Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.
Replace the water temperature regulator (thermostat) on a regular basis in order to reduce the chance of unscheduled downtime and of problems with the cooling system.
The thermostat should be replaced after the cooling system has been cleaned. Replace the thermostat and replace the seals while the cooling system is completely drained or while the cooling system coolant is drained to a level that is below the thermostat housing.
Note: If you are only replacing the thermostat, drain the cooling system coolant to a level that is below the thermostat housing.
Failure to replace the engine's thermostat on a regularly scheduled basis could cause severe engine damage.
- Loosen hose clamp (1) and remove the hose from the elbow. Disconnect the hose assembly from the thermostat housing assembly.
- Remove bolts (2) from the elbow. Remove the elbow and the thermostat housing assembly (3) .
- Remove the gasket, the thermostat, and the seal from the thermostat housing.
- Install a new seal in the thermostat housing. Install a new thermostat and a new gasket. Install the thermostat housing on the engine cylinder head.
AVSpare engines incorporate a shunt design cooling system and require operating the engine with a thermostat installed.
If the thermostat is installed wrong, it will cause the engine to overheat. Inspect gaskets before assembly and replace if worn or damaged.
- Install the elbow and the hose. Tighten the hose clamp.