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Home >> Pontiac >> 2003 >> Vibe GT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Mechanical - 1.8L (LV6)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pump Cleaning and Inspection

Oil Pump Cleaning and Inspection

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  1. Inspect the following for the excessive wear or damage:
    • The oil pump outer gear
    • The oil pump inner gear
    • The oil pump cover
    • The oil pump body
  2. Measure the radial clearance between the oil pump outer gear and the oil pump body using a feeler gage.

    Replace the oil pump outer gear and/or oil pump if the clearance exceeds 0.325 mm (0.01280 in).

    Fig 1: Measuring Radial Clearance Between Oil Pump Outer Gear And Oil Pump Body
    G01546960Courtesy of GENERAL MOTORS CORP.
  3. Measure the side clearance between the oil pump gears and a straightedge using a feeler gage.

    Replace the gears if the clearance exceeds 0.16 mm (0.0062 in).

    Fig 2: Measuring Side Clearance Between Oil Pump Gears And A Straightedge
    G01546961Courtesy of GENERAL MOTORS CORP.
  4. Measure the tip clearance between the oil pump gear tips using a feeler gage.

    Replace the gears if the clearance exceeds 0.35 mm (0.0138 in).

    Fig 3: Measuring Tip Clearance Between Oil Pump Gear Tips
    G01546962Courtesy of GENERAL MOTORS CORP.
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