Warning! Driving without a thermostat is highly discouraged, as the processor unit will begin to operate in open-loop mode, resulting in increased fuel consumption and exhaust toxicity.
1. Before replacing the thermostat, check the coolant level, drive belt tension, and the serviceability of the temperature gauge and sensor.
2. If the engine takes a long time to warm up, the thermostat should be replaced.
3. If the engine frequently overheats, check the temperature of the upper radiator hose. If the hose is cold, the thermostat is closed and should be replaced.
4. If the upper radiator hose is hot when the engine overheats, the thermostat is open and liquid gets into the radiator. The cause of overheating in this case is a malfunction of the engine systems.
5. If the engine has overheated, then, as a rule, the cylinder head gasket is damaged, the pistons are scored, and the cylinder head is warped or cracked.
6. Drain about 3 liters of coolant.
7. Disconnect the upper radiator hose from the thermostat cover, which is located at the front of the intake manifold.
8. Loosen the nuts/bolts and remove the cover (see photo).
9. Mark the position of the installed thermostat and remove the thermostat (see photo).
10. Clean the thermostat seating surface.
-11. Apply a thin layer of RTV sealant to the split surfaces of the thermostat housing and cover, install the new thermostat. Make sure that the spring faces the housing side (or intake manifold).
12. Install a new gasket on the housing, without displacing the gaskets, install the cover and tighten the bolts. Tighten the bolts to the specified torque. Exceeding the tightening torque leads to deformation of the cover.
13. Install the removed parts. Fill the cooling system with liquid.