11 51 000 Removing and installing/replacing water pump (N62/N62TU)

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Only carry out work on the cooling system after the engine has cooled down (Risk Of Scalding) . Refer to 17 00 ... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

Necessary Preliminary Tasks:

Drain and dispose of coolant from radiator.
Remove fan cowl.
Remove electric fan. Refer to 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (N62, N62TU) .
Remove alternator drive belt. Refer to 11 28 010 REPLACING ALTERNATOR DRIVE BELT (N62/N62TU) .

Unlock and detach plug connections (1).

Release screw and remove vacuum line holder.

Unlock and detach all coolant hoses on water pump.

Release screws and remove belt pulley (2).

Fig 1: Locating Belt Pulley Retaining Screws

G03270147

Courtesy of BMW OF NORTH AMERICA, INC.

Remove vibration damper. Refer to 11 23 010 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER (N62/N62TU) .

Release screws and remove water pump (1).

Fig 2: Identifying Water Pump Retaining Screws

G03270148

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check adapter sleeve (1) for correct seating and damage; replace if necessary.

Clean sealing faces (2).

Fig 3: View Of Adapter Sleeve

G03270149

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean sealing surfaces.

Replace sealing rings (1 and 2).

Fig 4: Locating Sealing Rings

G03270150

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace both coolant pipes (1) and coat sealing surfaces with anti-friction rubber coating.

Thin coolant pipe (1) only with water-cooled alternator.

Fig 5: Identifying Coolant Pipes

G03270151

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Remove coolant thermostat and coolant sensor of faulty water pump. Check coolant thermostat and coolant sensor for damage and replace if necessary. Install coolant thermostat and coolant sensor in new water pump.

Assemble engine.

Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .