11 53 000 Removing and installing/replacing coolant thermostat (M52TU / M54 / M56)
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 330Ci, 2005 BMW 330xi, 2005 BMW 330i, 2005 BMW 330Ci, and 2004 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Remove fan clutch with fan impeller and fan cowl. 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 ENGINE - TIGHTENING TORQUES - 3-SERIES (E46) .
Vent cooling system and check for leaks.
Pull locks and disconnect water hoses.
Installation:
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).