel hole in the camshaft sprocket.
10. Draw the camshaft sprocket onto the camshaft using the mounting bolt.
11. Coat the crankshaft and the camshaft sprocket with engine oil.

^ Tighten the bolt to 140 Nm (103 ft. lbs.).

12. Install the crankcase front cover.
13. Fill the cooling system.
14. Connect the negative battery cable.