Noise under the hood

[darrell8]

This morning when I started my truck I left it running for about 8 min to let it defrost. When I came back out I noticed a whisling noise coming from under the hood. It was loud. I popped the hood and it was hard to say where it was coming from but I think it may have been in the altinator. Once I started home and stoped at the first red light it had stopped. I no when you had it in park and got on the pedal it would stop till it went back to idle but at the light it was not making any noise. This afternoon I started it and it didnt do it. You think it could be a bearing in the altinator on the belt pully? Again I am not sure it was coming from the altinator just sounded like it.

Thanks

[no-tel-in]

do you think it could be coming from the turbo? what did your exhause sound like at that point? could be EBPV on these cooler mornings

[darrell8]

sorry for being dumb but what is EBPV? I will be onist I thought it was the intercooler tube boot but I shook it and id didnt change the sound. I just put a brand new turbo, #3 injector, and oil ? (something) valve in about a month and half ago.

[darrell8]

by the way this is a 06 f350 6.0 psd

[no-tel-in]

Well 6.0s don't have ebpv, I assumed it was a 7.3. but I really don't know hopefully someone more familiar with the 6.0 will come along.

[dannyboy950]

It could be the belt the alternator bearings or any of the idler pulleys or tensioner pully,yer just gonna have to narrom down where it is comeing from. You can use a stethascope or the handle of a big screw driver against yer ear.Either way be real carefull around those moveing parts. You can also take the belt off and rool the pulleys by hand and see how they feel.

[darrell8]

If it was the bearing in the alternator can you replace the bearing or do you have to buy a new alternator?

[STORMTROOPIN]

its more than likely the idler pully. thats where my money is. If it is good luck getin that belt off, you might want to recruit a buddy to help.

[dannyboy950]

All right a little trick with that belt. First get ya a flash light and look down towards the bottom of the tensioner. You should see a little shiny tin latch. If it is there you can grab the belt between the alternator and the tensioner and pull toward the fender untill you hear the latch click. This will hold the tensioner so that you can slip the belt off the alternator pulley. By the way ya need to be kinda strong to do this. I am 60 is and it takes all I got. LOL