11 53 000 Removing and installing/replacing coolant thermostat (M52TU / M54 / M56)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW X5, 2006 BMW X3, 2005 BMW X5, 2005 BMW X3, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Remove fan clutch with fan impeller and fan cowl.
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 11 11 5AZ. Refer to ENGINE - TIGHTENING TORQUES .
Vent cooling system and check for leaks.
Pull locks and disconnect water hoses.
Installation:
Refer to 17 00... INSTRUCTIONS FOR WORKING 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).