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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Mechanical - 2.4L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Exhaust Camshaft and Lifter Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: View Of Hydraulic Element Lash Adjusters
    GM412197Courtesy of GENERAL MOTORS CORP.
  1. Install the hydraulic element adjusters into their bores in the cylinder head.
  2. Lubricate the hydraulic lash adjusters with GM PN 12345501 (Canadian PN 992704) or equivalent.
    3. Fig 2: Lubricating Valve Tips
    GM412514Courtesy of GENERAL MOTORS CORP.
  3. Lubricate the valve tips with GM PN 12345501 (Canadian PN 992704) or equivalent.
    4. Fig 3: Identifying Exhaust Camshaft Roller Followers
    GM412194Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: 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.
  4. Position the roller followers on the tip of the valve stem and on the lash adjuster, apply lubricate GM PN 12345501 (Canadian PN 992704) or equivalent.
    5. Fig 4: Identifying Intake/Exhaust Camshaft
    GM1578307Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust camshaft (3). Lubricate with GM PN 12345501 (Canadian PN 992704) or equivalent.
    6. Fig 5: View Of Camshaft Bearing Caps
    GM1578308Courtesy of GENERAL MOTORS CORP.
  6. Install the camshaft bearing caps. Hand tighten the cap bolts.
  7. Tighten the bearing cap bolts in increments of 3 turns until they are seated.

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  8. Install the exhaust camshaft position actuator. Refer to Camshaft Position Actuator Replacement - Exhaust .
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