Engine Oil Cooler Thermostat: Service and Repair

Removing And Installing/Replacing Thermostat Cartridge For Transmission Oil Cooling E53/M54

Warning! Danger of scalding - this task may only be carried out once engine has cooled down.

Remove coolant expansion tank.

Note: For purposes of clarity, this work step is shown on a removed expansion tank/mounting plate.





Pull expansion tank (1) up and out of mounting plate (3).

Withdraw thermostat cartridge (2) from connection.

Installation:
Check O-rings, replace if necessary.
Pay attention to turning lock when installing thermostat cartridge (2).