# Squeaking/whinging **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** cherokee, jeep\ **Created:** [April 19, 2020, 12:01am UTC](https://community.cartalk.com/t/squeaking-whinging/163053 "2020-04-19T00:01:19Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Aaron\_Ingram](https://avatars.discourse-cdn.com/v4/letter/a/ed8c4c/32.png) [@Aaron\_Ingram](https://community.cartalk.com/u/Aaron_Ingram)\ **Post date:** [April 19, 2020, 12:01am UTC](https://community.cartalk.com/t/squeaking-whinging/163053/1 "2020-04-19T00:01:19Z")
Hi i have a 2001 jeep Cherokee sport 4.0 and my serpentine belt squeaks i have checked the belt and tension those seem fine but when it squeaks my voltage drops and especially when i have my ac on does this sound like a bad pulley alignment and is causing the belt to slip or maybe a bad alternator? Im not very knowing about vehicles any input would be appreciated. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [April 19, 2020, 12:08am UTC](https://community.cartalk.com/t/squeaking-whinging/163053/2 "2020-04-19T00:08:27Z")
You can’t determine if a serpentine belt is worn by looking at it. > **[Tech Feature: Why Aftermarket Belts are Lasting Longer](https://www.underhoodservice.com/tech-feature-why-aftermarket-belts-are-lasting-longer/)** > > Serpentine belts made of EPDM may last up to 100,000 miles or more before they have to be replaced. But that doesn't mean they will last forever. A serpentine belt that's aging or slipping may develop a hard glazed surface that makes the belt noisy.... Replace the serpentine belt, and the noise will probably stop. Tester ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [April 19, 2020, 3:54am UTC](https://community.cartalk.com/t/squeaking-whinging/163053/3 "2020-04-19T03:54:54Z")
The belt isn’t tight enough, tighten the belt. I have seen a number of Cherokees with belt squeal, it is difficult to judge the belt tension when the pulleys are so close together but the problem was always that the belt was not tight enough.