GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 45059 Torque Angle Meter

Removal Procedure

  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .

  2. Object Number: 36603  Size: SH
  3. Align the timing marks on the timing sprockets. Position the timing marks as close together as possible.

  4. Object Number: 153596  Size: SH
  5. Remove the timing chain dampener.
  6. Remove the camshaft sprocket bolt.
  7. Remove the camshaft sprocket.
  8. Remove the timing chain.
  9. Clean and inspect the timing chain and sprockets. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection .

Installation Procedure


    Object Number: 36603  Size: SH
  1. Turn the crankshaft so that the number one piston is at top dead center.
  2. Turn the camshaft so that the timing mark is straight down with the sprocket temporarily installed.
  3. Assemble the timing chain on the sprockets. Ensure that the timing marks are in the closest together position.

  4. Object Number: 153596  Size: SH
  5. Install the timing chain and the crankshaft sprocket.
  6. Install the camshaft sprocket.
  7. Notice: Refer to Special Fastener Notice in the Preface section.

    Notice: Refer to Fastener Notice in the Preface section.

  8. Install the camshaft sprocket bolt.
  9. Tighten
    Tighten the camshaft sprocket bolt to 100 N·m (74 lb ft). Use the J 45059 in order to tighten the bolt an additional 90 degrees.

  10. Install the timing chain dampener.
  11. Install the timing chain dampener bolt.
  12. Tighten
    Tighten the timing chain dampener bolt to 22 N·m (16 lb ft).

  13. Install the engine front cover. Refer to Engine Front Cover Replacement .