e70 x5 NOISEY PULLEY

[newby46]

Hey guys

Have trouble finding a noisy pulley on the Car.
If you are cruising and partially load the throttle there is no noise...
if you accelerate hard the noise sqeels for about 2 seconds then goes..i have tried in various gears and speeds same noise.
If the car is parked and you try rev there is no noise..

Any advice or any body had similar issues

Thanks inadvance

 

[samman325]

What makes you suspect it to be a pulley?

 

[newby46]

What makes you suspect it to be a pulley?

Have had a vbelt pulley type noise before on other vehicles. This sounds very similar.
Almost sounds like the belt slips or is dusty

 

[samman325]

what motor does the E70 have?

Whats the condition of the belt?

 

[newby46]

M57 motor

Belt looks like its still decent but I cant see the lower belt.
I have the small belt already but needs a special tool from what I can google to fit and remove

 

[Kolbe]

Had the same on my 3.0 diesel - replaced the serpentine belt - problem gone.

 

[newby46]

Bud is it the larger belt on the tensioner that you replaced or the smaller aircon one

 

[Kolbe]

Bud is it the larger belt on the tensioner that you replaced or the smaller aircon one

The larger one - drives power steering etc.

 

[newby46]

Thanks allot I ll have a look at changing it and see if it solves my problem

Thanks for the help

 

[akash]

Did you try a water test to see if it is the belt.

Carefully pouring some water on the belt will make the noise go away, you then know its a belt that the problem and not a pulley

 

[newby46]

Hey buddy have washed it to test belt but doesn help cause the noise is only on the road when driving

So after washing and then driving the noise is still there

 

[RAArmstrong]

Might be your vibration damper on the way out... Common on the BMW diesels

 

[supertramp]

Dean,

I did all the belts in December last Year they are like new bud, see the invoices I sent with the folder they should be in there or I will look and send on to you :=):

 

[NtandoN]

Did you try a water test to see if it is the belt.

Carefully pouring some water on the belt will make the noise go away, you then know its a belt that the problem and not a pulley

:withStu:
Spray some water directly on the belt, then drive and see if the noise persists. If it continues spray on the other belt. If it still persists then it might be the pulleys.