Ok, so when i start my 07 f150 when its cold, theres like a high pitched whine when it idles.. Anyone have any opinions on what it could be. Thanks.$

 

My opinion would be a idler pulley.

 

Would that be a belt or the actual pulley?

 

Probabley the alternater just working to replace that hit the the battery took turning over that cold engine. Should go away in a short time. bubbabud

 

Check the belt tensioner. They like to throw the bearings out of them..the alternator bearings are another common concern we see alot of.. it will charge fine but start out with noise only at idle but over time get progressively louder.

 

And its been getting louder too so ill check all of it out
. Thanks for the help guys!

 

Shouldn't be an issue with the belt, it would just be the pulleys themself, if you were to take your belt off and give them a spin you'll be able to feel/hear if there is a problem. Of course what bud said is a valid possiblity

 

Do you do any off roading. Where water or mud may have gotten in the alternator. Just remove the belt and spin them individually because when running these motors like to carry the noise making it difficult to determine the exact location.. good luck if you have any questions feel free to ask.. I have 12 yrs of working on fords under my belt. Merry Christmas

 

No i dont do any off roading. Okay i'll try it and let you know how it worked thanks. Merry christmas to you too.

 

Hey Nelson what state are you in irrelevant to the thread just seeing if your from Knoxville