GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Preface 🢒 Cautions and Notices 🢒 Camshaft Gear Replacement

Removal Procedure

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


    Object Number: 1289763 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the timing belt. Refer to Timing Belt Replacement .
  3. Remove the spark plug cover bolts.
  4. Remove the spark plug cover.
  5. Disconnect the ignition wires from the spark plugs.
  6. Disconnect the breather tubes from the camshaft cover.

    7. Object Number: 1289764 Size: SH
  7. Remove the camshaft cover bolts.
  8. Remove the camshaft cover washers.
  9. Remove the camshaft cover and the camshaft cover gasket.

    10. Object Number: 1289774 Size: SH

    Important: Take extreme care to prevent any scratches, nicks or damage to the camshafts.

  10. While holding the intake camshaft firmly in place, remove the intake camshaft gear bolt.
  11. Remove the intake camshaft gear.
  12. While holding the exhaust camshaft firmly in place, remove the exhaust camshaft gear bolt.
  13. Remove the exhaust camshaft gear.

Installation Procedure

    Object Number: 1289774 Size: SH

    Important: Take extreme care to prevent any scratches, nicks or damage to the camshafts.

  1. Install the intake camshaft gear.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. While holding the intake camshaft firmly in place, install the intake camshaft gear bolt.

    3. Tighten
    Tighten the intake camshaft gear bolt to 50 N·m (37 lb ft) plus 60 degrees and 15 degrees.

  3. Install the exhaust camshaft gear.
  4. While holding the exhaust camshaft firmly in place, install the exhaust camshaft gear bolt.

    5. Tighten
    Tighten the exhaust camshaft gear bolt to 50 N·m (37 lb ft) plus 60 degrees and 15 degrees.


    Object Number: 1289764 Size: SH
  5. Apply a small amount of gasket sealant to the corners of the front camshaft caps and to the top of the rear camshaft cover-to-cylinder head seal.
  6. Install the camshaft cover and the camshaft cover gasket.
  7. Install the camshaft cover washers.
  8. Install the camshaft cover bolts.

    9. Tighten
    Tighten the camshaft cover bolts to 8 N·m (71 lb in).


    Object Number: 1289763 Size: SH
  9. Connect the crankcase breather tubes to the camshaft cover.
  10. Connect the ignition wires to the spark plugs.
  11. Install the spark plug cover.
  12. Install the spark plug cover bolts.

    13. Tighten
    Tighten the spark plug cover bolts to 8 N·m (71 lb in).

  13. Install the timing belt. Refer to Timing Belt Replacement .
  14. Connect the negative battery cable.