Achilleas

Hey guys , so my new to me 2008 Jeep jk started making this whinning noise from somewhere inside the engine (its not a pulley from the belt or tensioner) , does anyone have any idea what it could be ?
thanks

The noise :

https://youtube.com/shorts/E47gV5R20jw?feature=share

Sixty4x4

Is it auto? Did you remove the belt to eliminate the front rotating assembly?

Achilleas

thanks for the reply , it is a 2008 Jeep jk with auto transmission, unfortunately it is not a pulley and the noise is located somewhere inside the engine

user 729872082

It sounds like pully or a one of the items driven by the belt. Maybe water pump, alternator, etc.

Sixty4x4

Achilles - it sounds like a rotating scraping sound so my best guess is to eliminate the rotating assembly then go into the torque converter flex plate area. Any foreign objects wrapped around the bottom pulley etc?

Achilleas

thanks for the reply !

Achilleas

Thanks for the answer ! I took it to my mechanic and he said it’s coming from the crankshaft , and not from any pulley on the belt area , it’s just odd to me that such a sound is coming from the Crankshaft with no ticking , any guess what it could be ?

Achilleas

Hey guys , the cause of the sound was a bad starter , after a couple days that the noise started the starter stopped working , after removing the starter something was loose inside and was causing that sound

Sixty4x4

Aha! near the TC area. Starter was probably staying engaged. If you used the Jeep with bad starter still engaged it was probably spinning about 10 times faster than the engine rpm.

Mark Doiron

Thanks for closing the loop. I had the starter stay engaged back in the 60s with my VW Karmann Ghia. It didn't make noise; the starter stopped working. It was a mass of metal chunks inside the starter housing. I poured the chunks that fell out back into the housing and screwed it back together. I remember feeling a bit guilty turning it in to retrieve my core charge. No way it was rebuildable.

BTW, next time you're chasing down a whine, suggest you use a mechanic's stethoscope. They're quite inexpensive and easily found at most auto parts stores ...

https://www.oreillyauto.com/detail/c...pe/pfm0/w80582