GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Engine 🢒 Engine Mechanical - 3.0L 🢒 Engine Oil Cooler Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the intake plenum. Refer to Intake Plenum Replacement .
  3. Remove the intake manifold. Refer to Intake Manifold Replacement .

    4. Object Number: 142010 Size: SH
  4. Disconnect the following electrical connectors from the water crossover:
    5. • The engine coolant temperature sender (2)
    • The engine coolant temperature sensor (4)

    Object Number: 142013 Size: MH
  5. Remove the water crossover bolts and upper seals (2).
  6. Remove the water crossover and lower seals (2).

    7. Object Number: 159182 Size: SH
  7. Loosen the upper heat shield bolts on the LH side of the exhaust manifold .

    8. Object Number: 159490 Size: SH
  8. Remove the oil feed line from the engine oil cooler.
  9. Remove the return line from the engine oil cooler.

    10. Object Number: 159495 Size: MH
  10. Note the positioning of the four seals.
  11. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  12. Remove the left side catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.
  13. Remove the oil filter cartridge housing from the engine block.

    14. Object Number: 21512 Size: SH
  14. Remove the crank position sensor (CKP) bolt.
  15. Remove the CKP sensor (1).

    16. Object Number: 159492 Size: SH
  16. Remove the oil feed line from the engine block.
  17. Remove the return line from the engine block.
  18. Lower the vehicle.

    19. Object Number: 159494 Size: SH
  19. Position the oil feed and return lines out of the way and secure with mechanic wire.
  20. Remove the engine oil cooler inlet and outlet nuts (1).
  21. Remove the engine oil cooler cover bolts (2).

    22. Object Number: 159495 Size: MH
  22. Remove the engine oil cooler cover.
  23. Remove the engine oil cooler.
  24. Clean all sealing surfaces.

Installation Procedure
  1. Install the engine oil cooler.

    2. Object Number: 159496 Size: SH
  2. Apply a 2 mm (0.08 in) bead of RTV silicone sealant, GM P/N 12346240, in the groove around the engine oil cooler cover in place of the old seal.
  3. Install the engine oil cooler cover.

    4. Object Number: 159494 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.

  4. Install the engine oil cooler cover bolts (2).

    5. Tighten
    Tighten the engine oil cooler cover bolts to 30 N·m (22 lb ft).

  5. Install the engine oil cooler inlet and outlet nuts (1).

    6. Tighten
    Tighten the engine oil cooler inlet and outlet nuts to 20 N·m (15 lb ft).

  6. Reposition the oil feed and return lines.

    7. Object Number: 159492 Size: SH
  7. Raise and support the vehicle.
  8. Install the oil feed line to the engine block.

    9. Tighten
    Tighten the oil feed line to 30 N·m (22 lb ft).

  9. Install the return line to the engine block.

    10. Tighten
    Tighten the return line to 30 N·m (22 lb ft).


    Object Number: 21512 Size: SH
  10. Install the CKP sensor (1).
  11. Install the CKP sensor bolt.

    12. Tighten
    Tighten the CKP sensor bolt to 8 N·m (71 lb in).

  12. Install the oil filter cartridge housing to the engine block.

    13. Tighten
    Tighten the oil filter cartridge housing to 15 N·m (11 lb ft).

  13. Install the left side catalytic converter. Refer to Catalytic Converter Replacement in Engine Exhaust.
  14. Lower the vehicle.

    15. Object Number: 159495 Size: MH
  15. Install the oil feed and install the return lines to the engine oil cooler.

    16. Use four new seals.

    Tighten
    Tighten the oil feed and return lines to 30 N·m (22 lb ft).

  16. Coat the exhaust manifold heat shield bolts with high temperature nickel anti-seize lubricant, GM P/N 12371386 or equivalent.
  17. Install the upper heat shield bolts on the left side of the exhaust manifold.

    18. Tighten
    Tighten the heat shield bolts to 8 N·m (71 lb in).


    Object Number: 142013 Size: MH
  18. Install the water crossover:
    19. • Position the crossover.
    • Slide the upper seals (2) onto the bolts.
    • Insert the bolts (1) into the crossover.
    • Slide the lower seals (2) under the crossover and onto the bolts.

    Tighten
    Tighten the bolts to 30 N·m (22 lb ft).

  19. Connect the electrical connectors at the following locations:
    20. • The engine coolant temperature sensor (4)
    • The engine coolant temperature sender (2)
  20. Install the intake manifold. Refer to Intake Manifold Replacement .
  21. Install the intake plenum. Refer to Intake Plenum Replacement .
  22. Connect the negative battery cable.
  23. Reprogram the applicable accessories. Refer to Reprogramming Accessories After Battery Disconnect in Engine Electrical.
  24. Fill the engine oil as necessary. Refer to Approximate Fluid Capacities .