Tools Required

J 44212  Camshaft Holding Tool. See Special Tools .

Fig 1: View of Right Secondary Camshaft Drive Chain Guide
Courtesy of GENERAL MOTORS CORP.
1. Install the right secondary camshaft drive chain guide.
Fig 2: Identifying Lower Right Secondary Camshaft Drive Chain Guide Bolt
Courtesy of GENERAL MOTORS CORP.
2. Loosely install the lower right secondary camshaft drive chain guide bolt.
Fig 3: View of Right Secondary Camshaft Drive Chain Shoe
Courtesy of GENERAL MOTORS CORP.
3. Install the right secondary camshaft drive chain shoe.
Fig 4: Identifying Right Secondary Camshaft Drive Chain Shoe Bolt
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice .
4. Install the right secondary camshaft drive chain shoe bolt.

   Tighten:  Tighten the right secondary camshaft drive chain shoe bolt to 25 N.m (18 lb ft).

Fig 5: View of Right Secondary Camshaft Drive Chain
Courtesy of GENERAL MOTORS CORP.
5. Install the right secondary camshaft drive chain by sliding the chain down through the right cylinder head and placing the chain on the end of the camshafts.
6. Route the right secondary camshaft drive chain around the outer row of the intermediate drive chain sprocket teeth.
Fig 6: Identifying Camshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
7. Install the right intake and exhaust camshaft sprockets into the right secondary camshaft drive chain.
Fig 7: Right Intake And Exhaust Camshafts Sprockets
Courtesy of GENERAL MOTORS CORP.
8. Install the right intake and exhaust camshafts sprockets onto the camshafts. The camshaft sprocket notch marked "RI" which indicates right intake, engages the intake camshaft pin and the camshaft sprocket notch marked "RE" which indicates right exhaust, engages the exhaust camshaft pin.
Fig 8: Securing Camshaft
Courtesy of GENERAL MOTORS CORP.
9. If necessary, use an open wrench on the hex cast near the front of each camshaft to help align the sprocket notch to the camshaft pin.
10. Loosely install the right intake and exhaust camshaft sprocket bolts.
Fig 9: Aligning Right Intake & Exhaust Camshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
11. Ensure the perpendicular alignment of the right intake and exhaust camshaft sprocket notches and camshaft pins to the cylinder head.
Fig 10: Using Camshaft Holding Tool
Courtesy of GENERAL MOTORS CORP.
12. Install the J 44212  to the right cylinder head camshafts. See Special Tools .
Fig 11: View Of Upper Right Secondary Camshaft Drive Chain Guide Bolt
Courtesy of GENERAL MOTORS CORP.
13. Install the upper right secondary camshaft drive chain guide bolt.

    Tighten:  Tighten BOTH the upper and lower right secondary camshaft drive chain guide bolts to 25 N.m (18 lb ft).

Fig 12: Collapsing Primary Camshaft Drive Chain Tensioner
Courtesy of GENERAL MOTORS CORP.
14. Collapse the right secondary camshaft drive chain tensioner using the following procedure:
    1. Rotate the ratchet release lever counter-clockwise and hold.
    2. Collapse the right secondary camshaft drive chain tensioner shoe and hold.
    3. Release the ratchet lever and slowly release the pressure on the shoe.
15. When the ratchet lever moves to the first detent a click should be heard and felt. Insert a pin through the hole in the release lever in order to lock the right secondary camshaft drive chain tensioner shoe in the collapsed position.
Fig 13: View Of Right Secondary Drive Chain Tensioner
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Ensure the right secondary camshaft drive chain tensioner release lever is facing out.
16. Install the right secondary camshaft drive chain tensioner.
17. Install the right secondary camshaft drive chain tensioner bolts.

    Tighten:  Tighten the right secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).

18. Remove pin from right secondary camshaft drive chain tensioner lever.
Fig 14: Correct Alignment of Secondary Timing Components
Courtesy of GENERAL MOTORS CORP.
19. Ensure the correct alignment of all secondary timing components.
Fig 15: Identifying Primary Timing Gear Alignment Marks
Courtesy of GENERAL MOTORS CORP.
20. Ensure the correct alignment of all primary timing components (1, 2).
Fig 16: Securing Camshaft
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
21. Tighten ALL camshaft sprocket bolts. Use the hex cast into each camshaft to prevent engine rotation and provide leverage.

    Tighten:  Tighten ALL camshaft sprocket bolts to 120 N.m (90 lb ft).

Fig 17: Identifying Cylinder Head Core Hole Plugs
Courtesy of GENERAL MOTORS CORP.
22. Install the cylinder head core hole plugs located in the cylinder heads. Ensure the O-ring seal is on each cylinder head core hole plug.

    Tighten:  Tighten the cylinder head core hole plugs to 4.5 N.m (39 lb in).