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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 791 (Engine Mechanical - 2.4L) >> Repair Instructions - On Vehicle >> Camshaft Position Exhaust Actuator Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Exhaust Camshaft Actuator & Bolt
    GM1578298Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the alignment mark made previously on the intake camshaft actuator is still aligned properly with the mark on the timing chain.
    IMPORTANT: The exhaust camshaft may need to be rotated clockwise to fully set the camshaft actuator.
  1. Install the timing chain onto the exhaust camshaft actuator.
  2. Align the exhaust camshaft actuator alignment mark made previously with the timing chain mark and install the actuator onto the camshaft.
  3. Install a NEW exhaust camshaft actuator bolt (2) until snug.
    4. Fig 2: View Of Timing Chain Retention Tool
    GM2066482Courtesy of GENERAL MOTORS CORP.
  4. Remove the timing chain retention tool EN-48749  (1) from the exhaust side of the timing chain.
    5. Fig 3: View Of Timing Chain Tensioner
    GM1578295Courtesy of GENERAL MOTORS CORP.
  5. Install the timing chain tensioner.

    Tighten:  Tighten the tensioner to 75 N.m (55 lb ft).

    6. Fig 4: Loosening/Tightening Camshaft Actuator Retainer Bolts
    GM2066456Courtesy of GENERAL MOTORS CORP.
  6. Install the camshaft actuator retainer (1).
  7. Install the camshaft actuator retainer bolts.

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

    8. Fig 5: Identifying J 44217 Timing Chain Tensioner Tool
    GM1673556Courtesy of GENERAL MOTORS CORP.
  8. Remove the tool (1) from the exhaust camshaft side of the timing chain assembly.
  9. Install a 24 mm wrench onto the hex on the camshaft in order to hold the camshaft.
  10. Tighten the NEW camshaft actuator bolt.

    Tighten:  Tighten the bolt to 85 N.m (63 lb ft), plus an additional 30 degrees using the J 45059  .

    11. Fig 6: Loosening/Tightening Camshaft Actuator Retainer Bolts
    GM2066456Courtesy of GENERAL MOTORS CORP.
  11. Remove the camshaft actuator retainer EN-48953  (1).
  12. Release the tensioner by rotating the crankshaft balancer counter clockwise.
    13. Fig 7: View Of Upper Timing Chain Guide Bolts And Guide
    GM1578296Courtesy of GENERAL MOTORS CORP.
  13. Install the upper timing chain guide and bolts.

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

  14. Install the camshaft cover. Refer to Camshaft Cover Replacement .
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