The thermostat is used to control the flow of engine coolant. When the engine is cold, the thermostat is closed to prevent coolant from circulating through the engine. As the engine begins to warm up, the thermostat opens to allow the coolant to flow through the radiator and cool the engine to its normal operating temperature. Fuel economy and engine durability is increased when operated at normal operating temperature.
REMOVAL & INSTALLATION
See Figures 1 through 10
- If necessary, unfasten the retainer and remove the upper engine cover.
- Disconnect the negative battery cable.
- Remove the air cleaner and duct assembly.
- Partially drain the engine cooling system, into a suitable container, to a level below the thermostat.
- Disconnect the upper radiator hose from the water outlet.
- If necessary, detach the electrical connections from the throttle body assembly.
- Unfasten the water outlet attaching bolts, then remove the water outlet.
- Remove the thermostat. Remove and discard the gasket.
- Thoroughly clean the manifold water inlet and water outlet mating surfaces. Inspect the water outlet for corrosion or other damage, and replace if necessary.
- Position the thermostat into the intake manifold with a new gasket.
- Install the water outlet to the intake manifold with RTV sealer. Tighten the attaching bolts to 20 ft. lbs. (27 Nm).
- Connect the radiator hose to the water outlet housing.
- If necessary, attach the electrical connections to the throttle body assembly.
- Install the air cleaner assembly, then connect the negative battery cable.
- Refill the engine with the specified type and amount of engine coolant. Start the engine and check for coolant leaks.