# Coolant seeping out from under my radiator cap

**URL:** <https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, 1500\
**Created:** [December 6, 2009, 11:12am UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406 "2009-12-06T11:12:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sickytwisted](https://avatars.discourse-cdn.com/v4/letter/s/f1d935/32.png) [@sickytwisted](https://community.cartalk.com/u/sickytwisted)\
**Post date:** [December 6, 2009, 11:12am UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406/1 "2009-12-06T11:12:58Z")

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I recently replaced some leaky radiator hoses and now, I have coolant seeping out from under the radiator cap. Not while the engine is running, but as soon as I turn my vehicle off. I also noticed that my reservoir tank remains consitently just above where the coolant should be.

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [December 6, 2009, 1:02pm UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406/2 "2009-12-06T13:02:49Z")

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Check the level of coolant in the RADIATOR. Install a new radiator cap. Monitor.

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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:** [December 6, 2009, 1:03pm UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406/3 "2009-12-06T13:03:19Z")

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Replace the radiator cap.

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**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\
**Post date:** [December 6, 2009, 4:46pm UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406/4 "2009-12-06T16:46:01Z")

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Have radiator “sniffed” for combustion gas…(blown head gasket)

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**Author:** ![rocketman](https://avatars.discourse-cdn.com/v4/letter/r/eada6e/32.png) [@rocketman](https://community.cartalk.com/u/rocketman)\
**Post date:** [December 6, 2009, 5:17pm UTC](https://community.cartalk.com/t/coolant-seeping-out-from-under-my-radiator-cap/40406/5 "2009-12-06T17:17:37Z")

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Sounds like the rubber gasket on the cap is shot . . . get a new cap with gasket and keep an eye on your coolant level. Rocketman