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Pumping sound 900 1994

posted by  Andrew in AL on  Sat Oct 17 11:48 CST 2009
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last visit: Fri Oct 24 06:17 CST 2014
[RELATED]

The wife's '94 940 turbo has had a sound (for quite a spell now) that sounds like a low pumping sound when idling, fairly rapid in cadence ...right in line with engine speed. It runs great @ 270K, and the sound goes away once you take off.

Just installed a new compressor, but no belt yet on that ...still have to add freon ...so that eliminates that.

I keep wondering if it might be crankcase ventilation connected ...but I was able to blow easily through the breather box.

What might I be looking for?

Thank you very much for any ideas.



' Of all bad men religious bad men are the worst. '' (C S Lewis ; on Evil Men) 89 764 (170K), '94 940T (265K), 92 245 (150K)






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