Mechanics

HOW DO I DIFFERENTIATE A SOUND THAT MAY BE A BAD "AIR PUMP" FROM ANOTHER TYPE OF NOISE AT STARTUP?

2000 SAAB 9-3 • 125,000 miles

It does seem to be at startup. It is sort of a "stress" sound. It isn't a whine, not a grinding or clanking. A steady sound and seems to go away after a minute or two. Usually after the car has been sitting. I have been advised it might be an "air pump" but was also told it might be a clogged oil screen. Any good way to make a best first stab at a fix? The air pump supposedly is not urgent but the clogged screen is worrisome to me. Thank you
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Annie a
March 30, 2012.




Is air pump accessible under open hood? Use a listening device lie auto stethoscope to check it out? $5 at harbor freight. Or a vac wand us useful for directional sound locating.

Tiny
Fixitmr
Mar 30, 2012.
Why worry about oil screen? If oil pressure is ok it's ok.
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Tiny
Fixitmr
Mar 30, 2012.
Un plug the air pump and see if the noise isn't there

Djcl
Mar 30, 2012.
Oh, it's an electric pump not belt driven.

Tiny
Fixitmr
Mar 30, 2012.

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