# Nasty noise from a pulley

**URL:** <https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967>\
**Category:** Maintenance/Repairs\
**Tags:** dakota, dodge\
**Created:** [April 28, 2013, 12:13am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967 "2013-04-28T00:13:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![aggressiveseek](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@aggressiveseek](https://community.cartalk.com/u/aggressiveseek)\
**Post date:** [April 28, 2013, 12:13am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967/1 "2013-04-28T00:13:23Z")

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My tensioner pulley is already shaking but when the ac clutch is engaged the tensioner starts to shake even more and it starts to make a clunking noise extremely loud and fast. I also noticed that the crank pulley is shaking quite a bit too so i don’t know if that has anything to do with it.

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**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [April 28, 2013, 12:52am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967/2 "2013-04-28T00:52:37Z")

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Sounds like it is time to replace the tensioner pully.Start with part one, move on to part 2 if needed.

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**Author:** ![aggressiveseek](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@aggressiveseek](https://community.cartalk.com/u/aggressiveseek)\
**Post date:** [April 28, 2013, 9:34am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967/3 "2013-04-28T09:34:02Z")

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I have already replaced the tensioner pulley, idler pulley, belt, and the water pump is new as well. From talking to mechanic shops they say it is my a/c but I don’t see how it could be. The a/c blows cold still but I forgot to mention the noise only comes on when the a/c is on but the pulley is shaking like crazy the whole time.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [April 28, 2013, 10:27am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967/4 "2013-04-28T10:27:22Z")

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You really need to get that harmonic balancer (crank pulley) looked at. If the balancer is loose on the crankshaft this can be engine damaging; if not already.

A loose balancer can wallow out the keyway in the crank and if this happens even a new key and balancer will cure the problem. It would require a new crank kit or possibly welding the balancer in place. The latter would mean that you would pretty much write off the engine as to future repairs.

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**Author:** ![aggressiveseek](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@aggressiveseek](https://community.cartalk.com/u/aggressiveseek)\
**Post date:** [April 28, 2013, 11:24am UTC](https://community.cartalk.com/t/nasty-noise-from-a-pulley/78967/5 "2013-04-28T11:24:48Z")

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Yea I will have that looked at thank you.