GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 DeVille 🢒 Engine 🢒 Engine Cooling 🢒 Engine Oil Cooler Hose/Pipe Replacement

Removal Procedure
  1. Remove the upper filler panel. Refer to Filler Panel Replacement - Upper in Body Front End.

    2. Object Number: 518549 Size: SH
  2. Disconnect the upper engine oil cooler pipe from the radiator.
  3. Remove the front air deflector. Refer to Front Air Deflector Replacement in Body Front End.

    4. Object Number: 518548 Size: SH
  4. Remove the engine oil cooler pipe retaining bolt and retainer from the fan shroud.

    5. Object Number: 518549 Size: SH
  5. Disconnect the lower engine oil cooler pipe from the radiator.

    6. Object Number: 597382 Size: SH

    Important: Engine oil cooler quick connect fittings must be replaced whenever they are removed from the engine oil filter adapter.

  6. Remove the engine oil cooler quick connect fittings from the engine oil filter adapter, with the oil pipes still attached.
  7. Remove the engine oil cooler pipes from the vehicle.
  8. Slide the plastic cap off the quick connect joint.

    9. Object Number: 289543 Size: SH
  9. Remove the internal spring clips from the engine oil cooler fittings.

    10. Object Number: 289546 Size: SH
  10. Remove the engine oil cooler pipes from the cooler fittings.

Installation Procedure

    Object Number: 518550 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Important: Engine oil cooler quick connect fittings must be replaced whenever they are removed from the engine oil filter adapter.

  1. Install the new engine oil cooler quick connect fittings to the engine oil filter adapter.

    2. Tighten
    Tighten the engine oil cooler quick connect fittings to 18 N·m (13 lb ft).


    Object Number: 518551 Size: SH
  2. Push the engine oil cooler pipes fully into the new engine oil cooler quick connect fittings, until a "click" is heard.
  3. Tug gently on the cooler pipes to ensure proper retention.
  4. Slide the plastic cap over the quick connect joint.

    5. Object Number: 518549 Size: SH
  5. Install the lower engine oil cooler pipe to the radiator.

    6. Tighten
    Tighten the engine oil cooler pipe fitting to 18 N·m (13 lb ft).


    Object Number: 518548 Size: SH
  6. Install the engine oil cooler pipe retaining clip and bolt to the fan shroud.

    7. Tighten
    Tighten the engine oil cooler pipe retaining bolt to 6 N·m (53 lb in).

  7. Install the front air deflector. Refer to Front Air Deflector Replacement in Body Front End.
  8. Lower the vehicle.

    9. Object Number: 518549 Size: SH
  9. Connect the upper engine oil cooler pipe to the radiator.

    10. Tighten
    Tighten the engine oil cooler pipe fitting to 18 N·m (13 lb ft).

  10. Install the upper filler panel. Refer to Filler Panel Replacement - Upper in Body Front End.
  11. Inspect the engine oil level.