GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Engine 🢒 Engine Mechanical - 1.6L (L91) 🢒 Camshaft Gear Replacement

Removal Procedure

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


    Object Number: 1291138 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the engine cover. Refer to Engine Cover Replacement .
  3. Remove the timing belt. Refer to Timing Belt Replacement .
  4. Disconnect the ignition wires from the spark plugs.
  5. Disconnect the engine ventilation hoses from the camshaft cover.

    6. Object Number: 1291143 Size: SH
  6. Remove the camshaft cover bolts.
  7. Remove the camshaft cover and the camshaft cover gasket.

    8. Object Number: 1291233 Size: SH

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

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

Installation Procedure

    Object Number: 1291233 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 67.5 N·m (49 lb ft).

  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 67.5 N·m (49 lb ft).


    Object Number: 1291143 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 bolts.

    8. Tighten
    Tighten the camshaft cover nuts to 10 N·m (89 lb in).


    Object Number: 1291138 Size: SH
  8. Connect the engine ventilation hoses to the camshaft cover.
  9. Connect the ignition wires to the spark plugs.
  10. Install the timing belt. Refer to Timing Belt Replacement .
  11. Install the engine cover. Refer to Engine Cover Replacement
  12. Connect the negative battery cable.