Timing Drive Components
Timing Drive ComponentsSpecial Tools And Equipment:
Special Tool(s)
Removal
1. Remove the engine front cover.
2. Remove the camshaft roller followers.
3. Remove the crankshaft sensor ignition pulse ring.
4. CAUTION: Since the engine is not free wheeling, timing procedures must be followed exactly or piston and valve damage can occur.
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 12 o'clock position.
5. Install the special tool.
6. NOTE: RH shown, LH similar.
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. Remove the RH camshaft sprocket mounting bolt and the washer.
8. Remove the RH timing chain.
9. Remove the RH camshaft sprocket.
10. Remove the LH camshaft sprocket mounting bolt and the washer.
11. Remove the LH timing chain.
12. Remove the LH camshaft sprocket.
13. Remove the crankshaft gear.
14. Remove the LH timing chain guide upper mounting bolt.
15. Remove the LH timing chain guide lower mounting bolt.
16. Remove the LH timing chain guide.
17. Remove the RH timing chain guide upper mounting bolt.
18. Remove the RH timing chain guide lower mounting bolt.
19. Remove the RH timing chain guide.
20. Remove the RH intake camshaft gear mounting bolt, washer and spacer.
21. Remove the LH intake camshaft gear mounting bolt, washer and spacer.
22. Remove the LH secondary timing chain tensioner mounting bolts and tensioner.
23. Remove the RH secondary timing chain tensioner mounting bolts and tensioner.
24. Remove the RH exhaust secondary camshaft sprocket.
25. Remove the RH secondary camshaft timing chain.
26. Remove the RH intake secondary camshaft sprocket.
27. Remove the LH intake secondary camshaft sprocket.
28. Remove the LH exhaust secondary camshaft sprocket
29. Remove the LH secondary camshaft timing chain.
Installation
All engines
1. NOTE: Compress the tensioner and install the retaining pin.
NOTE: LH tensioner shown, RH tensioner similar.
Install the tensioners.
^ Tighten to 10 Nm (89 inch lbs.).
2. CAUTION: Timing marks must be at the 12 o'clock position and indexed at the 6 o'clock position.
Install the camshaft sprockets and chain as an assembly.
3. Install the special tool.
4. NOTE: Do not tighten the bolt at this time.
Install the camshaft spacer, washer and bolt.
5. NOTE: Do not tighten the bolt at this time.
Install the camshaft gear, washer and bolt.
6. ighten the bolts in 2 stages:
^ Stage 1: Tighten to 40 Nm (30 ft. lbs.).
^ Stage 2: Tighten an additional 90 degrees.
Engines with ratcheting tensioners
7. 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.
NOTE: LH shown, RH similar.
Compress each plunger, using an edge of a vise.
8. Using a small screwdriver or pick, push back and hold the ratchet mechanism.
9. While holding the ratchet mechanism, push the ratchet arm back into the tensioner housing.
10. Install a paper clip into the hole of each tensioner housing to hold the ratchet assembly and plunger in during installation.
^ Remove the tensioner from the vise.
Engines with non-ratcheting tensioners
11. CAUTION: If one or both tensioner mounting bolts are loosened or removed, the tensioner-sealing bead must be inspected for seal integrity. Any cracks, tears, cuts or separation from the tensioner body or permanent compression of the seal bead, will require replacement of the tensioner.
Inspect the RH and LH timing chain tensioners.
^ Install new tensioners as necessary.
12. CAUTION: Timing chain procedures must be followed exactly or damage to valves and pistons will result.
NOTE: LH shown, RH similar.
Compress each tensioner plunger, using a vise.
13. Install a retaining clip on each tensioner to hold he plunger in during installation.
All engines
14. 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.
15. Install the timing chain guides.
^ To Install, tighten to 10 Nm (89 inch lbs.).
16. 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 at the 11 o'clock position.
17. 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.
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.
18. Position the LH (inner) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.
19. Install the LH timing chain onto the camshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.
20. NOTE: The LH timing chain tensioner arm has a bump near the dowel hole for identification.
Position the LH timing chain tensioner arms on the dowel pin and install the LH timing chain tensioner.
^ To install, tighten to 25 Nm (18 ft. lbs.).
Engines with ratcheting tensioners
21. Remove the retaining clip from the LH timing chain tensioner.
Engines with non-ratcheting tensioners
22. Remove the retaining clip from the LH timing chain tensioner.
All engines
23. Position the RH (outer) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.
24. Install the RH timing chain onto the camshaft sprocket, aligning the copper (marked) link with the timing marks on the sprocket.
25. Position the RH timing chain tensioner arms on the dowel pin and install the RH timing chain tensioner.
^ To install, tighten to 25 Nm (18 ft. lbs.).
Engines with ratcheting tensioners
26. Remove the retaining clip from the RH timing chain tensioner.
Engines with non-ratcheting tensioners
27. Remove the retaining clips from the RH timing chain tensioner.
All engines
28. Make sure that the copper (marked) chain links are lined up with the dots on the crankshaft sprockets and the camshaft sprocket.
29. Install the crankshaft sensor ignition pulse ring.
30. Install the camshaft roller followers.
31. Install the engine front cover.