11 51 000 Removing and installing complete water pump (M52 / S52 / 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 alternator drive belt. See 12 31... REPLACING ALTERNATOR BELT PULLEY
NOTE:
M52/S52
Water drain plug is located on exhaust side between cylinders 4 and 5 in engine block (illustration).
M52TU / M54 / M56
Water drain plug is located on exhaust side on cylinder 2 in engine block.
Drain and dispose of coolant.
Installation:
Replace seal.
Tightening torque. Refer to ENGINE - TIGHTENING TORQUES - 3-SERIES (E46) .
Vent cooling system and check for leaks.
Release belt pulley.
Release water pump.
Tighten two screws (M 6) into thread of water pump and water pump out of timing case.
Installation:
Replace O-ring and coat with coolant as anti-friction agent.