An engine cooling system device designed to switch fluid circulation circuits - a thermostat. This element of the cooling system operates cyclically in closed and open mode.

1. X3 (E83)
2. X3 SAV (E83)
3. 7 (E65, E66, E67)
4. 7 Saloon (E65, E66, E67)
5. 3 Compact (E46)
6. 3 (E46)
7. 3 Saloon (E46)
8. 3 Touring (E46)
9. 3 Coupe (E46)
10. 5 (E60)
11. 5 Saloon (E60)
12. X5 (E53)
13. X5 SAV (E53)
14. 5 Touring (E61)
15. 3 Convertible (E46)
16. 3 (E90)
17. 3 Saloon (E90)
18. 3 Touring (E91)
19. 3 Coupe (E92)
20. 3 Convertible (E93)
21. See more in applications

At a low temperature of the coolant, the thermostat is closed, which contributes to its movement in a small circle and rapid heating to operating temperature. Upon reaching the nominal value, the thermostat opens and directs the coolant in a large circle through the radiator, where it is cooled. Thus, the constant opening and closing of the thermostat valve helps to maintain a constant temperature of the antifreeze in the system.

The construction of an GATES brand Thermostat, oil cooling

The main elements of the thermostat:

1. frame;
2. stock;
3. thermoelement (usually artificial wax);
4. valve with piston and spring;
5. seals;
6. guiding device.

The thermostat can be framed or non-framed (mounted in the engine block). It has marking and embossed technical parameters (full opening temperature).