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.
- Disconnect the engine oil cooler quick connect fittings. Refer to
Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
- If equipped with regular production option (RPO) L76 (6.0L) engine, perform the following.
2.1. | Open the oil cooler hose clip located on the lower fan shroud. |
2.2. | Remove the oil cooler hoses from the clip. |
- Raise and suitably support the vehicle. Refer to
Lifting and Jacking the Vehicle.
- If equipped with RPO LY6 (6.0L) engine, remove the oil cooler hoses from the clip.
- Place a jack or utility stands at the rear of the vehicle.
- If equipped, remove the engine protection shield. Refer to
Engine Shield Replacement.
- If equipped, remove the front differential carrier shield. Refer to
Shield Replacement.
- For both 1500 and 2500 series, support the front differential carrier with a suitable adjustable jack.
- For 1500 series vehicles, remove the differential carrier right side nuts.
- Remove the differential carrier left side bolts.
- Lower the differential carrier.
- For 2500 series vehicles, remove the differential carrier right side nuts.
- Remove the differential carrier upper mounting bolt and nut.
- Remove the differential carrier lower mounting bolt and nut.
- If equipped with RPO L76 (6.0L) engine, perform the following:
15.1. | Lower the differential carrier. |
15.2. | Remove the oil cooler hose adapter bolts (2). |
15.3. | Remove the oil cooler hose assembly and gasket. Discard the gasket. |
15.4. | Inspect the fittings, connectors, and cooler hoses for damage or distortion. |
- If equipped with RPO LY6 (6.0L) engine, perform the following:
16.1. | Remove the oil cooler hose bracket bolt. (1) |
16.2. | Remove the oil cooler hose adapter bolts. (2) |
16.3. | Remove the oil cooler hose assembly. Discard the gasket. |
16.4. | Inspect the fittings, connectors, and cooler hoses for damage or distortion. |
Installation Procedure
Caution: Refer to Fastener Caution in the Preface section.
- If equipped with RPO LY6 (6.0L) engine, perform the following:
1.1. | Install the oil cooler hose assembly and a NEW gasket. |
1.2. | Install the oil cooler hose adapter bolts (2). |
Tighten
Tighten the bolts to 12 N·m (106 lb in).
1.3. | Install the oil cooler hose bracket bolt. |
Tighten
Tighten the bolt to 25 N·m (18 lb ft).
- If equipped with a RPO L76 (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
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).
- For 2500 series vehicles, raise the differential carrier into position.
- Install the differential carrier left side upper bolt and nut until snug.
- Install the differential carrier left side lower bolt and nut until snug.
- Install the differential carrier right side nuts.
Tighten
Tighten the bolt to 100 N·m (74 lb ft).
- For 1500 series vehicles, raise the differential carrier into position.
- Install the differential carrier right side nuts.
- Install the differential carrier left side bolts.
Tighten
Tighten the bolts/nuts to 100 N·m (74 lb ft).
- If equipped, install the engine protection shield. Refer to
Engine Shield Replacement.
- Remove the jack or utility stand from the rear of the vehicle.
- Lower the vehicle.
Note:
• | 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. |
- If equipped with RPO LY6 (6.0L) engine, install the oil cooler hoses to the clip.
Note:
• | 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. |
- If equipped with RPO L76 (6.0L) engine, perform the following:
14.1. | Install the oil cooler hoses to the hose clip on the fan shroud. |
14.2. | Snap the oil cooler hose clip shut. |
- Install the oil cooler lines to the radiator. Refer to
Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.