Ok, when the engine is cold theres a horrible squeek under the hood and when the engine warms up a little it reduces down to just a squeek squeek squeek squeek. So far I've replaced the belt, two smooth idler pulleys, one ribbed idler pulley, belt tensioner, and the alternator. And it just seems to be getting worse. I guess the only other things it could be are the a/c compressor, power steering, or water pump?? Do any of those typically go before the others? Id really appreciate any help, this is getting reeeeeal embarassing!
Thank you!!

 

I found 1 of my engine hooks in my '05 that was loose, it would squeek and annoy the hell outta me, after about a month I finally found it!

 

Use a length of heater hose as a stethoscope and try to find exactly where the squeak is coming from. Just be careful you don't get it caught in something. It might be the fan clutch.

 

I actually bought a stethoscope but havent had time to use it yet. And I already replaced my fan clutch also. Ahhhhhhhh

 

spray some lubing spray on the belts and the barrings on the water pump,ac compresser etc and see if it stops.

 

It sounds like the A/C compressor... water pumps, and power steering pumps usually don't make too much noise... yet be able to make a squeeling noise. The fan clutch won't ever make a squeeling noise.... unless the belt is slipping on that... but that would be if the belt is too big, which is not your case.

See if the noise changes when you turn on your A/C or defroster...

 

The noise doesn't change one bit with the A/C on.

Thanks guys!


This sucks.

 

One other thing I forgot.... take your serpentine belt off and examine the pullies... you might have a build up of rubber on one of them... or some kind of dirt which can cause slippage or squeaks. I'd recommend spraying them with some brake cleaner, as that will remove all of the contaminants from the pullies (grease, dirt, etc)...

Another though I had could be the water pump because if the bearings go bad it will cause it to squeel... but some don't have bearings... so it's a 50/50 chance it might be that.

 

Awesome!
Thanks Manual!!

 

on my 2001, the factory belt tensioner was over extended to the point where the arm seized into one position and caused a squeak only when starting the engine. new tensioner and a size smaller belt from autozone fixed this.

 

my V6 has a slight skqueal that sounds like the belt when it idles. its not too bad but when im sitting in the parking lot showing off my CAI to my friends with the engine running, its kinda embarassing...

 

My '02 Explorer 4.0 does the exact same thing...did you ever fix the problem?

 

Well I think I found my problem... I added some of that thick STP oil treatment or oil additive and the problem seemed to go away. Now it's been coming and going again. So I guess what I need to do is get my Mobil 1 Full Synthetec in High Mileage version from now on and use the thick STP oil stuff at every oil change now. I guess my engine aint as tight as she used to be.:o

 

it could have someting to do with the cold i live in michigan and every now and then when its below 40 the belt squeeks for about 5-10 mins before it gets warm but if its 50 or warmer the belt makes no squeeking at all...i have no idea why this happens lol.

 

Smart Guy right there Try that...