Jeep 3.8 whining noise
#1
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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
thanks
The noise :
https://youtube.com/shorts/E47gV5R20jw?feature=share
Last edited by Achilleas; 01-06-2023 at 12:50 PM.
#3
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It sounds like pully or a one of the items driven by the belt. Maybe water pump, alternator, etc.
#5
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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?
#7
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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 ?
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#8
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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
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#9
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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.
Last edited by Sixty4x4; 01-09-2023 at 12:33 PM.
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#10
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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
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