Timing Components: Service and Repair

Timing Drive Components





Special Tool(s)

Removal

CAUTION: Since the engine is not free-wheeling, timing procedures must be followed exactly or piston and valve damage can occur.

1. Remove the engine front cover.
2. Remove the roller followers.





3. Remove the crankshaft sensor ring from the crankshaft.





4. 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 with the keyway at the 2 o'clock position.





5. Install the special tools on the camshaft.





6. Remove the timing chain tensioning system from both timing chains.
^ Remove the bolts.
^ Remove the timing chain tensioners.
^ Remove the timing chain tensioner arms.





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.

Remove the RH and LH timing chains and the crankshaft sprocket.
^ Remove the RH timing chain from camshaft sprocket.
^ Remove the RH timing chain from the crankshaft sprocket.
^ Remove the LH timing chain from the camshaft sprocket.
^ Remove the LH timing chain and crankshaft sprocket.





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

NOTE: RH shown; LH 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.

Compress the tensioner plunger, using a softjawed vise.





2. Install a retaining clip on the tensioner to hold the plunger in during installation.
^ Remove the tensioner from the vise.

Marked Links:

3. If the copper links are not visible, mark one link on one end and one link on the other end and use as timing marks.





4. Install the timing chain guides.





5. 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.





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

NOTE: The number one cylinder is at Top Dead Center (TDC) when the stud on the engine block fits into the slot in the handle of the special tool.

Using the special tool, position the crankshaft so the number one cylinder is at TDC.
7. Remove the special tool.





8. Position the LH (inner) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.





9. Install the LH timing chain onto the crankshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.





10. NOTE: The LH timing chain tensioner arm has a bump near the dowel hole for identification.

Position the LH timing chain tensioner arm on the dowel pin and install the LH timing chain tensioner.





11. Remove the retaining clips from the LH timing chain tensioner.





12. Position the RH (outer) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.





13. Install the RH timing chain onto the crankshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.





14. Position the RH timing chain tensioner arms on the dowel pin and install the RH timing chain tensioner.





15. Remove the retaining clips from the RH timing chain tensioner.

Aligning Chain Marks:

16. Make sure that the copper (marked) chain links are lined up with the dots on the crankshaft sprockets and the camshaft sprocket.





17. Remove the special tools from the camshaft.





18. Position the crankshaft sensor ring on the crankshaft.
19. Install the camshaft roller followers.
20. Install the engine front cover.