# Ping noise in new exhaust system

**URL:** <https://community.cartalk.com/t/ping-noise-in-new-exhaust-system/17443>\
**Category:** Maintenance/Repairs\
**Tags:** exhaustsystems, noises\
**Created:** [July 30, 2008, 6:33pm UTC](https://community.cartalk.com/t/ping-noise-in-new-exhaust-system/17443 "2008-07-30T18:33:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![hondagrl](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@hondagrl](https://community.cartalk.com/u/hondagrl)\
**Post date:** [July 30, 2008, 6:33pm UTC](https://community.cartalk.com/t/ping-noise-in-new-exhaust-system/17443/1 "2008-07-30T18:33:25Z")

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I recently got my exhaust system replaced. After a drive (both long and short) and when I turn my ignition off the exhaust system under my car starts making a “ping” noise. Is this normal? Should I take it back to the mechanic who replaced the exhaust? What do I do?

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [July 30, 2008, 6:40pm UTC](https://community.cartalk.com/t/ping-noise-in-new-exhaust-system/17443/2 "2008-07-30T18:40:22Z")

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Very common. The exhaust is contracting as it cools down, and some part is moving in relation to another part. It’s possible that a clamp or bolt is loose. Maybe the shop that installed it will give it a look-see for free.

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [July 30, 2008, 6:50pm UTC](https://community.cartalk.com/t/ping-noise-in-new-exhaust-system/17443/3 "2008-07-30T18:50:53Z")

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Yes, and as a replacement it might have joints/clamps where the original had welds. Worth a check, but nothing to worry about.