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 may occur.

1. Remove the engine front cover.





2. Remove the crankshaft sensor ring from the crankshaft.





3. Rotate the crankshaft until both camshaft keyways are 90 degrees from the valve cover surface. Make sure the copper links line up with the dots on the camshaft sprocket.





4. Install the special tools on the camshaft.





5. Remove the bolts and the LH timing chain tensioner.





6. Remove the bolts and the RH timing chain tensioner.





7. Remove the LH and AH timing chain tensioner arm from the dowel pins.
8. Remove the timing chains and crankshaft sprocket.





9. Remove the 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.

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

Compress the tensioner plunger, using an edge of a vise.





2. Using 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.





5. NOTE: There are 58 links in the 4.6L timing chains.

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.





6. Install the crankshaft sprocket, making sure the timing mark faces forward.





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





8. Install the timing chains.
- Install the LH (inner) timing chain on the crankshaft sprocket, aligning the copper link with the dot on the crankshaft sprocket.
- Install the LH (inner) timing chain on the camshaft sprocket, aligning the copper link with the dot on the camshaft sprocket.
- Install the RH (outer) timing chain on the crankshaft sprocket, aligning the copper link with the dot on the crankshaft sprocket.
- Install the RH (outer) timing chain on the camshaft sprocket, aligning the copper link with the dot on the camshaft sprocket.





9. Make sure that the (A) copper marks on the timing chain are lined up with the corresponding dots on the crankshaft sprockets and the camshaft sprockets.





10. Make sure that the (A) camshaft sprocket keyway is 90 degrees from the (B) valve cover mounting surface.





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

Position the LH and RH timing chain tensioner arm on the dowel pins.





12. Position the RH timing chain tensioner and install the bolts.





13. Position the LH timing chain tensioner and install the bolts.





14. Remove both the RH and LH retaining pins from the timing chain tensioner.





15. Remove the special tools from the camshaft





16. Install the crankshaft sensor ring on the crankshaft.
17. Install the engine front cover.