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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Repair Instructions >> Engine Oil Cooler Hose/Pipe Replacement (4WD) >> Removal Procedure

Removal Procedure

  1. Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
  2. Remove the steering linkage shield bolts and washers.
  3. Remove the steering linkage shield.
    Fig 1: Steering Linkage Shield, Bolts & Washers (4WD)
    G01661416Courtesy of GENERAL MOTORS CORP.

    Important:  Have a drain pan ready for the engine oil to drain into.

  4. Remove the bolt attaching the engine oil cooler lines to the remote (frame mounted) oil filter adapter.
  5. Remove and discard the seals.
    Fig 2: Engine Oil Cooler Lines At Remote Oil Filter Adapter (4WD)
    G01661417Courtesy of GENERAL MOTORS CORP.
  6. Lower vehicle.
  7. Remove air cleaner assembly.
  8. Remove the engine oil cooler line retaining rings from the engine oil cooler line quick connectors at the radiator engine oil cooler inlet and outlet. Follow the next 2 steps for the proper retaining ring removal procedure.
    Fig 3: Engine Oil Cooler Line Retaining Rings (4WD)
    G01661418Courtesy of GENERAL MOTORS CORP.
  9. Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring.
  10. Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed.

    Discard the retaining rings.

    Fig 4: Pulling End Of Retaining Ring Using Bent-Tip Screwdriver (4WD)
    G01661419Courtesy of GENERAL MOTORS CORP.
  11. Remove the engine oil cooler lines from the quick connectors at the radiator engine oil cooler inlet and outlet.

    Pull the lines straight out from the connectors.

    Fig 5: Engine Oil Cooler Lines At Radiator (4WD)
    G01661420Courtesy of GENERAL MOTORS CORP.
  12. Remove engine oil cooler lines from the vehicle.

    Important:  Have a drain pan ready for the engine oil to drain into.

  13. Remove the bolt attaching the remote engine oil filter lines to the remote (frame mounted) engine oil filter adapter.
  14. Hold the remote engine oil filter lines below the remote engine oil filter lines (engine mounted) adapter to drain the engine oil.
  15. Remove and discard the seals.
    Fig 6: Remote Engine Oil Filter Lines At Remote Engine Oil Filter Adapter (Frame Mounted)
    G01661421Courtesy of GENERAL MOTORS CORP.
  16. Remove the bolt attaching the remote engine oil filter lines to the remote engine oil filter lines (engine mounted) adapter.
  17. Remove and discard the seals.
  18. Clean all of the components in a suitable solvent, and dry them with compressed air.
  19. Inspect the fittings, the connectors, the cooler lines, the cooler, the filter lines, and the remote filter adapter for damage, distortion, or restriction. Replace parts as necessary.
  20. Flush the engine oil cooler, the engine oil cooler lines, the remote engine oil filter adapter, and the remote engine oil filter lines with the same type of engine oil normally circulating through the engine.
    Fig 7: Remote Engine Oil Filter Lines At Remote Engine Oil Filter Adapter (Engine Mounted)
    G01661422Courtesy of GENERAL MOTORS CORP.
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