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. Install the special tools on the camshaft.





5. Rotate the crankshaft until the timing mark on the RH camshaft sprocket is approximately at the 11 o'clock position and the timing mark on the LH camshaft sprocket is approximately at the 12 o'clock position.





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

Install the crankshaft holding tool to check the correct positioning of the camshaft sprockets.





7. Remove the crankshaft holding tool and 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.





8. Remove the LH and RH timing chains and the crankshaft sprocket.
^ Remove the RH tinning chain from the camshaft sprocket.
^ Remove the RH timing chain from the crankshaft sprocket.
^ Repeat for the LH timing chain and crankshaft sprocket.





9. Remove both timing chain guides.
1 Remove the bolts.
2 Remove the LH timing chain guide.
3 Remove the bolts.
4 Remove the RH timing chain guide.

Installation





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

Compress the tensioner plunger, using a vise.





2. Install a retaining clip on the tensioner to hold the plunger in place during installation.

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





5. Remove the special tools from the camshaft.





6. Install the crankshaft sprocket, making sure the flange faces forward.





7. Install the timing chain guide.
1 Position the LH timing chain guide.
2 Install and tighten the LH bolts.
3 Position the RH timing chain guide.
4 Install and tighten the RH bolts.

Special Tool, Position Cyl.1 At TDC.:

8. CAUTION: Unless otherwise instructed, do not rotate either the crankshaft or the camshafts, when the timing chains are removed and the cylinder heads are installed. Severe piston and valve damage will occur. When instructed to do so, rotate the crankshaft counterclockwise only. Do not rotate past the position shown or severe piston and valve damage can 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.
9. Remove the special tool.





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





11. Install the LH timing chain on the camshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.





12. 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.





13. Remove the retaining clip from the LH timing chain tensioner.





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





15. Install the RH timing chain on the camshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.





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





17. Remove the retaining clip from the RH timing chain tensioner.

Aligning Chain Marks:

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





19. Remove special tools from the camshaft.





20. Install the crankshaft sensor ring on the crankshaft.
21. Install the roller followers.
22. Install the engine front cover.