Secondary Camshaft Intermediate Drive Chain Installation - Right Side

Special Tools 

EN 46328:  Camshaft Holding Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Right Secondary Camshaft Drive Chain Guide & Bolts
Courtesy of GENERAL MOTORS CORP.
1. Install the right secondary camshaft drive chain guide.
2. Loosely install the lower right secondary camshaft drive chain guide bolt.
Fig 2: Right Secondary Camshaft Drive Timing Chain Shoe & Bolt
Courtesy of GENERAL MOTORS CORP.
3. Install the right secondary camshaft drive chain shoe.
CAUTION: Refer to Fastener Caution .
4. Install the right secondary camshaft drive chain shoe bolt and tighten to 25 N.m (18 lb ft).
Fig 3: 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 4: Right Camshaft Position Actuators
Courtesy of GENERAL MOTORS CORP.
7. Install the right intake and exhaust camshaft position actuators into the right secondary camshaft drive chain.
Fig 5: Right Camshaft Sprockets
Courtesy of GENERAL MOTORS CORP.
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 6: Aligning Right Sprocket Notch To Camshaft Pin
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 position actuator oil control valves.
Fig 7: Alignment Of Right Camshaft Sprocket Notches & Pins
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 8: Camshaft Holding Tool
Courtesy of GENERAL MOTORS CORP.
12. Install the EN 46328:  tool to the right cylinder head camshafts.
Fig 9: 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 BOTH the upper and lower right secondary camshaft drive chain guide bolts to 25 N.m (18 lb ft).

Fig 10: Collapsing 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 11: Right Secondary Camshaft Drive Chain Tensioner & Bolts
Courtesy of GENERAL MOTORS CORP.
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 12: Alignment Of Secondary Timing Components
Courtesy of GENERAL MOTORS CORP.
19. Ensure the correct alignment of all secondary timing components.
Fig 13: Primary Timing Gear Alignment Marks
Courtesy of GENERAL MOTORS CORP.
20. Ensure the correct alignment of all primary timing components (1, 2).
Fig 14: Holding Intake Camshaft
Courtesy of GENERAL MOTORS CORP.
CAUTION: Refer to Torque Reaction Against Timing Drive Chain Caution .
21. Use an open end wrench on the hex cast into the left intake camshaft, in order to prevent the camshaft from rotating, when tightening the camshaft position actuator oil control valve on the left intake camshaft.
22. Tighten the camshaft position actuator oil control valve on the left intake camshaft to 120 N.m (89 lb ft).
Fig 15: Holding Exhaust Camshaft In Position
Courtesy of GENERAL MOTORS CORP.
23. Use an open end wrench on the hex cast into the left exhaust camshaft, in order to prevent the camshaft from rotating, when tightening the camshaft position oil actuator control valve on the left exhaust camshaft.
24. Tighten the camshaft position oil actuator control valve on the left exhaust camshaft to 120 N.m (89 lb ft).
Fig 16: Holding Intake Camshaft In Position
Courtesy of GENERAL MOTORS CORP.
25. Use an open end wrench on the hex cast into the right intake camshaft, in order to prevent the camshaft from rotating, when tightening the camshaft position actuator oil control valve on the right intake camshaft.
26. Tighten the camshaft position actuator oil control valve on the right intake camshaft to 120 N.m (89 lb ft).
Fig 17: Preventing Camshaft Rotation
Courtesy of GENERAL MOTORS CORP.
27. Use an open end wrench on the hex cast into the right exhaust camshaft, in order to prevent the camshaft from rotating, when tightening the camshaft position actuator oil control valve on the right exhaust camshaft.
28. Tighten the camshaft position actuator oil control valve on the right exhaust camshaft to 120 N.m (89 lb ft).