Squeeking sound when humid or raining

PLACE ANY ISSUES RELATED TO HOW YOUR VAN RUNS. IF IT BOGS, HESITATES, BACKFIRES OR JUST PLAIN RUNS LIKE CRAP...THIS IS THE PLACE FOR IT!
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Topic author
marco10
I am smitten with my van
Posts: 30
Joined: Sat Feb 17, 2007 1:06 pm

Squeeking sound when humid or raining

Post by marco10 »

Hello all. On very humid days, or when my Astro is left on a grass field overnight or when it rains, it makes a squeeking noise when it is running and eventually goes away within 1/2 hour after engine warms up. I am guessing it has something to do with moisture in and around the engine. No sound when it is dry and sunny. Would like to know if anyone else has experienced this and what problem this would indicate. I am inclined to suspect something to do with belts? Any help would be appreciated. Thanks.
2004 Astro, RWD, 3:73 axle/w tow package
LPD Tanny Cooler, Prodigy Brake Controller
Timbren Rear Springs

blacknome
I sleep in my van
Posts: 269
Joined: Mon Jun 18, 2007 12:58 pm

Re: Squeeking sound when humid or raining

Post by blacknome »

sounds like belts, idler pulley, or alt bearing to me. I had chased the same sound in my van for 5 years. New belt every spring would make it better but the noise would always return. In my case it was the alternator bearing ( found it with an automotive stethoscope ) so I left it until the unit failed.

Take off the belt and spin each of the components to feel for any roughness in the bearing
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