E70 4.8 pump noise when stationary

Dulechino · 07-23-2012, 10:49 PM

My 08 4.8 X5 is making a strange pump like whirring sound after driving and then coming to a stop at traffic or lights etc. once you take off it stops. It sounds like a pump or similar sound. Not linked to engine rpm. I noticed if you turn off the AC while it's making the noise it will stop. So may be related to that, but what could it be that it's switching on at low rpm or stopped speeds? Any ideas?
Is there some engine vacuum pump or similar?

I have the service manual DVD but its so hard to learn about the car, more a reference of u already know what's there.
Thanks

StephansonTieu · 07-24-2012, 12:03 AM

That might be your AC compressor. Should get that checked out before damaging it, kinda pricey.

Good luck!

Dulechino · 07-26-2012, 06:27 PM

im taking it in this morning to get looked at, strange that it only happens when you come to a stop though...

Dulechino · 09-09-2012, 12:27 AM

Didn't end up dropping it of to the dealer as the noise wasn't present that day, but after trying to find the source myself first, i discovered an oil leak from the vacuum pump, mounted to the front of the engine, right hand side bank.
this fits with my vacuum pump noise suspicion.
now i will get the dealer to investigate. since i have a smoking gun to point them too.
Ill let you know how it goes.

Dulechino · 12-28-2012, 05:16 PM

As an update, the vacuum pump replacement cured the noise.

westgo33 · 10-18-2013, 02:48 PM

I have a similar pump like pulsating noise, that seems to be associated with the HVAC...which parts (pump) were involved in the fix? Thanks!

07-23-2012, 10:49 PM	#1
Dulechino New Member 7 Rep 18 Posts Drives: Bmw x5 Join Date: Jun 2012 Location: Perth Australia iTrader: (0)	E70 4.8 pump noise when stationary My 08 4.8 X5 is making a strange pump like whirring sound after driving and then coming to a stop at traffic or lights etc. once you take off it stops. It sounds like a pump or similar sound. Not linked to engine rpm. I noticed if you turn off the AC while it's making the noise it will stop. So may be related to that, but what could it be that it's switching on at low rpm or stopped speeds? Any ideas? Is there some engine vacuum pump or similar? I have the service manual DVD but its so hard to learn about the car, more a reference of u already know what's there. Thanks
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07-24-2012, 12:03 AM	#2
StephansonTieu X5 Enthusiast 3 Rep 119 Posts Drives: 2001 BMW x5 3.0i Join Date: May 2012 Location: Toronto, Ontario iTrader: (0) Garage List 2001 BMW X5 [9.00]	That might be your AC compressor. Should get that checked out before damaging it, kinda pricey. Good luck!
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07-26-2012, 06:27 PM	#3
Dulechino New Member 7 Rep 18 Posts Drives: Bmw x5 Join Date: Jun 2012 Location: Perth Australia iTrader: (0)	im taking it in this morning to get looked at, strange that it only happens when you come to a stop though...
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09-09-2012, 12:27 AM	#4
Dulechino New Member 7 Rep 18 Posts Drives: Bmw x5 Join Date: Jun 2012 Location: Perth Australia iTrader: (0)	Didn't end up dropping it of to the dealer as the noise wasn't present that day, but after trying to find the source myself first, i discovered an oil leak from the vacuum pump, mounted to the front of the engine, right hand side bank. this fits with my vacuum pump noise suspicion. now i will get the dealer to investigate. since i have a smoking gun to point them too. Ill let you know how it goes.
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12-28-2012, 05:16 PM	#5
Dulechino New Member 7 Rep 18 Posts Drives: Bmw x5 Join Date: Jun 2012 Location: Perth Australia iTrader: (0)	As an update, the vacuum pump replacement cured the noise.
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10-18-2013, 02:48 PM	#6
westgo33 Registered 0 Rep 3 Posts Drives: 08 X5 E70 Join Date: Oct 2013 Location: B.C. Canada iTrader: (0)	I have a similar pump like pulsating noise, that seems to be associated with the HVAC...which parts (pump) were involved in the fix? Thanks!
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