Thermostat: Service and Repair

WARNING: Do not remove pressure cap with the system hot and under pressure because serious burns from coolant can occur.

REMOVAL
1. Drain cooling system down to thermostat level or below.
2. Remove thermostat housing bolts and housing.
3. Remove thermostat, discard gasket and clean both gasket sealing surfaces.

INSTALLATION
1. Install thermostat into recess provided in the intake manifold.
2. Place a new gasket (dipped in water) on the water box surface, center thermostat into opening in the intake manifold.
3. Place housing over gasket and thermostat, bolt housing to intake manifold, torque bolts, to 28 Nm (250 in. lbs.).
4. Refill cooling system.