Secondary Camshaft Intermediate Drive Chain Installation - Right Side

Special Tools 

J 44212  Camshaft Holding Tool

For equivalent regional tools, refer to Special Tools .

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

Refer to Fastener Caution .

4. Install the right secondary camshaft drive chain shoe bolt. 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
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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
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7. Install the right intake and exhaust camshaft sprockets into the right secondary camshaft drive chain.
Fig 7: Right Intake And Exhaust Camshafts Sprockets
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NOTE:

Do not use the stamped indicator marks for perpendicular alignment when installing the timing chain.

8. Install the right intake and exhaust camshafts sprockets onto the camshafts. The camshaft sprocket slot marked "RI" which indicates right intake, engages the intake camshaft pin and the camshaft sprocket slot marked "RE" which indicates right exhaust, engages the exhaust camshaft pin.
Fig 8: Securing Camshaft
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9. If necessary, use an open wrench on the hex cast near the front of each camshaft to help align the sprocket slot to the camshaft pin.
10. Loosely install the right intake and exhaust camshaft sprocket bolts.
Fig 9: Aligning Right Intake & Exhaust Camshaft Sprocket
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11. Ensure the perpendicular alignment of the right intake and exhaust camshaft sprocket slots and camshaft pins to the cylinder head.
Fig 10: Using Camshaft Holding Tool
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12. Install the J 44212  tool to the right cylinder head camshafts.
Fig 11: View Of Upper Right Secondary Camshaft Drive Chain Guide Bolt
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13. Install the upper right secondary camshaft drive chain guide bolt. 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
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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 COMPANY
NOTE:

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 and tighten 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
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19. Ensure the correct alignment of all secondary timing components.
Fig 15: Identifying Primary Timing Gear Alignment Marks
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20. Ensure the correct alignment of all primary timing components (1, 2).
Fig 16: Securing Camshaft
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CAUTION:

Refer to Torque Reaction Against Timing Drive Chain Caution .

21. Tighten ALL camshaft sprocket bolts to 120 N.m (90 lb ft). Use the hex cast into each camshaft to prevent engine rotation and provide leverage.
Fig 17: Cylinder Head Core Hole Plugs
Courtesy of GENERAL MOTORS COMPANY
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 to 4.5 N.m (39 lb in).