Bad Thermostat - JeepForum.com

 
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post #1 of 5 Old 11-18-2013, 10:39 PM Thread Starter
NoliftZJ
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1996 ZJ 
 
Join Date: Nov 2013
Location: Apache Junction
Posts: 10
Bad Thermostat

So I had a gasket leak at the thermostat so I might as well replace the thermostat while replacing the gasket. My thermostat was stuck open! I'm not sure what the repercussions could be, but I'm flushing the system and installing a new thermostat. Here's a pic:

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post #2 of 5 Old 11-18-2013, 11:02 PM
JasonStebbins
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1997 ZJ 
 
Join Date: Jan 2009
Posts: 3,138
I went with the Stant Superstat and it works great all year round. Nothing wrong with flushing the system. A stuck open thermostat will yield lukewarm heat through the vents and may cause overheating.

195 degree thermostat is OEM.

Poop
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post #3 of 5 Old 11-18-2013, 11:10 PM Thread Starter
NoliftZJ
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1996 ZJ 
 
Join Date: Nov 2013
Location: Apache Junction
Posts: 10
I replaced with a Murray Temperature Control Ultra - Ultrastat Thermostat 195 degree. Thanks for the input.
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post #4 of 5 Old 11-19-2013, 01:14 AM
jnicewan
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1995 ZJ 
 
Join Date: Dec 2010
Location: Norman
Posts: 2,348
That's one of those "fail-safe" thermostats. It is stuck open but that brass colored clip is whats holding it open. Those are purposely made to hold the thermostat open in the event of a failure/overheat. Now that I think about it I have never removed one of those that was not in the fail-safe failure position, they seem to "fail" a lot. I would get a regular OEM stat to replace it.

With a good operating thermostat you should notice better fuel economy since the engine will run at operating temps. You should also have a better working and hotter heater.
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post #5 of 5 Old 11-19-2013, 09:05 AM Thread Starter
NoliftZJ
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Location: Apache Junction
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Sounds good! Thanks!
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