Noise from Aux water pump
03-11-2008, 05:30 AM
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My auxiliary water pump is making a pretty loud whining noise at idle when the heater is tunrned on. Took it to the dealer and they said it's normal operation. Did anyone else have a similar issue? I did a search and could not find much information related to this.
03-11-2008, 09:29 AM
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I had simililar problem sometime back. The local dealer replaced the aux water pump, but that did not solve it, than they identified the cause to faulty mounting for the aux pump (apparently it is a problem BMW are aware of an have since rectified the faulty mounting for newer models). It was all done under warranty. If I were you, I would get a 2nd opinion from another dealer(s).
03-11-2008, 11:18 AM
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My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.
Is the Auxiliary water pump the same as the water pump or are there two?
03-11-2008, 11:20 AM
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Originally Posted by BizyB' post='542966' date='Mar 11 2008, 11:29 AM
I had simililar problem sometime back. The local dealer replaced the aux water pump, but that did not solve it, than they identified the cause to faulty mounting for the aux pump (apparently it is a problem BMW are aware of an have since rectified the faulty mounting for newer models). It was all done under warranty. If I were you, I would get a 2nd opinion from another dealer(s).
03-11-2008, 11:27 AM
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Originally Posted by pennetta' post='543044' date='Mar 11 2008, 01:18 PM
Is the Auxiliary water pump the same as the water pump or are there two?
03-11-2008, 05:04 PM
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Originally Posted by vadim' post='543057' date='Mar 11 2008, 02:27 PM
There are two, the main one is mechanical, and the auxiliary is electric.
03-11-2008, 07:01 PM
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Originally Posted by sigma' post='543233' date='Mar 11 2008, 08:04 PM
Do you know where the aux pump is located? RealOEM isn't helping me but I am 90% sure I am having the same problem and I'd like to get up close to it to verify.
03-11-2008, 11:52 PM
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Originally Posted by vadim' post='543051' date='Mar 11 2008, 03:20 PM
Thanks! So, then they did replace the mounting afterwards and the problem went away?
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