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Home >> Pontiac >> 2004 >> Vibe GT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (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. Fig 1: Measuring Radial Clearance Between Oil Pump Outer Gear And Oil Pump Body
    GM236061Courtesy of GENERAL MOTORS CORP.
  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).

    3. Fig 2: Measuring Side Clearance Between Oil Pump Gears And Straightedge
    GM236054Courtesy 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).

    4. Fig 3: Measuring Tip Clearance
    GM236057Courtesy 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).

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