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High Pitch Sound from Engine

6K views 21 replies 7 participants last post by  Ghost202 
#1 ·
I recently notice a high pitch sound coming from the engine when I start up in the morning and start driving.
Kinda sounds like a supercharger when driving I determine that it's coming from the belts. It is a noticeable sound and it's bugging me.

What can it be?
 
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#11 ·
Thank you Kori I will be going to the dealer this weekend. I have a question I have a 2016 TH I would like to know what package I have and what it covers. I also never got my GPS Connected from the dealer due to the fact the sale person lied to me saying it was install and active and when I went back to the dealer they wanted to charge me $500 to active it.
 
#17 ·
Update:

Took my TH to the dealer on Sat. in the morning, I called the dealer in the afternoon to get the status on my TH. The service rep. inform me that they checked the belts, pulleys, and alternator no issue the service tech informed me that it might be a problem internally of the engine and that he would need to keep it until Mon. Well, Mon. came and I called this afternoon to get an update and I was informed that my service rep was off and that they still can't figure the issue and would need to keep it again. Now I am wondering what it could be.
 
#19 ·
How many miles are on your Cherokee. I had the issue with my old Patriot at 90k. Alternators have a freewheel mechanism that allows it to continue spinning faster when your RPMs drop, which is great to keep it from wasting potential energy from the momentum, but that is also the cause of premature failure on them as well.


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#20 ·
Would have guessed a vacuum/hose
 
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