# Noisy Acceleration after Timing Belt Change

**URL:** <https://community.cartalk.com/t/noisy-acceleration-after-timing-belt-change/24900>\
**Category:** Maintenance/Repairs\
**Tags:** belts, timing-belts\
**Created:** [January 14, 2009, 6:29am UTC](https://community.cartalk.com/t/noisy-acceleration-after-timing-belt-change/24900 "2009-01-14T06:29:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![stillwater](https://avatars.discourse-cdn.com/v4/letter/s/eb9ed0/32.png) [@stillwater](https://community.cartalk.com/u/stillwater)\
**Post date:** [January 14, 2009, 6:29am UTC](https://community.cartalk.com/t/noisy-acceleration-after-timing-belt-change/24900/1 "2009-01-14T06:29:28Z")

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I just had my timing belt and balance shaft belt replaced at a mechanic shop. After I picked up the car (01 Honda Accord) there is a very noticeable low hum when accelerating. The acceleration is sluggish. I requested to recheck the alignments of the marks and the belts? tension and they seems ok. What is going wrong?

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [January 14, 2009, 12:40pm UTC](https://community.cartalk.com/t/noisy-acceleration-after-timing-belt-change/24900/2 "2009-01-14T12:40:55Z")

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Good question. The engine should sound and run the same after a timing belt installation as it did before.

Did the mechanic replace anything other than the belts, such as the water pump or tensioner pulley?