Oil Line: Service and Repair
Engine Oil Cooler Hose/Pipe Replacement (6.0L and 8.1. Engines)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.
1. Disengage the plastic caps from the quick connect fittings. Pull the caps back along the pipe.
2. Hold one leg of the retaining clip.
3. Using a small pick-type tool or, bent screwdriver, gently pry the other end of the retaining clip from the quick connect fitting.
4. Rotate the retaining clip out of the quick connect fitting. Remove the retaining clip completely.
5. Discard the OLD retaining clip.
6. If equipped with a 6.OL engine, perform the following:
6.1. Open the oil cooler hose clip located on the lower fan shroud.
6.2. Remove the oil cooler hoses from the clip.
6.3. Gently, pull the oil cooler pipe fittings straight out from the radiator quick connect fittings.
6.4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
7. If equipped with a 8.1. engine, perform the following:
7.1. Remove the oil cooler hoses from the clip.
7.2. Gently, pull the oil cooler pipe fittings straight out from the radiator quick connect fittings.
7.3. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
8. It equipped, remove the engine shield bolts.
9. Remove the engine shield.
10. If equipped with the a 6.0L engine, perform the following:
10.1. Remove the oil cooler hose bracket bolt (1).
10.2. Remove the oil cooler hose adapter bolts (2).
10.3. Remove the oil cooler hose assembly and gasket.
Discard the gasket.
10.4. Inspect the fittings, connectors and cooler hoses for damage or distortion.
11. If equipped with a 8.1. engine, perform the following:
11.1. Remove the oil cooler hose bracket bolt.
11.2. Disconnect the quick connect fittings (1) at the engine.
11.3. Remove the oil cooler hose assembly. Discard the gasket.
11.4. Inspect the fittings, connectors and cooler hoses for damage or distortion.
Installation Procedure
Important: A distinct snap should be heard when assembling tube ends of the hose assembly to quick connectors. To ensure tube is fully inserted into the connector, check by giving tube a forceful pull.
1. If equipped with a 8.1. engine, perform the following:
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 Cautions and Notices.
1.3. Install the oil cooler hose bracket bolt.
- Tighten the bolt to 50 Nm (37 ft. lbs.).
2. If equipped with a 6.0L engine, perform the following:
2.1. Install the oil cooler hose assembly and a new gasket.
2.2. Install the oil cooler hose adapter bolts (2).
- Tighten the bolts to 12 Nm (106 inch lbs.).
2.3. Install the oil cooler hose bracket bolt (1).
- Tighten the bolt to 25 Nm (18 ft. lbs.).
3. If equipped, install the engine shield.
4. Install the engine shield bolts.
- Tighten the bolts to 20 Nm (15 ft. lbs.).
5. Do not install the new retaining clip onto the fitting by pushing on the clip.
Important: Failure to properly install the retaining clip could cause the cooler line to come loose and cause damage to the engine.
6. Install the NEW retaining clip into the quick connect fitting by using your thumb and forefinger. Insert the new retaining clip into one of the three fitting recesses. Ensure that the retaining clip is engaged in all 3 slots.
7. With one end of the retaining clip engaged in the connector fitting slot, use your thumb in order to rotate the retaining clip around the connector fitting, until the retaining clip snaps into place.
8. Ensure that the 3 retaining clip ears are seen from inside the fitting and that the retaining clip moves freely in the fitting slots.
9. Install a new retaining clip into the remaining quick connect fitting.
10. If equipped with a 6.01L engine, perform the following:
10.1. Install the oil cooler hoses to the hose clip on the fan shroud.
10.2. Snap the oil cooler hose clip shut.
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 on to the cooler line prior to cooler line installation.
- Do not use the plastic cap in order to install the cooler line into the fitting.
11. If equipped with a 8.1. engine, perform the following:
11.1. Install the oil cooler hoses to the clip.
11.2. Install the oil cooler lines to the radiator. Install the cooler line straight into the quick connect fitting.
Insert the cooler line end into the quick connect fitting until a click is either heard or felt.
11.3. Pull back sharply on the cooler line in order to ensure that the cooler line is installed in the quick connect fitting.
Important: Do not manually depress the retaining clip when installing the plastic cap.
12. Snap the plastic cap onto the quick connect fitting.
13. Ensure that the plastic cap is fully seated against the fitting.
14. Ensure that no gap is present between the cap and the fitting.
15. Ensure that the yellow identification band on the tube is hidden within the quick connect fitting. A hidden yellow identification band indicates proper joint seating.
16. Run the engine. Inspect the engine oil cooling system for leaks.
17. Inspect the engine oil level. Add oil if necessary.