GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Engine 🢒 Engine Mechanical - 2.0L (L34 GMDAT) 🢒 Oil Pump Cleaning and Inspection

Cleaning Procedure

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


    Object Number: 1252151 Size: SH
  1. Clean the oil pump and the engine block gasket mating surfaces 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: 1252148 Size: SH
  5. Remove the oil pump rear cover bolts.
  6. Remove the rear cover.
  7. Clean the oil pump housing and all of the parts.

Inspection Procedure

    Object Number: 1252148 Size: SH
  1. Inspect all parts for signs of wear. Refer to Engine Mechanical Specifications .
  2. Coat all oil pump parts with clean engine oil and install.

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

    Important: Pack the oil pump gear cavity with petroleum jelly to ensure the oil pump primes.

  3. Apply LOCTITE® 242 to the rear cover bolts and install the cover and the bolts.

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

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

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