how do you smoke test the system for leaks? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 12-16-2008, 11:59 PM
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Cool how do you smoke test the system for leaks?

Hey, I am having a really loud squealing noise when my car is cold. It seems to go away when the car warms up. I took it into the local shop yesterday and they said it was vacuum/ intake related. They said they would have to do a leak test and to expect $500.00 to $800.00 for repair! I need to know how to smoke test the system for leaks myself or see if anyone else has had the same issue.

Thanks
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#2 (permalink) Old 12-17-2008, 12:29 AM
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first before you jump to and of that. inspect all of your belts
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#3 (permalink) Old 12-17-2008, 03:12 AM
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Sounds like a belt to me to, as only does it when cold,if it was vaccum it would do it all the time,try new belts 1st.

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#4 (permalink) Old 12-17-2008, 10:22 AM
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if not the belts what should I check next?

It doesn't get worse when I step on the gas. It also sounds kinda like a whistling noise.

Last edited by irisheyeman; 12-17-2008 at 10:37 AM.
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#5 (permalink) Old 12-17-2008, 10:45 AM
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leak on the intake hose or your air box, get someone to rev it whilst you listen for it.

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