Removal
Removal the coolant hose from the thermostat housing on 4-cylinder gasoline models
Removal the thermostat cover
Removal the gasket from the thermostat housing
Removal the thermostat from the thermostat housing
1. The thermostat is mounted in a housing that is bolted to the side of the water pump.
2. Remove the ground cable 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, tap it, but do not insert a screwdriver between the cover and the thermostat housing (see Fig. Removing the thermostat cover).
5. Remove the gasket and, after marking the location, remove the thermostat from the housing (see fig. Removing the gasket from the thermostat housing, Removing the thermostat from the thermostat housing).
Examination
1. A rough check of the thermostat can be done by hanging it on a thread in a glass vessel filled with water and heating the water to boiling. When the water boils, the thermostat should open, otherwise replace it.
Installation
1. Clean the mating surfaces of the thermostat cover and housing.
2. Install the thermostat in the housing so that the side with the spring faces the housing. On diesel models, the tab on the housing cover should fit into the groove on the thermostat. On gasoline models, install the thermostat so that the air bleed valve is at its highest point.
3. Install the gasket onto the thermostat housing.
4. Install the thermostat cover and tighten the mounting bolts to the specified torque.
5. Connect the coolant hose to the thermostat cover.
6. Fill the cooling system with coolant.