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Old 07-02-2019, 06:55 PM
Join Date: Jun 2017
Location: Australia
Posts: 146
FourPointEight-is is on a distinguished road
Exclamation PS Pump pulley noise

I noticed this noise when I was replacing the tensioner, pulley and belt in my 4.8is (2005).

https://streamable.com/z3iy4 the noise is when rotating it side to side quickly. It spins smoothly and I don’t feel any notching in the bearing. There is also no front to back shaft play.

Is that bad? None of the other pulleys make any noises.

The main reason why I replaced these parts it’s because the belt was squeaking. The squeak is completely gone now.

Last edited by FourPointEight-is; 07-02-2019 at 07:02 PM.
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Old 07-03-2019, 02:26 AM
andrewwynn's Avatar
Join Date: Jun 2015
Location: Racine, WI
Posts: 6,323
andrewwynn is on a distinguished road
PS Pump pulley noise

That is demonstrating slack inside I'm not aware if that is just normal. The pump only normally goes one direction.
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)

Last edited by andrewwynn; 07-03-2019 at 11:45 AM.
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Old 07-06-2019, 04:00 AM
Join Date: Apr 2015
Location: Sacramento
Posts: 142
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It sounds like gear slop from normal wear. I wouldn’t worry about it. The failure point in the pump is usually the bearing. If it spins smoothly, then you’re fine.
2005 X5 4.4i SterlingGrau, Sport Package, DSP
Build 3/12/2005

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