Heating/A/C - Pulse Or Drone Noise From Front Of Vehicle
SI B64 04 10
Heating and Air Conditioning
April 2011
Technical Service
This Service Information bulletin supersedes SI B64 04 10 dated July 2010.
[NEW] designates changes to this revision
SUBJECT
Pulsing Noises from the Auxiliary Water Pump
MODEL
F01, F02 (7 Series)
F07 (Gran Turismo)
[NEW] F04 (ActiveHybrid 7)
[NEW] F10 (5 Series)
[NEW] Vehicles produced up to 10/28/2010
SITUATION
A pulsing or droning noise is heard from the front of the vehicle.
[NEW] CAUSE
The auxiliary water pump or the water hoses that lead from it may be in contact with the adjacent components, or the auxiliary pump may be
installed incorrectly on the rubber mount. Harmonic vibration from the auxiliary water pump is being transferred through the bracket that holds the
pump.
[NEW] PROCEDURE
Remove the auxiliary water pump (follow Repair Instruction REP 64 11 262 Removing and installing/replacing auxiliary water pump), and remove
the original water pump bracket. Install the new water pump equipped with the modified bracket. When reinstalling the pump, ensure that the
connecting hoses do not come into contact with adjacent components.
[NEW] PARTS INFORMATION
2010 BMW 750i xDrive AWD (F01) V8-4.4L Turbo (N63) Page 202
