Thermostat location: 1 - connecting hose; 2 - hose to the water pump inlet pipe; 3 - expansion tank hose; 4 - thermostat; 5 - radiator drain hose
You will need: a screwdriver.
If the engine takes a long time to warm up after starting or overheats during operation, a possible cause may be a faulty thermostat.
The main thermostat valve should begin to open at a coolant temperature of 85–95°C and should be fully open at 102°C. The valve stroke should be at least 8 mm.
The thermostat is interchangeable with the thermostat of the VAZ-2108 car.
To check the thermostat, place it in water heated to 78–80°C. Heat the water, stirring constantly, to (87±2)°C. At this temperature, the main thermostat valve should begin to open. Otherwise, replace the thermostat.
1. Disconnect the three hoses from the thermostat by loosening the clamps that secure them.
2. Loosen the clamp on the connecting hose.
3. Remove the thermostat by pulling its pipe out of the connecting hose. Install the new thermostat in the reverse order of removal and fill the cooling system with fluid.