GM Service Manual Online
For 1990-2009 cars only

Special Tools

KM-470-B Angular Torque Gage

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1758495  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the engine beautification cover.
  3. Disconnect the ignition wires from the spark plugs.
  4. Disconnect the breather hose and PCV hose from the cylinder head cover.

  5. Object Number: 1758498  Size: SH
  6. Remove the camshaft cover. Refer to Camshaft Cover Replacement.

  7. Object Number: 1758524  Size: SH

    Note: Handle the camshafts carefully to prevent nicks or scratches.

  8. Remove the timing belt. Refer to Timing Belt Replacement.
  9. While holding the intake camshaft firmly in place, remove the intake camshaft gear bolt.
  10. Remove the intake camshaft gear.
  11. While holding the exhaust camshaft firmly in place, remove the exhaust camshaft gear bolt.
  12. Remove the exhaust camshaft gear.
  13. Remove the camshaft position (CMP) sensor.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1758671  Size: SH
  1. Install the CMP sensor and tighten the bolt to 8 N·m (71 lb in).

  2. Object Number: 1758524  Size: SH

    Note: Handle the camshafts carefully to prevent nicks or scratches.

  3. Install the intake camshaft gear.
  4. While holding the intake camshaft firmly in place, install a new intake camshaft gear bolt and tighten to 50 N·m (37 lb ft) plus 60 degrees and 15 degrees using KM-470-B angular torque gage .
  5. Install the exhaust camshaft gear.
  6. While holding the exhaust camshaft firmly in place, install a new exhaust camshaft gear bolt and tighten to 50 N·m (37 lb ft) plus 60 degrees and 15 degrees using KM-470-B gage .

  7. Object Number: 1758498  Size: SH
  8. Install the timing belt. Refer to Timing Belt Replacement.
  9. Apply a small amount of gasket sealant to the corners of the front camshaft caps and to the top of the rear cylinder head cover-to-cylinder head seal.
  10. Install the camshaft cover and tighten the bolts to 8 N·m (71 lb in). Refer to Camshaft Cover Replacement.

  11. Object Number: 1758495  Size: SH
  12. Connect the breather hose and PCV hose to the cylinder head cover.
  13. Connect the ignition wires to the spark plugs.
  14. Install the engine beautification cover and tighten the nuts and bolts to 8 N·m (71 lb in).
  15. Connect the negative battery cable.