Thermostat: Service and Repair

Removal Procedure





1. Drain the engine cooling system to a level below that of the thermostat housing. Refer to Draining and Filling Cooling System in Cooling System.
2. For a 1.3L engine, release the hose clamp in order to remove the upper radiator hose at the thermostat housing cap (3).





3. For a 1.0L engine, release the hose clamp in order to remove the upper radiator hose at the thermostat housing cap (4).
4. Remove the two retaining bolts in order to remove the water outlet from the housing.
5. Remove the thermostat and the gasket from the thermostat housing.





6. Inspect the thermostat air bleed valve (2) in order to ensure that the valve (2) is clear. The engine could overheat if this valve becomes clogged.
7. Inspect the valve seat for foreign objects that is preventing the valve from seating.
8. Test the thermostat for proper operation. Refer to Thermostat Diagnosis in Cooling System.

Installation Procedure
1. Install the thermostat and the new gasket to the housing.
2. Install the water outlet to the housing.





3. For a 1.3L engine, secure the hose with a hose clamp (3).

Notice: Refer to Fastener Notice in Service Precautions.





4. Secure the water outlet to the housing (3) with two retaining bolts.
Tighten the water outlet retaining bolts to 20 Nm (15 ft. lbs.).
5. Install the upper radiator hose to the thermostat cap.
6. Secure the hose with a hose clamp (4), for a 1.0L engine.
7. Refill the engine cooling system. Refer to Draining and Filling Cooling System in Cooling System.