[94 Merc XR7]

ok it just started...

now that its cold out when i drive while its not completely warmed up i hear a LOUD like screech...almost like static in a microphone (usually happens at around 1800 k or so

but when the car warms up it goes away

what the hell is that noise and what is making it?

 

[FordMan77]

Maybe the belt is slipping?

 

[Uncaged 94]

It's probably the idler pulley, I read in a service bulliten that the bearings go bad and it squeels in cold weather. Mine was doing it last winter. I pulled mine off and sure enough, the bearing was binding. I replaced it and the noise stopped. It's cheap ( less than 15.00 bucks ) and easy to replace. Just remove the belt, unbolt the pulley and change it, then replace the belt. A 10 min. job. I tried shooting WD-40 on it for a while, but just made a mess and the noise returned after a day or two. So that 's what I would check. And like FordMan said, if the belt is slipping, check the belt tensioner. Now mine is starting to make a little noise with these extremely low temp.. Good Luck

 

[ITT-BIRD]

It's cheap ( less than 15.00 bucks ) Good Luck

new idler?

 

[cougar_ricer]

Mine is doing the same thing as well in cold weather... very loud screech for a few seconds... then it stops after it idles for a minute or two. Figured it was belt/pulley related. Now I know

 

[Uncaged 94]

ITT-Bird--Yea man, I justed pulled up the receipt, I got it at Autozone. It was new for $11.99.

 

[digex]

Is that the pulley that keeps tension on the belt or something else?

 

[Rolling-Thunder]

There's two pullies that usually squeak over time.

The idler pulley and the tensioner pulley.

Ford sells an improved pulley that fits both locations, and the pulley costs around $11 from Dan Newman.