# 2000 Mercury Sable coolant tank overflows without overheating

**URL:** <https://community.cartalk.com/t/2000-mercury-sable-coolant-tank-overflows-without-overheating/115678>\
**Category:** Maintenance/Repairs\
**Tags:** mercury, sable, coolant\
**Created:** [April 14, 2018, 6:33pm UTC](https://community.cartalk.com/t/2000-mercury-sable-coolant-tank-overflows-without-overheating/115678 "2018-04-14T18:33:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![PaulCooper](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@PaulCooper](https://community.cartalk.com/u/PaulCooper)\
**Post date:** [April 14, 2018, 6:33pm UTC](https://community.cartalk.com/t/2000-mercury-sable-coolant-tank-overflows-without-overheating/115678/1 "2018-04-14T18:33:06Z")

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Coolant holding tank overflows, engine does not overheat, why is this?

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [April 14, 2018, 6:48pm UTC](https://community.cartalk.com/t/2000-mercury-sable-coolant-tank-overflows-without-overheating/115678/2 "2018-04-14T18:48:30Z")

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Possibly a blown head gasket pressurizing the coolant overflow bottle. Is the coolant in the bottle oily? What engine, and how many miles? Is the check engine light on?