Removing
Removing the coolant hose from the thermostat housing on models with 4-cylinder gasoline engines
Removing the thermostat cover
Removing the gasket from the thermostat housing
Removing the thermostat from the thermostat housing
1. The thermostat is housed in a housing that is bolted to the side of the water pump.
2. Remove the ground wire from the battery and drain the coolant from the cooling system.
3. Loosen the clamp and remove the coolant hose from the thermostat housing (see fig. Removing the coolant hose from the thermostat housing on models with 4-cylinder gasoline engines).
4. Unscrew the bolts and remove the thermostat cover. If the cover does not come off, knock on it, but never insert a screwdriver between the cover and the thermostat housing (see fig. Removing the thermostat cover).
5. Remove the gasket and, noting the location, remove the thermostat from the casing (see fig. Removing the gasket from the thermostat housing, Removing the thermostat from the thermostat housing).
Examination
1. A rough test of the thermostat can be done by hanging it from a thread in a glass vessel filled with water and heating the water to a boil. When the water boils, the thermostat should open, otherwise replace it.
Installation
1. Clean the mating surfaces of the cover and thermostat housing.
2. Install the thermostat into the housing with the spring side facing towards the housing. On diesel models, the tab on the housing cover must fit into the groove on the thermostat. On petrol models, set the thermostat so that the bleed valve is at its highest point.
3. Install the gasket on the thermostat housing.
4. Install the thermostat cover and tighten the mounting bolts, tightening them to the required torque.
5. Connect the coolant hose to the thermostat cover.
6. Fill the cooling system with coolant.