64 11 262 Removing and installing/replacing auxiliary water pump

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!
Only perform this work after engine has cooled down.

Necessary preliminary tasks:

If necessary, remove intake filter housing. See 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING .
Disconnect coolant hoses from auxiliary water pump.

Fig 1: Water Hose, Nut, Special Tool (13 3 010) And Removal Direction

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: When removing water hoses which are located in the upper area of the cooling system, disconnecting them using Special Tool 13 3 010 prevents a large-scale escape of coolant.

Unlock fast-release couplings (1) and detach coolant hoses from auxiliary water pump (4).

Installation:

Follow instructions for working on cooling system. See 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

Fill and vent cooling system. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .

If necessary, release expander rivet (2).

Unfasten plug connection (3) and disconnect.

Fig 2: Identifying Fast-Release Couplings And Auxiliary Water Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Ensure correct routing of cables.

Remove auxiliary water pump (4) in direction of arrow.

Replacement:

Detach auxiliary water pump fixture (1) in direction of arrow from auxiliary water pump (2).

Installation:

Make sure auxiliary water pump (2) is correctly seated in auxiliary water pump fixture (1).

Fig 3: Identifying Auxiliary Water Pump And Auxiliary Water Pump Fixture

Courtesy of BMW OF NORTH AMERICA, INC.