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whine from engine bay on very cold start

34894 Views 20 Replies 14 Participants Last post by  traildogck
so as the temps get colder, into the teens around here at night, my car has been making an odd whining noise when i first start her up in the morning. i don't know how to describe the noise, other than that it sounds like a stall horn in a cessna, though only anyone whose flown in one would know what i'm talking about.. it's not a super loud whine, but it's definitely audible over the engine noise. the pitch of the noise goes up and down with RPMs, but oddly, it also is effected simply by moving the steering wheel. stumped as to where to even start looking, but i almost sounds like a very mildly squeaking belt, if that is possible.. it goes away after the car warms up a bit, then runs perfect after that.

wondering if anyone else has run into this?

what i need to do is wait until this weekend and pop the hood after i start it to see where the noise is coming from. i have not had time to do this in the mornings before work... so really just putting "feelers" out there to see if anyone else has seen this, i will post more info tomorrow.

what i ultimately need to do is put the ol scoob in a garage! :D too bad i don't have one.
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get a $5 mechanic's stethoscope and use it to pinpoint source. my guess would be bearings on some accessory, probably alternator. listen to alt with the stethoscope when the whine is occurring.
one easy way to check if it's due to a loose belt is to rev car hard in neutral or park and see what happens. this is worst-case scenario for slipping belt since engine accelerates much faster when freed of load of drivetrain and so belt slips worst then, at least momentarily.

you shouldn't have any bearing issues--wheel bearings or alternator or whatever...on a car with 33K Km, but it does sound to me like your noise has to do with one of the accessories driven by the belt.
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