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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2006 🢒 Escalade ESV 🢒 Engine 🢒 Engine Cooling 🢒 Engine Oil Cooler Hose/Pipe Replacement

Engine Oil Cooler Hose/Pipe Replacement 2WD

Removal Procedure

The optional oil cooler is either an integral part of the radiator or a separate unit placed in front of the radiator. The cooler lines and hoses are serviceable.


    Object Number: 1486208 Size: SH
  1. Disconnect the engine oil cooler quick connect fittings. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting .
  2. If equipped with a 5.3L or 6.0L engine, perform the following:
    3. 2.1. Open the oil cooler hose clip located on the lower fan shroud.
    2.2. Remove the oil cooler hoses from the clip.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    4. Object Number: 721990 Size: SH
  4. If equipped with a 8.1L engine, perform the following:
  5. Remove the oil cooler hoses from the clip.
  6. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    7. Object Number: 349061 Size: SH
  7. If equipped, remove the engine shield bolts.
  8. Remove the engine shield.

    9. Object Number: 688324 Size: SH
  9. If equipped with a 5.3L or 6.0L engine, perform the following:
    10. 9.1. Remove the oil cooler hose bracket bolt (1).
    9.2. Remove the oil cooler hose adapter bolts (2).
    9.3. Remove the oil cooler hose assembly and gasket. Discard the gasket.
    9.4. Inspect the fittings, connectors and cooler hoses for damage or distortion.

    Object Number: 721991 Size: SH
  10. If equipped with a 8.1L engine, perform the following:
    11. 10.1. Remove the oil cooler hose bracket bolt.
    10.2. Disconnect the quick connect fittings (1) at the engine.
    10.3. Remove the oil cooler hose assembly. Discard the gasket.
    10.4. Inspect the fittings, connectors and cooler hoses for damage or distortion.

Installation Procedure

    Object Number: 721991 Size: SH

    Important: A distinct snap should be heard when assembling the tube ends of the hose assembly to quick connectors. To ensure the tube is fully inserted into the connector, check by giving the tube a forceful pull.

  1. If equipped with a 8.1L engine, perform the following:
    2. 1.1. Remove the oil cooler hose assembly.
    1.2. Connect the quick connect fittings (1) at the engine.

    Notice: Refer to Fastener Notice in the Preface section.

    1.3. Install the oil cooler hose bracket bolt.

    Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 688324 Size: SH
  2. If equipped with a 5.3L or 6.0L engine, perform the following:
    3. 2.1. Install the oil cooler hose assembly and a new gasket.
    2.2. Install the oil cooler hose adapter bolts (2).

    Tighten
    Tighten the bolts to 12 N·m (106 lb in).

    2.3. Install the oil cooler hose bracket bolt (1).

    Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 349061 Size: SH
  3. If equipped, install the engine shield.
  4. Install the engine shield bolts.

    5. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).


    Object Number: 721990 Size: SH

    Important: 

       • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
       • Do not use the plastic cap in order to install the cooler line into the fitting.

  5. If equipped with a 8.1L engine perform the following:
  6. Install the oil cooler hoses to the clip.

    7. Object Number: 367011 Size: SH

    Important: 

       • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
       • Do not use the plastic cap in order to install the cooler line into the fitting.

  7. If equipped with a 5.3L or 6.0L engine, perform the following:
    8. • Install the oil cooler hoses to the hose clip on the fan shroud.
    • Snap the oil cooler hose clip shut.
  8. Install the oil cooler lines to the radiator. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting .

Engine Oil Cooler Hose/Pipe Replacement 4WD

Removal Procedure

The optional oil cooler is either an integral part of the radiator or a separate unit placed in front of the radiator. The cooler lines and hoses are serviceable.


    Object Number: 1486208 Size: SH
  1. Disconnect the engine oil cooler quick connect fittings. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting .
  2. If equipped with a 5.3L or 6.0L engine, perform the following:
    3. 2.1. Open the oil cooler hose clip located on the lower fan shroud.
    2.2. Remove the oil cooler hoses from the clip.
  3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

    4. Object Number: 721990 Size: SH
  4. If equipped with a 8.1L engine, perform the following:
  5. Remove the oil cooler hoses from the clip.
  6. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  7. Place a jack or utility stands at the rear of the vehicle.
  8. If equipped, remove the engine protection shield. Refer to Engine Protection Shield Replacement .
  9. If equipped, remove the front differential carrier shield. Refer to Shield Replacement .

    10. Object Number: 834241 Size: SH
  10. Place an adjustable jack under the front differential carrier.
  11. Remove the inner axle housing nuts and washers from the bracket.

    12. Object Number: 834276 Size: SH
  12. Remove the differential carrier upper mounting bolt and nut.
  13. Pivot the differential carrier forward and down on the lower mount bolt while it is being supported by the adjustable jack.
  14. Secure the differential carrier to the jack.

    15. Object Number: 834278 Size: SH
  15. Remove the differential carrier lower mounting bolt and nut.
  16. Lower the jack 4-6 inches.

    17. Object Number: 688324 Size: SH
  17. If equipped with a 5.3L or 6.0L engine, perform the following:
    18. 17.1. Remove the oil cooler hose bracket bolt (1).
    17.2. Remove the oil cooler hose adapter bolts (2).
    17.3. Remove the oil cooler hose assembly and gasket. Discard the gasket.
    17.4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.

    Object Number: 721991 Size: SH
  18. If equipped with a 8.1L engine, perform the following:
    19. 18.1. Remove the oil cooler hose bracket bolt.
    18.2. Disconnect the quick connect fittings (1) at the engine.
    18.3. Remove the oil cooler hose assembly. Discard the gasket.
    18.4. Inspect the fittings, connectors, and cooler hoses for damage or distortion.

Installation Procedure

    Object Number: 721991 Size: SH

    Important: A distinct snap should be heard when assembling the tube ends of the hose assembly to quick connectors. To ensure the tube is fully inserted into the connector, check by giving the tube a forceful pull.

  1. If equipped with a 8.1L engine, perform the following:
    2. 1.1. Remove the oil cooler hose assembly and a NEW gasket.
    1.2. Connect the quick connect fittings  (1) at the engine.

    Notice: Refer to Fastener Notice in the Preface section.

    1.3. Install the oil cooler hose bracket bolt.

    Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 688324 Size: SH
  2. If equipped with a 5.3L or 6.0L engine, perform the following:
    3. 2.1. Install the oil cooler hose assembly and a NEW gasket.
    2.2. Install the oil cooler hose adapter bolts (2).

    Tighten
    Tighten the bolts to 12 N·m (106 lb in).

    2.3. Install the oil cooler hose bracket bolt (1).

    Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 834278 Size: SH
  3. Raise the jack in order to position the differential carrier.
  4. Install the differential carrier lower mounting bolt and nut while it is being supported by the jack.
  5. Pivot the differential carrier up and back on the lower mount bolt while it is being supported by the jack.

    6. Object Number: 834276 Size: SH
  6. Install the differential carrier upper mounting bolt and nut. Do not tighten the bolt at this time.

    7. Object Number: 834241 Size: SH
  7. Install the inner axle housing washers and nuts to the brackets.

    8. Tighten

        • The inner axle housing bolts to 100 N·m (75 lb ft).
        • The upper and lower differential carrier bolts to 100 N·m (75 lb ft).
  8. Remove the adjustable jack from under the front differential carrier.
  9. If equipped, install the front differential carrier shield. Refer to Shield Replacement .
  10. If equipped, install the engine protection shield. Refer to Engine Protection Shield Replacement .
  11. Remove the jack or utility stand from the rear of the vehicle.
  12. Lower the vehicle.

    13. Object Number: 721990 Size: SH

    Important: 

       • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
       • Do not use the plastic cap in order to install the cooler line into the fitting.

  13. If equipped with a 8.1L engine, perform the following:
  14. Install the oil cooler hoses to the clip.

    15. Object Number: 367011 Size: SH

    Important: 

       • Ensure the oil cooler line being installed has a plastic cap on the end that connects to the quick connect fitting. If no plastic cap exists, or the plastic cap is damaged, obtain a new cap. Install the cap onto the cooler line prior cooler line installation.
       • Do not use the plastic cap in order to install the cooler line into the fitting.

  15. If equipped with a 5.3L or 6.0L engine, perform the following:
    16. 15.1. Install the oil cooler hoses to the hose clip on the fan shroud.
    15.2. Snap the oil cooler hose clip shut.
  16. Install the oil cooler lines to the radiator. Refer to Engine Oil Cooler Pipe/Hose Quick Connect Fitting .