Removing and checking the thermostat

The malfunction of the thermostat can be checked without dismantling it. With a working thermostat, after starting a cold engine, the outlet (lower) The radiator hose should remain cold for a while and then heat up rapidly, indicating that the coolant has begun to circulate in a large circle.

To dismantle the thermostat, drain the coolant (see Coolant replacement).

Attention! The ingress of coolant into the generator disables it.

To prevent the remnants of the coolant from getting on the generator, we cover it with plastic wrap.

We loosen the clamps of the fluid supply hose to the pump,..



... thermostat bypass hose,..

...and the radiator outlet hose.

Disconnecting the hoses...



... remove the thermostat.

To check the thermostat, we lower it into a vessel with coolant, heat the vessel and control the beginning of the opening of the main valve with a thermometer.

Install the thermostat in reverse order.