Thermostat

DESCRIPTION
















The engine cooling thermostats are a wax pellet driven, reverse poppet choke type. The thermostat is mounted in a housing on the coolant outlet of the engine.

OPERATION
The thermostat is designed to provide the fastest warm up possible by preventing leakage through them and to guarantee a minimum engine operating temperature of 88 to 93°C (192 to 199°F). They also automatically reach wide open so they do not restrict flow to the radiator as temperature of the coolant rises in hot weather to around 104°C (220°F). Above this temperature the coolant temperature is controlled by the fan, the radiator, and the ambient temperature, not the thermostat.
^ When engine is cold-thermostat is closed, cooling system has no flow through the radiator. The coolant bypass flows through the engine and heater only.
^ When engine is warm-thermostat is open, cooling system has flow through the bypass, heater and radiator