# 2015 Hyundai Accent - Coolant issue

**URL:** <https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai\
**Created:** [March 16, 2022, 6:20pm UTC](https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018 "2022-03-16T18:20:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![AnandHarryChristy](https://avatars.discourse-cdn.com/v4/letter/a/ac91a4/32.png) [@AnandHarryChristy](https://community.cartalk.com/u/AnandHarryChristy)\
**Post date:** [March 16, 2022, 6:20pm UTC](https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018/1 "2022-03-16T18:20:50Z")

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My i20 Coolant overflowing from expansion tank . Water pump, thermostat and radiator have been changed. What do i do to stop this problem

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [March 16, 2022, 7:29pm UTC](https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018/2 "2022-03-16T19:29:16Z")

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Have it checked for a failed head gasket.

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**Author:** ![mhager\_179785](https://avatars.discourse-cdn.com/v4/letter/m/aeb1de/32.png) [@mhager\_179785](https://community.cartalk.com/u/mhager_179785)\
**Post date:** [March 18, 2022, 1:18am UTC](https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018/3 "2022-03-18T01:18:45Z")

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You might want to have the cap to your expansion tank pressure tested. It might not be sealing properly.

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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:** [March 18, 2022, 1:33am UTC](https://community.cartalk.com/t/2015-hyundai-accent-coolant-issue/183018/4 "2022-03-18T01:33:23Z")

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Remove the radiator cap when the engine is cold.

![image](https://global.discourse-cdn.com/cartalk/original/3X/6/5/6591f88f45ccbfe295ce07dd3bf229843353581c.png)

Look if coolant can be seen.

If not, add water until it can be seen.

Start the engine, and as the engine idles, watch the coolant to see if any bubbles begin to form.

[![](https://global.discourse-cdn.com/cartalk/original/3X/d/5/d59119110093c6b92ce3ea1ff736cd8a56e45153.jpeg "radiator - blown head gasket?") ](https://www.youtube.com/watch?v=7UyhjT7nWY0)

If they do, that indicates a blown head gasket.

Tester