low pitch whine from auxiliary water pump 02 4.6is
 

This noise is driving me nuts. It goes away when you turn the fan/heater off, and is right back again when you turn the fan on. The first dealer I took it to told me it was the pump and said they had replaced it - noise still there. The second dealer I took it to told me it's the pump and that all X5s have this noise and there is nothing that can be done. I call BS. Anyone else notice a low pitched whine that goes some high to low and is constant in their X5?

thx

Is it throttle related?

It happens to me also. I was told by the dealer they all do it and even his own M5 does it. I turned my heat on for the first time of the year the other day, heard that noise and turned the heat right back off. I put the heated seat on instead...............

I have the exact same noise but it has nothing to do with the heater.The whine noise goes away as soon as you turn the fan motor off.I have asked this forum about this noise before but not many people responded.My dealer also said its normal but that does not seem right.Please keep me updated on what you do or find out.

Yeah - me. :)

Sorry David - couldn't resist.

I knew that was coming :D Just don't want to be snowed by yet another dealer :) You're in for it now, however!

A little late to the party, but I have this noise also. I am not sure what it is but it is truely annoying. Would love to know if anyone found a fix from their dealer. My dealer said it is normal. i sat in 3 other 4.8is vehicles today and NONE exhibited the noise that I have in my 4.8is.

Curtis

I just had the fan blower motor replaced because of a similar noise in my '06 4.8 (only 2 months old). I made the shop (Crevier BMW) foreman ride along to hear the noise. I thought it sounded like a bad bearing. They took the dash apart and found that the motor did have a bad bearing which would seem to explain the whining noise when the fan was on, and lack of noise when off. So far no more noise.

Is it possible that all of our cars with this noise have bad bearings.This does not seem right.

http://www.xoutpost.com/x5-e53-forum/...light=whinning

What mine turned out to be in 4.4.

Take your X in for an inspection and have a tech ride in it to verify the noise. When my wife first took our X in, the tech said he could not hear it, but he admitted he did not actually road test at highway speed. On the second visit, I made the tech ride along. The noise only came on when the vehicle got over 35mph, then it stayed on until you turned off the blower or engine completely. It could be that these blower motors are just prone to failure since our 4.8 is still pretty new (7/06 prod.), and this problem noise seems too common in this model.

Same noise in my 2001 X5 was the auxilary pump:

http://www.xoutpost.com/x5-e53-forum/...ump-noise.html

Replaced pump and noise is almost unoticable

Well now there are 2 solutions to this whining noise.Which one is the real culprit.Walking into the dealer and telling them to do both of these remedies and they will look at me like I am crazy.I think the problem needs to be narrowed down or figure out which one is right.

I replaced the secondary water pump today and that did nothing to get rid of the whining noise.The member who said this was the solution did not give good advice.What a waste a time.I need the real answer

Anyone try their final stage resistor? I have no idea if it will work. Have seen it mentioned for noises with the ac/heater.

YMMV

Curtis

Ok, the noise has nothing to do with engine RPM's. I've confirmed that so has several other people. Plus it only is whining when the fan is ON not OFF. You water pump is operating all the time (logical guess) so thus this would lead me to believe that its a fan blower motor. JEK889 has the answer it looks like. Same problems, no more noise after this repair.

I will however deal with it for now since I'm out of warranty. Pulling the dash apart doesn't sound fun right now:confused:

On key note as well. I seem to have zero air blowing on the drivers side foot well when its correctly selected. This would make be think I have issues with my blower. Does anyone else have this problem of any air being blown down to your drivers side? Or any other side as well???

Its called FREE advice woodranch.......no one is wasting anyones time here. Just trying to help everyone out. Relax.........:rolleyes:

OK, I got a question for you guys on this whole fan noise/buzz/oscillation

Does it only happen when the system is set to warm (red dots and 78+ on the temp setting)? Is the noise still there when you go to say 60 and all blue dots? How about low setting (fan speed) vs. 3 or 4 bars of fan speed?

I am just trying to narrow it down if it is hot or cold and high or low fan speed.... or combo.

Thanks again.

Curtis

Mine whines no matter how many bars (fan speed) I have on. As for the temp deal, dunno. I'll have to check that one. However I don't recall noticing it when my air was running this summer.

I have the same problem but only seems to happen until the engine warms up and then it goes away. Mine is not that noticeable.

Thanks for replying to that wheelman. I mean, that's what worked for me having similar symptoms, that doesn't mean it going to work for every X5 out there.

Back to topic: I still bearly hear the whinning after changing out the aux. pump, but it's alot less noticeable then it was, so I would say that the aux. water pump wasn't the ONLY source of the problem, BUT my pump was amplifying the noise quite a bit.

The noise WAS coming from the aux. water pump though. To check, turn engine off, and climate fan on to low speed (one notch is enough to turn the pump on). Then open hood. The whinning noise is from behind the driver side head light (aux. water pump location). If you can't hear, then try different heat settings (mine whines at medium heat, about 22 degrees C).

Now there must be something else oscillating the pump (noise going up and down). I beleive it's the heater valve opening and closing (if you touch the heater valve you can feel it click open and closed). My question is, is it normal for the heater valve to do this?

Someone hear said the the dealer told them it was the aux pump AND the heater valve to be replaced?

Again, just my situation...

Sorry guys that I jumped on you.........but this whining noise is driving me nuts.The whining noise will completely stop if you A)turn off the fan or B) turn the climate control down to 60 degrees.If the climate control is at 60 degrees and the fan is on you will not hear the pulsating whining but as soon as you move up the tempature up the whining sound starts.My whining sound is constant and quite bothersome.Again sorry about the previous response but I was just bummed that was not the solution.How can the dealers not have an answer to this problem when so many of us have it?

I really only hear my noise while stopped with the heat on at any temp and any fan speed. I would imagine that it is a bearing or something that has to do with the fan motor controlling the hot air output. It is amazing that the dealers just accept this as normal even in their own cars.

One option.
http://www.xoutpost.com/x5-e53-forum/...t=engine+whine

http://www.xoutpost.com/x5-e53-forum/...t=engine+whine
Another idea.

Not the same noise...........this whining noise is constant;not just when you accelerate.Our noise comes from the fan motor

Problem I had personally.
http://www.xoutpost.com/x5-e53-forum/...t=engine+whine

These are 2 different issues