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Little bit of water seeps out the overflow on first start in the Morning

Tiny
SMOKEESDAD
  • MEMBER
  • 2002 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • 30,000 MILES
When I start my truck in the morning to idle and warm up a little, just a little bit of water seeps out the overflow. It only does this when it's first started, and sometimes not at all. Would I have a thermostat sticking because once the truck is warmed up no more seeping?
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Thursday, January 30th, 2020 AT 6:26 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
This sounds like the beginning of the blown head gasket. does the truck loose coolant? If so here is a guide to help confirm the issue:

https://www.2carpros.com/articles/head-gasket-blown-test

Please run down this guide and report back.
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Thursday, January 30th, 2020 AT 10:30 AM
Tiny
SMOKEESDAD
  • MEMBER
  • 7 POSTS
No it does not lose any coolant when running, only the little bit when I first start it.
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Friday, January 31st, 2020 AT 4:01 AM
Tiny
KEN L
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Okay, it sounds like the radiator cap is bad. I would replace it and see if it still happens. Please let me know.
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Saturday, February 1st, 2020 AT 10:12 AM
Tiny
SMOKEESDAD
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  • 7 POSTS
Already done that.
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Sunday, February 2nd, 2020 AT 4:36 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
When the coolant is seeping out can you try to squeeze the top radiator hose to see if the cooling system is pressurized?
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Monday, February 3rd, 2020 AT 10:37 AM

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