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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 77 (Engine Mechanical - 4.6L - 3 Of 4) >> Off-Vehicle Repair Instructions (2 Of 3) >> Oil Pump Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View of Oil Pump Components
    GM71393Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The internal parts of the oil pump are not serviced separately. If wear or damage is noted, replace the entire pump assembly.
  1. Clean the oil pump components with non-corrosive solvent.
  2. Inspect the housing (1) and the cover (6) for cracks, scoring, casting imperfections and damaged threads.
  3. Inspect the gerotor gears (5) for chipping, galling or wear.
  4. Inspect the pressure relief valve (2) for embedded particles and/or damage.
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