11 51 000 Removing And Installing/Replacing Water Pump (N73)

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WARNING: Danger of scalding! Only perform these tasks on an engine that has cooled down.

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

Necessary Preliminary Tasks:

Remove fan cowl. Refer to 17 11 031 REPLACING FAN COWL (N73) .
Remove alternator drive belt. Refer to 11 28 010 REPLACING ALTERNATOR DRIVE BELT (N73) .
Remove A/C compressor drive belt. Refer to 11 28 050 REPLACING A/C COMPRESSOR DRIVE BELT (N73) .
Remove vibration damper. Refer to 11 23 010 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER (N73) .

Disconnect plug connections (1).

Release screws and remove belt pulley (2).

Unlock and detach both coolant hoses on water pump.

Fig 1: Locating Belt Pulley Retaining Screws

G03292115

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws and remove water pump (1).

Fig 2: Identifying Water Pump Retaining Screws

G03292116

Courtesy of BMW OF NORTH AMERICA, INC.

Clean sealing faces (1 and 2).

Installation:

Replace all gaskets and sealing rings, replace water pump if necessary.

Fig 3: View Of Sealing Faces

G03292117

Courtesy of BMW OF NORTH AMERICA, INC.

Replace connecting pipe (1) to alternator.

Installation:

Coat sealing surfaces of connecting pipe (1) with anti-friction rubber coating.

Fig 4: Replacing Alternator Connecting Pipe

G03292118

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

When replacing water pump:

Convert coolant thermostat.

Convert water temperature sensor.

Assemble engine.

Check cooling system for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N73) .