Elements of the engine cooling system
1 – branch pipe for coolant supply; 2 - thermostat; 3 - water pump; 4 - IAC valve; 5 – an exit of a cooling liquid from the engine; 6 - oil cooler
Location of the coolant supply pipe to the engine on the 1MZ-FE V6 engine
Attention! Care must be taken when opening the expansion tank cap on a hot engine, as escaping hot vapors can cause severe burns.
Attention! Do not allow coolant to come into contact with clothing or body paintwork. Otherwise, rinse the surface with plenty of water.
Attention! After turning off a hot engine, the radiator fan may turn on.
The sealed type cooling system includes a pump, a radiator, an expansion tank, an electric radiator fan and a thermostat. When starting a cold engine, coolant circulates around the cylinder block, cylinder head, and exhaust manifold. The warm coolant passes through the heater core and returns to the water pump. Since the coolant expands when heated, its level in the expansion tank rises. The flow of coolant through the radiator is closed, which provides a closed thermostat. When the coolant reaches a predetermined temperature, the thermostat opens and hot coolant flows through the hose to the radiator. Since the coolant passes through the radiator, it is cooled by the flow of oncoming air. An electric radiator cooling fan mounted behind the radiator is controlled by a thermal sensor located in the radiator. In addition to the conventional coolant temperature gauge sensor, temperature switches and sensors are installed to ensure the operation of the fuel injection system and the ignition system.