Thermostat: Service and Repair

Coolant thermostat, checking, removing and installing

Note:
Always replace seals and gaskets.

Removing

- Drain cooling system.

Vehicles with air conditioning

CAUTION
The air conditioning refrigerant circuit must not be opened.

- Unbolt front engine cover support from intake manifold.
- Remove retainers for refrigerant hoses.





- Unbolt A/C compressor, lift clear together with refrigerant hoses (do not disconnect) and tie in place on hood lock.

All vehicles





- Disconnect coolant hose from connection -3-.
- Remove bolts -4- and remove connection, O-ring -2- and coolant thermostat -1-.

Installing

- Clean and smooth down sealing surface for O-ring as required.
- Insert coolant thermostat.

Installation position: bowed metal strip on thermostat must be vertical.

- Moisten new O-ring with coolant G 012 A8 D.
- Tighten bolts.
- Fill with coolant.

Tightening torque

Connection to cylinder block: 15 Nm

Checking coolant thermostat

- Heat thermostat in water bath.