REMOVAL
3.7L/4.7L
WARNING: Do not loosen radiator draincock with system hot and pressurized. Serious burns from coolant can occur.
Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse.
If thermostat is being replaced, be sure that replacement is specified thermostat for vehicle model and engine type.
1. Disconnect negative battery cable at battery.
2. Drain cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
3. Raise vehicle on hoist.
4. Remove splash shield.
5. Remove lower radiator hose clamp and lower radiator hose at thermostat housing.
6. Remove thermostat housing mounting bolts, thermostat housing and thermostat.
5.7L
WARNING: Do not loosen the radiator draincock with the cooling system hot and pressurized. Serious burns from the coolant can occur.
Do not waste reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.
If the thermostat is being replaced, be sure that the replacement is the specified thermostat for the vehicle model and engine type.
1. Disconnect the negative battery cable.
2. Drain the cooling system
3. Remove the radiator hose clamp and radiator hose at the thermostat housing (1).
4. Remove the thermostat housing mounting bolts (2), thermostat housing (1) and thermostat.
3.0L DIESEL
WARNING: Risk of injury to skin and eyes from scalding with hot coolant . Risk of poisoning from swallowing coolant. Do not open cooling system unless coolant temperature is below 90°C (194°f). Open cap slowly to release pressure. Store coolant in suitable and appropriately marked container. Wear protective gloves, clothes and eye wear.
NOTE: Inspect condition of all clamps and hoses, replace as necessary.
1. Disconnect negative battery cable.
2. Remove engine cover (Refer to 9 - ENGINE - REMOVAL).
3. Drain engine coolant (Refer to 7 - COOLING/ENGINE/COOLANT - STANDARD PROCEDURE).
4. Remove bracket for fuel line.
5. Remove coolant hoses and vent hose from thermostat housing.
6. Remove thermostat housing.
7. Clean all sealing surfaces.