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Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Hydraulic Lash Adjusters
    GM1825043Courtesy of GENERAL MOTORS COMPANY
  1. Install the hydraulic lash adjusters into their bores in the cylinder head and lubricate. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    2. Fig 2: Valve Tips
    GM1825091Courtesy of GENERAL MOTORS COMPANY
  2. Lubricate the valve tips. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    3. Fig 3: Exhaust Camshaft Roller Finger Followers
    GM1825041Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Used roller followers must be returned to the original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.

  3. Position the roller followers on the tip of the valve stem and on the lash adjuster and lubricate. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    4. Fig 4: Identifying Proper Exhaust/Intake Camshaft Alignment positions
    GM1825076Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If equipped with the following engine; LE5, LE9, LAT, LNF, LDK, LHU, LTD, LBN, ensure the intake camshaft notch is in the 5 o'clock position and the exhaust camshaft notch is in the 7 o'clock position.

  4. Ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.
    5. Fig 5: Camshaft Notches
    GM2224131Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If equipped with following engine; LEA, LUK, ensure the intake camshaft notch is in the 10 o'clock position and the exhaust camshaft notch is in the 7 o'clock position.

  5. Ensure the intake camshaft notch is in the 10 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.
    6. Fig 6: Intake Camshaft & Caps
    GM1825077Courtesy of GENERAL MOTORS COMPANY
  6. Set the exhaust camshaft on top of the roller followers in the camshaft bearing journals and lubricate. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    7. Fig 7: Oil Seals
    GM1846063Courtesy of GENERAL MOTORS COMPANY
  7. Rotate the oil seal in the groove of the number one camshaft journal so the split line (1) is at approximately the 12:00 position before installing the camshaft caps.
    8. Fig 8: Camshaft Notches
    GM2224131Courtesy of GENERAL MOTORS COMPANY
  8. Install the exhaust camshaft with the notch on the front (1) at approximately the 7 o'clock position.
  9. Install the camshaft caps and hand start the camshaft cap bolts.
    10. CAUTION:

    Refer to Fastener Caution .

  10. Tighten the camshaft cap bolts in increments of 3 turns until they are seated. Tighten the camshaft caps to 10 N.m (89 lb in).
    11. Fig 9: Exhaust Camshaft Position Actuator Solenoid Valve & Bolt
    GM2074543Courtesy of GENERAL MOTORS COMPANY
  11. Install the exhaust camshaft position actuator solenoid valve (2). Tighten the solenoid valve bolt (1) to 10 N.m (89 lb in).
  12. Install the exhaust camshaft position actuator. Refer to Camshaft Position Exhaust Actuator Replacement .
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