11 53 000 Removing and installing/replacing coolant thermostat (M52TU / M54 / M56)
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2006 BMW 325Ci, 2005 BMW 325xi, 2005 BMW 325i, 2005 BMW 325Ci, and 2004 BMW 325xi. However, it is still accessible from the selected car via links, so may be relevant.
Remove fan clutch with fan impeller and fan cowl. See 11 52 020 Removing and installing/replacing fan clutch (S52 / S54 / M52 / M52TU / M54 / M56)
Drain and dispose of coolant.
NOTE:
The water drain plug is located on the exhaust side on cylinder 2 in the engine block.
Installation:
Replacing sealing ring on water drain plug.
Tightening torque, refer to 11 11 5AZ in ENGINE - TIGHTENING TORQUES .
Vent cooling system and check for leaks.
Pull locks and disconnect water hoses.
Installation:
Refer to general instructions for work on cooling system.
Loosen nut (1).
Release screws on thermostat housing, remove thermostat housing.
Installation:
Keep sealing faces clean and free of oil.
NOTE:
Coolant thermostat is integrated in coolant thermostat housing and can only be replaced as a single unit.
Installation:
Replace seal (1).