Primary Camshaft Drive Chain Replacement
Removal Procedure1. Remove the engine assembly.
2. Remove the accessory drive belt.
3. Remove the accessory drive belt idler pulley.
4. Remove the accessory drive belt tensioner.
5. Remove the front cover.
6. Remove the oil pump.
7. Remove the left side cam cover.
8. Remove the right side cam cover.
9. Align all timing marks (1).
10. Remove the intermediate sprocket retaining bolt.
11. Remove the primary drive chain tensioner.
12. Remove the primary drive chain guide (1).
13. Remove the primary chain drive sprocket, the primary chain (3) and the intermediate sprocket as an assembly.
14. Remove the secondary drive chains from around the intermediate shaft sprocket.
15. Remove the intermediate sprocket shaft retaining bolts.
16. Remove the intermediate sprocket shaft (1).
17. Slide the gears and the primary drive chain off of the crankshaft and the intermediate shaft.
Important: The intermediate shaft should not be removed unless wear is evident.
Installation Procedure
^ Tools Required
- J39946 Crankshaft Rotation Socket
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the intermediate sprocket shaft (1) and the retaining bolts.
^ Tighten the intermediate sprocket shaft bolts to 10 Nm (89 inch lbs.).
2. Align the timing marks (1) of the intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
3. Install the primary timing chain on the drive sprockets.
4. Make sure that the piston number one is at Top Dead Center (TDC) and the crankshaft keyway is approximately at the one o'clock position.
5. Install the primary timing chain (3), intermediate sprocket and crankshaft sprocket as an assembly onto their respective shafts (2 and 4). Use the J39946 to align the crankshaft key (1) with the drive sprocket.
6. Install the intermediate sprocket retaining bolt.
^ Tighten the intermediate sprocket shaft bolt to 60 Nm (44 ft. lbs.).
7. Collapse the primary timing chain tensioner using the following procedure:
7.1. Rotate the ratchet release lever counterclockwise and hold.
7.2. Collapse the tensioner shoe and hold.
7.3. Release the ratchet lever and slowly release the pressure on the shoe.
8. As the ratchet lever moves to its first click, hold the tensioner shoe inward. Insert a pin through the hole in the release lever. The locked ratchet mechanism should hold the shoe in a collapsed position.
9. Install the primary timing chain guide (1) and retaining bolts.
^ Tighten the primary timing chain guide bolts to 25 Nm (18 ft. lbs.).
Important: Make sure the tensioner release lever faces toward you before tightening.
10. Install the primary timing chain tensioner and retaining bolts.
^ Tighten the primary timing chain tensioner bolts to 25 Nm (18 ft. lbs.).
11. Make sure the timing marks are aligned vertically.
Important: DO NOT remove the pin holding the tensioner until the secondary timing chains are installed.
12. Install the oil pump.
13. Install the left side cam cover.
14. Install the right side cam cover.
15. Install the accessory drive belt idler pulley.
16. Install the accessory drive belt tensioner.
17. Install the accessory drive belt.
18. Install the engine assembly.