Tools Required

J 44212  Camshaft Holding Tool

1. Install the right secondary camshaft drive chain guide.
   Fig 1: Installing Right Secondary Camshaft Drive Chain Guide

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2. Loosely install the lower right secondary camshaft drive chain guide bolt.
   Fig 2: Installing Lower Right Secondary Camshaft Drive Chain Guide Bolt

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3. Install the right secondary camshaft drive chain shoe.
   Fig 3: Installing Right Secondary Camshaft Drive Chain Shoe

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   CAUTION: Refer to FASTENER NOTICE in Cautions and Notices.
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 ft lbs).

   Fig 4: Installing Right Secondary Camshaft Drive Chain Shoe Bolt

   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 5: Installing Right Secondary Camshaft Drive Chain

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7. Install the right intake and exhaust camshaft sprockets into the right secondary camshaft drive chain.
   Fig 6: Installing Right Intake & Exhaust Camshaft Sprockets

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8. Install the right intake and exhaust camshafts 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 7: Installing Right Intake & Exhaust Camshafts

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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 notch to the camshaft pin.
10. Loosely install the right intake and exhaust camshaft sprocket bolts.
    Fig 8: Using Open Wrench On Hex Cast

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11. Ensure the perpendicular alignment of the right intake and exhaust camshaft sprocket notches and camshaft pins to the cylinder head.
    Fig 9: Identifying Perpendicular Alignment Of Right Intake & Exhaust Camshaft Sprocket Notches

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12. Install the J 44212  to the right cylinder head camshafts.
    Fig 10: Installing J 44212

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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 ft lbs).

    Fig 11: Installing Upper Right Secondary Camshaft Drive Chain Guide Bolt

    Courtesy of GENERAL MOTORS CORP.
14. Collapse the right secondary camshaft drive chain tensioner using the following procedure:
    1. 14.1. Rotate the ratchet release lever counter-clockwise and hold.
    2. 14.2. Collapse the right secondary camshaft drive chain tensioner shoe and hold.
    3. 14.3. 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 12: Collapsing Right Secondary Camshaft 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 ft lbs).

18. Remove pin from right secondary camshaft drive chain tensioner lever.
    Fig 13: Installing Right Secondary Camshaft Drive Chain Tensioner

    Courtesy of GENERAL MOTORS CORP.
19. Ensure the correct alignment of all secondary timing components.
    Fig 14: Identifying Secondary Timing Components Correct Alignment

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20. Ensure the correct alignment of all primary timing components (1, 2).
    Fig 15: Identifying Primary Timing Components Correct Alignment

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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 ft lbs).

    Fig 16: Tightening Camshaft Sprocket Bolts

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22. Install the chain guide access plugs located in the cylinder heads. Ensure the O-ring seal is on each access plug.

    Tighten 

    Tighten the chain guide access plugs to 4.5 N.m (39 in lbs).

    Fig 17: Installing Chain Guide Access Plugs

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23. Install a NEW O-ring on the camshaft position sensor.
24. Lubricate the O-ring with clean engine oil.
25. Install the camshaft position sensor.
26. Install the camshaft position sensor bolt.

    Tighten 

    Tighten the camshaft position sensor bolt to 10 N.m (89 in lbs).

    Fig 18: Installing Camshaft Position Sensor

    Courtesy of GENERAL MOTORS CORP.