Thermostat: Service and Repair

Thermostat, 4-cyl.

Warning: Take care if the car is warm. The coolant is hot and there is also a risk of burning yourself on the manifold.

To remove





1. Open the cap on the expansion tank and release the pressure.
2. Raise the car.
3. Remove the lower front cover.
4. Drain off the coolant.
5. Lower the car to the floor.





6. Loosen the hose clamp on the upper radiator hose mounting at the thermostat housing.
7. Move the hose to one side.





8. Undo the ground connection and bracket for the coolant pipe by the thermostat housing.
9. Slacken the upper bolt for the thermostat housing and remove the lower bolt.





10. Remove the thermostat housing and thermostat.

To fit






1. Check and clean the sealing surfaces. Grease the rubber seal lightly with non acidic Vaseline.
2. When fitting the thermostat, ensure that the vent hole is at the top (thermostat marking "TOP").





3. Fit the thermostat housing.
Tightening torque: 22 Nm (16.2 ft. lbs.).
4. Fit the ground cable and the coolant pipe bracket. Apply acid-free Vaseline to both sides of the ground connection.





5. Position the upper radiator hose and fit the hose clip on it. Connect the radiator hose.
6. Fill with coolant. Do not forget to close the drain plug on the radiator first. Refer to Coolant for mixtures. Close the cap.
7. Check for coolant leakage. Start the engine, set the heat to Maximum and run the engine until warm.
8. Switch off the engine.
9. Check the coolant level.
10. Raise the car.
11. Fit the lower front cover.