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. Using the special tool, secure the camshaft.





5. Remove the timing chain tensioning system from both timing chains.
1 Remove the bolts.
2 Remove the timing chain tensioners.
3 Remove the timing chain tensioner arms.





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.

Remove the special tool.





7. 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.





8. NOTE: The LH guide is shown, the RH is similar.

Remove 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 against 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 are 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 12 o'clock. Rotate the RH camshaft timing sprocket until the timing mark is approximately 11 o'clock.





9. Using the special tool, secure the camshaft.





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 and/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.





13. 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. NOTE: If necessary, adjust the camshaft sprocket lightly to obtain the timing mark alignment.

Position the timing chain on the camshaft sprocket with the two copper links and the camshaft sprocket timing mark aligned.





15. CAUTION: The camshafts will move if they are not secure. Be sure the special tools are locked in position.

NOTE: Be sure the copper links and the sprocket marks are aligned.

NOTE: If necessary adjust the camshaft sprocket to obtain timing mark alignment.

Position the outer crankshaft sprocket and the RH timing chain with the long hub of the sprocket facing inward.





16. Verify the camshaft sprocket to copper link alignment.





17. NOTE: The LH tensioner is shown, the RH is similar.

Install the tensioner arms and tensioners.





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





19. Remove the special tool.





20. Position the crankshaft sensor ring on the crankshaft.
21. Install the engine front cover.