Caution: When installing the thermostat, a new sealing ring must be installed.
Removal
1. Disconnect the negative battery terminal.
2. Drain the coolant from the cooling system. On 2.1 liter turbodiesel engines, the thermostat housing is located on the right rear side of the cylinder block and the front of the car must be raised to access the thermostat. On all other models, the thermostat housing (indicated by the arrow) mounted on the left front side of the cylinder head.
3. If necessary, remove the electrical wiring and hoses from the mounting brackets and move them away from the thermostat housing.
4. Disconnect the coolant hose from the thermostat housing.
5. Unscrew the mounting bolts and remove the thermostat housing cover.
6. Remove the thermostat from the 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 until it boils. When the water boils, the thermostat should open. Otherwise, replace it.
2. The thermostat opening temperature is marked on the thermostat.
3. A thermostat that does not close when the water cools also needs to be replaced.
Installation
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Installation is carried out in the reverse order of removal, taking into account the following points:
- always install a new seal (photo on the left - installing a new sealing ring on the thermostat, photo on the right - installing the thermostat in the casing);
- on models where the coolant hose is attached to the thermostat housing with a snap-fit connection, the O-ring in the connector must be replaced;
- refill the cooling system.