Buy Thermostat housing and repair your car affordably

How the thermostat functions and its task

The task of the thermostat during the cooling of water in an internal combustion engine is the control of the cooling circuit and thus the engine temperature. Reach the optimum operating temperature quickly is important both for a long lifetime of the motor as well as for a low exhaust gas development and a low fuel consumption. As long as this is not achieved after starting the thermostatic valve remains closed and the cooling water circulates only through the engine, as well as the water pump and the heater core. Upon reaching the operating temperature the thermostat valve opens and the cooling sets in through the cooler of the car. If the temperature exceeds a further threshold value a fan is also switched on through a switch on the thermostat for cooling of the cooling water. The temperature-dependent control of the valve is usually carried out by a special wax filling in the thermostat. Upon reaching the desired temperature the wax liquefies and expands, whereby it pushes against a piston which opens the valve. Moreover in newer vehicle models there are also electrically controlled thermostats, through which the engine cooling can be controlled more completely and accurately. Known manufacturers of thermostats are, for example, Behr Hella, Mahle, Valeo, Wahler, as well as Herth+Buss.

When the thermostat of the car is defective

Basically, the thermostat is maintenance-free and designed for the life of the vehicle. However, some impurities in the cooling water circuit may cause damage to the thermostat. If a thermostat is defective, the temperature of the engine and cooling cycle is not optimally controlled. So it takes longer until the engine reaches its operating temperature, which raises the fuel consumption and exhaust emissions after starting the car. On the other hand, a defective thermostat causes the motor to overheat, which may cause the cylinder head or the engine mechanics to be damaged. A defective thermostat should therefore be replaced immediately.

Exchanging the thermostat

The thermostat is located in the engine compartment, usually in a housing near the engine. In order to dismantle and replace it peripheral components such as the fan often have to be removed. The motor should definitely be cold, otherwise an increased risk of injury from leakage of hot cooling water is possible. You can order a new thermostat inexpensively and conveniently in our online shop. Here you will also receive a variety of other high-quality replacement parts from reputable manufacturers at low prices.