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
Avatar
ANNIE A
  • MEMBER
  • 1 POST
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
Mar 30, 2012 at 1:37 PM
Advertisement
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
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.
Mar 30, 2012 at 3:23 PM
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
why worry about oil screen? if oil pressure is ok it's ok.
Mar 30, 2012 at 3:26 PM
Avatar
DJCL
  • ✓ASE Certified Mechanic
  • 767 POSTS
  • ASE Certified Mechanic
Un plug the air pump and see if the noise isn't there
Mar 30, 2012 at 5:00 PM
Avatar
FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
oh, it's an electric pump not belt driven.
Mar 30, 2012 at 9:49 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.