Engine Coolant Thermostat - Removal

5.7L ENGINE





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 until the coolant level is below the thermostat Service and Repair
3. Air Conditioned vehicles: Remove the support bracket (generator mounting bracket-to-intake manifold) (2) located near the rear of the generator.

NOTE: On air conditioning equipped vehicles, the generator must be partially removed.

4. Remove the accessory drive belt Accessory Drive Belt - Removal.
5. Remove the generator mounting bolts. Do not remove any of the wiring at the generator. If equipped with 4WD, unplug the 4WD indicator lamp wiring harness (located near rear of generator).
6. Remove the generator. Position the generator to gain access for the thermostat gasket removal.
7. Remove the radiator upper hose clamp and upper hose at the thermostat housing.
8. Position the wiring harness (behind thermostat housing) to gain access to the thermostat housing.




9. Remove the thermostat housing mounting bolts, thermostat housing (1), gasket ( 2) and thermostat (3). Discard old gasket (3).