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931 engine squeaks

 
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mattaebersold  



Joined: 12 Dec 2018
Posts: 15
Location: Washington, United States

PostPosted: Fri Jul 26, 2019 2:32 am    Post subject: 931 engine squeaks Reply with quote

I recorded a video of my 931 engine running (trying to haha). Like the video states, I have another 931 engine out of the car now that I'm rebuilding, which is going well. I'm asking about these squeaks for a couple reasons:

1. I would like to know the source of the squeaking, since I'll be reusing some external engine components after my rebuild is done (turbo, alternator, AC, etc)

2. Have any of you experienced squeaks like this? Curious if the cause is turbo-specific or just in general?

Thoughts are:
- turbo?
- bearings in pulleys?

https://www.youtube.com/watch?v=FK7prhFEbFI&feature=youtu.be
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1980 931
2005 Touareg V8
2006 530xi Wagon
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1992
Location: MI

PostPosted: Fri Jul 26, 2019 2:51 am    Post subject: Reply with quote

Spray some water, or better yet belt dressing, on the alternator belt while its running and see if it goes away..
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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 1060
Location: The Netherlands

PostPosted: Fri Jul 26, 2019 7:24 am    Post subject: Reply with quote

do a short test without the v-belt and you ensure it is not the alternator or the waterpump.

If the sound has gone, then it is or your alternator or your waterpump
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morghen  



Joined: 21 Jan 2005
Posts: 8177
Location: Romania

PostPosted: Fri Jul 26, 2019 3:26 pm    Post subject: Reply with quote

Sounds like waterpump or alternator bearings...but maybe you overtightened the timing belt also?
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mattaebersold  



Joined: 12 Dec 2018
Posts: 15
Location: Washington, United States

PostPosted: Sat Jul 27, 2019 2:29 am    Post subject: Reply with quote

Thanks all! I'll try those things to see if the sound is gone
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2005 Touareg V8
2006 530xi Wagon
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Johann  



Joined: 07 Aug 2016
Posts: 221
Location: Netherlands

PostPosted: Sun Jul 28, 2019 2:47 am    Post subject: Reply with quote

This sounds like a waterpump or tensioner pulley.
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