Thermostat: Service and Repair

Coolant thermostat, removing, installing and checking

Removing

Note:
^ Always replace seals and gaskets.
^ Obtain radio anti-theft code on vehicles with coded radio.
^ Secure all hose connections with hose clamps of the same type as those installed at the factory.

- With the ignition switched off, disconnect the battery Ground (GND) strap.
- Drain cooling system
- Detach coolant hose at bracket for solenoid valves above alternator.





- Unbolt bracket for solenoid valves -2- and -3- in front of intake manifold and detach dipstick guide tube -4-.





- Pull connector -3- and vacuum hose -1- out of bracket.
- Lay bracket clear to the side without detaching remaining connections.





- Disconnect coolant hose from elbow connection -3-.
- Remove bolts -4- and take off elbow connection, O-ring and 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 up with coolant.

Tightening torque





- After connecting battery terminals, enter anti-theft code for radio

Go to Radio operating instructions

WARNING!
If a battery charger is used to give the engine an assisted start, there is a risk that the control modules in the vehicle will be damaged.

- Close electric windows in front doors all the way to their top positions using electric switches.
- Then operate all electric window switches again for at least one second in the "close" direction to activate the automatic one-touch function.
- Set clock to correct time.
- Interrogate DTC memory

Note:
DTCs will have been stored in the memory because connectors have been disconnected. Therefore interrogate and erase DTC memory after installing engine.

Testing coolant thermostat

- Heat thermostat in water bath.