Thermostat change
#2
1. Disconnect the negative battery cable.
WARNING
Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
2. Drain the cooling system.
3. Raise and safely support the vehicle.
4. Detach the electrical connectors from the engine oil and power steering pressure switches.
5. Disconnect the radiator and heater hoses from thermostat housing.
6. Remove thermostat housing bolts.
7. Remove the housing, thermostat, and gasket.
NOTE
The OEM thermostat is staked in place at the factory. To ensure proper seating of the replacement thermostat, carefully remove the bulged metal from thermostat housing using a suitable hand held grinder. It is not necessary to re-stake the replacement thermostat into thermostat housing.
Fig. Thermostat housing/coolant inlet (1), thermostat (2) and gasket (3)-3.5L engine
To install:
1. Thoroughly clean the gasket mating surfaces.
2. Position a new gasket on thermostat and housing.
3. Install thermostat housing, gasket and mounting bolts onto block. Tighten attaching bolts to 105 inch lbs. (12 Nm).
4. Install the radiator hose.
5. Install the bypass hose.
6. Connect the negative battery cable.
7. Fill the cooling system. Start and warm the engine. Check for leaks.
WARNING
Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.
2. Drain the cooling system.
3. Raise and safely support the vehicle.
4. Detach the electrical connectors from the engine oil and power steering pressure switches.
5. Disconnect the radiator and heater hoses from thermostat housing.
6. Remove thermostat housing bolts.
7. Remove the housing, thermostat, and gasket.
NOTE
The OEM thermostat is staked in place at the factory. To ensure proper seating of the replacement thermostat, carefully remove the bulged metal from thermostat housing using a suitable hand held grinder. It is not necessary to re-stake the replacement thermostat into thermostat housing.
Fig. Thermostat housing/coolant inlet (1), thermostat (2) and gasket (3)-3.5L engine
To install:
1. Thoroughly clean the gasket mating surfaces.
2. Position a new gasket on thermostat and housing.
3. Install thermostat housing, gasket and mounting bolts onto block. Tighten attaching bolts to 105 inch lbs. (12 Nm).
4. Install the radiator hose.
5. Install the bypass hose.
6. Connect the negative battery cable.
7. Fill the cooling system. Start and warm the engine. Check for leaks.