I have an 04 F150 XLT 4.6L 4x2
I've noticed a screeching noise in the engine compartment when the engine is cold. I heard the noise coming from a fly wheel. It's the furthest one on the right, at least half way down from the top. I put WD-40 on it and it stops for about 2 minutes then the screeching noise comes back. what can I do? what does this pulley drive?

 

have you tried replacing the belt or spraying BELT DRESSING on it? i think thats the power steering

 

no I haven't i thought there might be something out their for the belt but was unsure. The belt is in good shape, I think it is the pulley thats making the noise. like the bearing or something just is grinding

 

you should be able to see what the pulley goes to, is it flat or is it ribbed???

 

I just went to O'Reily and they said that it was the power steering pump. I got some belt dressing and it worked for the first 2 minutes. The belt is in good shape. He recommended replacing the idler and then the pump. If one fix doesn't work.

 

how many miles are on the truck? i dont think the pump should need replacing just yet, are your sure the belts tight?

 

The truck has about 60,000 miles on it. The belt seems fine.

 

hmm, my buddy had a GEO and we tried EVERYTHING to get the belt to stop squeaking, even tho it was a TINY belt i think it was only a K3 and only had 3 pulleys i think, eitherway, it was rediculous, we replaced all the pulleys (correct size) and the belt (also correct) and still squeaked, sprayed dressing on it, still squeaked, we finally gave up and he drove it squeaking, we finally accepted that at 203k miles maybe thats what it was gonna do

 

Interesting. I may just let the dealer look at it. It's just that the noise has become louder and it's annoying.