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Solved Overheating/coolant overflow

johnnyboxturtle

New Member
Joined
August 13, 2017
Messages
4
Reaction score
0
City, State
Portland, oregon
Year, Model & Trim Level
1992 explorer xl
I have a 92 explorer. It overheated yesterday after driving around a hilly park at slow speeds for about a half hour. I cooked it down and put water and what coolant I had in it. Now idling in the driveway it starts to heat up after 5 minutes and coolant starts overflowing from the fill tank. The radiator isn't hot and after I shut it off if I vent the radiator coolant starts overflowing from the fill tank again. I'm thinking it could be a water pump issue but am not very knowledgeable. Am I looking in the right direction?
 


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roscoe 0202

Well-Known Member
Joined
February 3, 2014
Messages
340
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76
City, State
salt lake city utah
Year, Model & Trim Level
1999 explorer sport
sounds like a thermostat stuck closed
roscoe
 




2stroke

Elite Explorer
Joined
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Location
55302
City, State
Annandale, MN
Year, Model & Trim Level
1993 Ford Explorer Sport
Pull your thermostat out, and run it will the radiator cap off and full of coolant. See if bubbles rise up, especially when you rev it up a little.
 




Anime

EF YEAH!!
Elite Explorer
Joined
November 6, 2000
Messages
5,441
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Year, Model & Trim Level
2018 EX Sport Concept
Yeah, it's usually a stuck thermostat.

I suggest replacing with the 195 degree Stant Superstat, though whatever you can get works in the short term.
 




Centaurus5.0

Explorer Addict
Joined
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Year, Model & Trim Level
96'
A bad radiator cap will do that.

If its stuck open, the system can't build pressure (will over heat) and will immediately bubble into the overflow when the engine is running.
 




johnnyboxturtle

New Member
Joined
August 13, 2017
Messages
4
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City, State
Portland, oregon
Year, Model & Trim Level
1992 explorer xl
Thank you guys. I called my dad and he suggested the thermostat. I replaced it the same day and it's running at a proper temp. Been too busy to post. Thank you guys for your time and knowledge.
 




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