Thermostat: Service and Repair

Left Thermostat
1. With engine cold, remove cooling pressure caps from engine and coolant reservoir tank.
2. Loosen system bleed tap from lefthand side of radiator top rail.
3. Disconnect lower radiator hose and partially drain coolant.
4. Disconnect top radiator hose from thermostat housing.
5. Remove three thermostat housing bolts. Loosen air cleaner mounting bracket upper nut and remove bracket from thermostat housing.
6. Remove thermostat and gasket.
7. Reverse procedure to install, noting the following:
a. Torque thermostat housing bolts to 17-20 ft.lbs.
b. Slowly fill cooling system through engine filler cap, allowing air to bleed through bleed tap until coolant reservoir is full.

Right Thermostat
1. With engine cold, remove cooling pressure caps from engine and coolant reservoir tank.
2. Loosen system bleed tap from lefthand side of radiator top rail.
3. Disconnect lower radiator hose and partially drain coolant.
4. Remove righthand air cleaner cover and element.
5. Disconnect two wires from switch in air cleaner backplate.
6. Reposition supplementary air valve from backplate. Remove four bolts securing air cleaner backplate to throttle housing and remove backplate.
7. Disconnect top radiator hose from thermostat housing.
8. Remove four thermostat housing bolts.
9. Remove thermostat and gasket.
10. Reverse procedure to install, noting the following:
a. Torque thermostat housing bolts to 17-20 ft.lbs.
b. Slowly fill cooling system through engine filler cap, allowing air to bleed through bleed tap until coolant reservoir is full.