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Home >> Chevrolet >> 2005 >> Optra5 LS, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine Mechanical - 1.6L (L91) >> Repair Instructions >> Oil Pump Cleaning and Inspection

Oil Pump Cleaning and Inspection

    Fig 1: View Of Oil Pump At Crankshaft
    GM1291326Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  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. Fig 2: View Of Oil Pump With Rear Cover Removed
    GM1291330Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil pump rear cover bolts.
  6. Remove the oil pump rear cover bolts.
    7. Fig 3: View Of Oil Pump With Rear Cover Removed
    GM1291330Courtesy of GENERAL MOTORS CORP.
  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. NOTE: 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. NOTE: Refer to Fastener Notice in Cautions and Notices.
  10. Apply Loctite® 242 to the oil pump rear cover bolts and install the cover and bolts.

    Tighten:  Tighten the oil pump rear cover bolts to 8 N.m (71 lb in)  .

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

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

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