Thermostat: Service and Repair

1. Disconnect battery negative cable.
2. With engine cool, drain engine coolant below thermostat level.
3. Disconnect radiator hose from thermostat housing.
4. Loosen coolant bypass hose clamp.
5. Remove thermostat housing retaining bolts, then the housing, gasket and thermostat.
6. Reverse procedure to install noting the following:
a. Ensure thermostat gasket sealing surface is clean.
b. Install thermostat with new gasket.
c. Tighten thermostat housing retaining bolts to specifications.
d. Refill and bleed cooling system as needed.