Question about 2002 Volvo S60

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It sounds like a belt squeeling but couldn't find a problem. it seemed to be coming from inside the engine so i took off the oil filler cap to see if I could get a better listen ,but the sound disapeared once I loosened the cap.the cap was hard to pul of because there was a vacuum sucking it on, is that normal ???

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  • brentduhaime Feb 06, 2010

    how could I narrow the problem down further without spending too much time on it

  • brentduhaime Feb 07, 2010

    thanks a lot , you've certainly narrowed it down and will help to save a lot of money.Believe it or not my mechanics first option was to change the alternator at a cost of $700.00!!!!

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Yes you should have vacuum when you remove the cap. . If the noise is gone then somewhere you have a vacuum leak. Check all the hoses and possible the valve cover gasket. If you have too much vacuum then its possible the intake gasket is leaking on the internal engine side of the plennum.

Posted on Feb 06, 2010

  • Susan Price Feb 06, 2010

    what we do to look for vacuum leaks is to either spray water around any vacuum sources with the engine running. You should hear the water get pulled in and the enfine will faulter a little



    Or you can spray some brake cleaner. The engine RPM should increase a little. If none of this helps you may have a PCV issue. Get prices on the PCV components and pictures if you can. You may need to have a shop fix this for you since most newer cars have more complicated PCV systems.

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Yes there should be suction. The sound could be a leaky gasket in the gap and that's what you are hearing. Or it would be a pulley that needs lubrication which is common as well.

Posted on Feb 06, 2010

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Posted on Jan 02, 2017

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