GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Engine 🢒 Engine Mechanical - 1.8L (L79) 🢒 Oil Pump Cleaning and Inspection

    Caution: Refer to Safety Glasses Caution in the Preface section.


    Object Number: 1289830 Size: SH
  1. Clean the oil pump and the engine block gasket mating surface areas.
  2. Remove the safety relief valve bolt.
  3. Remove the safety relief valve and the spring.
  4. Remove the oil pump-to-crankshaft seal.

    5. Object Number: 1289831 Size: SH
  5. Remove the oil pump rear cover bolts.
  6. Remove the rear cover.
  7. Clean the oil pump housing and all the oil pump parts.
  8. Inspect all the oil pump parts for signs of wear. Refer to Engine Mechanical Specifications . Replace the worn oil pump parts.

    9. Notice: Fill oil pump cavities with petroleum jelly prior to installation. This will ensure that there is oil pressure immediately on start-up and will prevent engine damage.

  9. Coat all the oil pump parts with clean engine oil Install the oil pump parts.

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

  10. Apply Loctite® 242 to the oil pump rear cover bolts and install the cover and bolts.

    11. Tighten
    Tighten the oil pump rear cover bolts to 6 N·m (53 lb in).

  11. Install the safety relief valve, spring, washer and bolt.

    12. Tighten
    Tighten the safety relief valve bolt to 30 N·m (22 lb ft).