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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Oil Pump Cleaning and Inspection >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Oil Pump Housing Inspection Points
    GM902924Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.
  1. Inspect the oil pump housing for damage.
    2. Fig 2: Inspecting Oil Pump Cover
    GM902925Courtesy of GENERAL MOTORS CORP.
  2. Inspect the oil pump cover for damage.
    3. Fig 3: Inspecting Inner Drive Gear
    GM902926Courtesy of GENERAL MOTORS CORP.
  3. Inspect the inner drive gear for damage. If inner diameter damage is found, ensure the crankshaft is also inspected.
    4. Fig 4: Inspecting Outer Drive Gear
    GM902927Courtesy of GENERAL MOTORS CORP.
  4. Inspect the outer driven gear for damage.
    5. Fig 5: Identifying Oil Pump Relief Valve Components
    GM902929Courtesy of GENERAL MOTORS CORP.
  5. Inspect the oil pump relief valve components for debris or damage.
    6. Fig 6: Identifying Primary Camshaft Drive Chain Lower Guide
    GM902930Courtesy of GENERAL MOTORS CORP.
  6. Inspect the primary camshaft drive chain lower guide for damage. If replacement of the primary camshaft drive chain lower guide is necessary, replace the entire oil pump assembly. The primary camshaft drive chain lower guide is not serviceable separately.
  7. If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.
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