94 Limited overheating - JeepForum.com
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post #1 of 6 Old 06-17-2011, 07:46 PM Thread Starter
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1994 ZJ 
Join Date: May 2011
Location: Azle
Posts: 4
94 Limited overheating

I've got a 94 JGC Limited 5.2 that has just started overheating last couple of days. I replaced the thermostat bout a week ago because I thought it had been sticking. It seems to want to run between 230-235 down the freeway with the a/c running and overheats in traffic. It has been over 100 degrees outside but still I know it shouldn't be running thus hot. By the way I'm not losing any fluid so I ruled out leaks or blown head gaskets.

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post #2 of 6 Old 06-17-2011, 07:57 PM
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1995 ZJ 
Join Date: Sep 2009
Location: Austin
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Have you checked your fan clutch for proper operation? You could also have a partial clog in your cooling system (system flush/fill usually fixes that), or a defective cap on your radiator.

1995 ZJ 5.2L V8 318. 230,000 miles and still rollin.

List of parts not replaced yet:
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post #3 of 6 Old 06-17-2011, 08:01 PM Thread Starter
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1994 ZJ 
Join Date: May 2011
Location: Azle
Posts: 4
The fan seems to have plenty of resistance when I check it, but I only have when it's cold. As far as the radiator cap, I havnt noticed any leaks. It's gotten worse last couple of days as far as running hotter.
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post #4 of 6 Old 06-17-2011, 08:47 PM
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1995 ZJ 
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My ZJ in the Houston drought heat isn't faring very well...after a few minutes it goes to 190 and slowly climbs past 210 the longer I drive...though its not very hard driving. My cooling system is working fine, the intense heat and highway traffic was probably just too much for the system.
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post #5 of 6 Old 06-18-2011, 06:24 PM
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1995 ZJ 
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Swap in a 160* stat. It allows the coolant to start flowing earlier and keep the system a little cooler.

95 Limited Chargold ZJ 5.2L -5.5" lift (IRO, Ironman, and RC parts), 33" BFG M/T's, 15x8 procomp crawlers, 242 swap, 2 12" subs, 1000w amp, cherry bomb, full skid package, Kevins rear stealth bumper clone w 3/4" D rings, Rlcwelding front bumper w 3/8" D rings, XRC-8, front tow hooks, 2 daylighter fairlead lights, 2 daylighter windsheild lights, 2 55w driving lights, OBA, Cobra 18 CB, dual 4' whips, RC disconnects, smittybuilt jack, optima yellowtop.

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post #6 of 6 Old 06-18-2011, 11:40 PM
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1993 ZJ 
Join Date: Jun 2011
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We had the same problem with our 1993 for over a year. Just sitting at a drive through window for a few minutes would cause us to overheat and the AC would blow hot air. We just had the transmission rebuilt (this week) and they also replaced a seeping heater hose, the thermostat (and gasket) and flushed the cooling system and it seems to have resolved the issue (knock on wood)

I hope that this helps. Good luck!
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