Timing Components: Service and Repair

Special Tools:

Removal

CAUTION: Since the engine is not free-wheeling, if the crankshaft or the camshafts are moved in any manner during removal and installation, the crankshaft and the camshafts must be re-synchronized.

1. Remove the engine front cover.





2. Remove the crankshaft sensor ring from the crankshaft.





3. CAUTION: Unless otherwise instructed, at no time when the timing chains are removed and the cylinder heads are installed is the crankshaft or the camshaft to be rotated. Severe piston and valve damage will occur.

Using the special tool, position the crankshaft as shown.





4. Install the special tool.





5. Note: LH shown; RH similar.

Remove the two bolts, the timing chain tensioner and tensioner arm.





6. CAUTION: Unless otherwise instructed, at no time when the timing chains are removed and the cylinder heads are installed is the crankshaft or the camshaft to be rotated. Severe piston and valve damage will occur.

CAUTION: Do not remove the special tool from the camshafts.

Remove the LH and RH timing chains and the crankshaft sprockets.
- Remove the special tool from the crankshaft.
- Remove the RH timing chain from camshaft sprocket.
- Remove the RH timing chain and the outer crankshaft sprocket from the crankshaft.
- Repeat for the LH timing chain and crankshaft sprocket.





7. CAUTION: The bolts are different lengths and must be returned to their original location.

Note: LH shown; RH similar.

Remove the bolts and the timing chain guides.

Installation





1. CAUTION: Timing chain procedures must be followed exactly or damage to the pistons or valves will result.

CAUTION: Do not compress the ratchet assembly. This will damage the ratchet assembly.

Compress the tensioner plunger, using the edge of a soft-jawed vise.





2. Use a small screwdriver or pick, push back and hold the ratchet mechanism.





3. While holding the ratchet mechanism, push the ratchet arm back into the tensioner housing.





4. Install a paper clip into the hole in the tensioner housing to hold the ratchet assembly and plunger in during installation.
- Remove the tensioner from the vise.





5. If the copper links arc not visible, mark two links on one end and one link on the other end, and use as timing marks.





6. Install the timing chain guides.





7. Remove the special tool.





8. Rotate the LH camshaft sprocket until the timing mark is approximately at the 12 o'clock position. Rotate the RH camshaft timing sprocket until the timing mark is approximately in the 11 o'clock position.





9. Install the special tool.





10. CAUTION: Unless otherwise instructed, at no time when the timing chains are removed and the cylinder heads are installed is the crankshaft or the camshaft to be rotated. Severe piston and valve damage will occur.

CAUTION: Rotate the crankshaft counterclockwise only. Do not rotate past position shown or severe piston or valve damage will occur.

Using the special tool, position the crankshaft.

11. Remove the special tool.

Fig. 26 Crankshaft Sprocket Position:

12. Position the inner crankshaft sprocket with the long hub facing outward.
- The outer hub will face inward.





13. Note: LH timing chain shown; RH similar.

Install the LH timing chain onto the crankshaft sprocket, aligning the one copper link on the timing chain with the slot on the crankshaft sprocket.





14. Verify the camshaft sprocket to copper link alignment.





15. Note: LH shown; RH similar.

Position the tensioner arms and tensioners, and install the bolts.





16. Remove the paper clips used to retain the ratchet assemblies.





17. Remove the special tool.





18. Position the crankshaft sensor ring on the crankshaft.
19. Install the engine front cover.