Drop Tine

Would an idler pulley or belt tensioner make an engine whine. I have an 07 5.4 and it really makes a crappy whine around2000 rpm and up. Im starting to think its one those2 things. Any input would be great. Thank u

lariat05.4

It could be either but my bet would be the alternator. Mine does it as well but usually only when it's a bit colder out, not all the time. Does it do it when you rev it? Have someone listen with the good open if it does.

Drop Tine

Yes it does it all the time it just started happening about a month ago. Its a pretty loud and annoying scratchy whine to.

cherokee jim

Sounds like bearings.Idler,alt,water pump.Get a long reach screw driver on each and track it down.

BlackLariat4x4

It's most likely your alternator, but for only $50 you can replace the tensioner and pulley. This will get rid of the whine, because mine is gone after replacing all 3.

Black_05f150

Idler tension arm. The whole thing. The bearings in it are probably shot. Exact same problem I had about 3 weeks ago.

Drop Tine

Ok ill check it out. Is it expensive and hard to replace?

Black_05f150

No it was like 30 bucks and took me 30 minutes

Drop Tine

Ok thank u