# 2012 Chevrolet Cruze smoke under the hood when using the heat

**URL:** <https://community.cartalk.com/t/2012-chevrolet-cruze-smoke-under-the-hood-when-using-the-heat/170833>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, cruze\
**Created:** [October 5, 2020, 3:50am UTC](https://community.cartalk.com/t/2012-chevrolet-cruze-smoke-under-the-hood-when-using-the-heat/170833 "2020-10-05T03:50:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lonny22](https://avatars.discourse-cdn.com/v4/letter/l/dc4da7/32.png) [@Lonny22](https://community.cartalk.com/u/Lonny22)\
**Post date:** [October 5, 2020, 3:50am UTC](https://community.cartalk.com/t/2012-chevrolet-cruze-smoke-under-the-hood-when-using-the-heat/170833/1 "2020-10-05T03:50:24Z")

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Why when using the heat, smoke comes underneath the hood on the left side and Burt fumes comes inside the car?

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**Author:** ![oldnotdeadyet](https://avatars.discourse-cdn.com/v4/letter/o/a6a055/32.png) [@oldnotdeadyet](https://community.cartalk.com/u/oldnotdeadyet)\
**Post date:** [October 5, 2020, 6:30pm UTC](https://community.cartalk.com/t/2012-chevrolet-cruze-smoke-under-the-hood-when-using-the-heat/170833/2 "2020-10-05T18:30:16Z")

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I suspect that a heater hose (after the heater valve) has a small leak. You MUST immediately check your antifreeze level when the engine is cold. Check both the reservoir and open the radiator cap. You do not want to drive if a leak is possible.