# 2016 Hyundai Elantra GT - Rattles when accelerating

**URL:** <https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai\
**Created:** [April 19, 2022, 6:32pm UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663 "2022-04-19T18:32:52Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![YolandaDCOCROFT](https://avatars.discourse-cdn.com/v4/letter/y/a9a28c/32.png) [@YolandaDCOCROFT](https://community.cartalk.com/u/YolandaDCOCROFT)\
**Post date:** [April 19, 2022, 6:32pm UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/1 "2022-04-19T18:32:52Z")

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rattle with acceloration

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**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, 2022, 7:22pm UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/2 "2022-04-19T19:22:12Z")

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Could be a loose exhaust heat shield.

Tester

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [April 19, 2022, 8:29pm UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/3 "2022-04-19T20:29:08Z")

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> [@Tester](#):
>
> Could be a loose exhaust heat shield.

+1  
Or, it is possible that the engine is “pinging”. The OP should have his mechanic check for any loose parts on the exhaust system, and if that doesn’t yield a solution, then he should check to see whether the knock sensor is working.

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**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, 2022, 8:33pm UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/4 "2022-04-19T20:33:56Z")

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2014 Elantra anti-knock/detonation sensor.

![image](https://global.discourse-cdn.com/cartalk/original/3X/c/a/cab835323da299011e5f88e623639f56ebe1106d.jpeg)

Tester

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [April 20, 2022, 12:42am UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/5 "2022-04-20T00:42:02Z")

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First step, check if you can wiggle the heat shield under the cat. Caution, could be very hot, best to do that when the engine is cold.

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**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\
**Post date:** [April 22, 2022, 1:32am UTC](https://community.cartalk.com/t/2016-hyundai-elantra-gt-rattles-when-accelerating/183663/6 "2022-04-22T01:32:31Z")

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A rubber mallet or a piece of 2X4 is helpful. Fist, too. Gloves on hands always a good thing here, and eye protection.