Thermostat: Service and Repair

1. Remove lower radiator hose and partially drain coolant.
2. Remove thermostat housing mounting bolts.
3. Remove thermostat and gasket from housing.
4. Clean all sealing surfaces and replace gasket.
5. Install new thermostat with ``RAD'' marking facing out and ``TOP'' marking at the top.
6. Install cover and torque bolts to 17-20 ft. lbs.
7. Add coolant, then run engine until normal operating temperature is reached.
8. Check cooling system for leaks, then add coolant if necessary.