'94 Jeep Grand Cherokee Limited overheating - JeepForum.com
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post #1 of 5 Old 07-15-2014, 04:12 PM Thread Starter
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1994 ZJ 
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'94 Jeep Grand Cherokee Limited overheating

I own a 4x4 1994 jeep grand Cherokee limited V8. Just recently bought her and she runs and drives great. Just need to tighten down the valve cover gaskets because she's leaking a bit of oil from there and no other major problems have occurred, except she started over heating this weekend. I am not low on coolant, nor oil and I have no leaks. My father who is a mechanic has said that it may be the water pump but I am not sure. Stationed away from home so I can't just have him look at her and I don't want to take it to the shop because money's tight as an enlisted. I know basic mechanic skills but they don't help in this situation. I was driving back onto base after driving maybe 25 minutes, granted there are some big hills out here, but she overheated and cut off so I left her there over night.
All my fluids were and still are good. The next day I drive her back onto base, maybe a 5-10 minute drive from where I was and she was pretty close to the Orange again. Doing about 50 mph here but didn't have a choice as it was a one lane very busy road.
I really have no clue as to what could be causing this because just the week before I drove her for hours with no problems.
Any help would be appreciated thank you.

derekkoop is offline  
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post #2 of 5 Old 07-15-2014, 04:16 PM
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Whatever you have to do,put a tstat in it too
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post #3 of 5 Old 07-15-2014, 04:30 PM
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Originally Posted by dusterdude View Post
Whatever you have to do,put a tstat in it too
That's where you should start. If it still does it after that then flush the radiator. Did turning the heat in the cab on high help bring it down?

Kiss my shiny metal bumper.
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post #4 of 5 Old 07-15-2014, 04:45 PM
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A new T stat and fresh coolant then burp it after to get the air out. Air can cause it to overheat. Don't get a cheap T stat. Do not use Failsafe brands. Use a Mopar, Stant or something of quality.
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post #5 of 5 Old 07-15-2014, 05:57 PM
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Give us some more info about when its overheating. You say it was close to the orange while driving at 50mph. Does it over heat at idle more? Less? More at hw speeds?

Usually if it over heats all the time or more at hw speeds/under load it could be the tstat, water pump, or (most likely) the radiator.

If it over heats at idle only then its most likely a bad cooling fan clutch.

If she overheated so much that it shut off, thats not good at all.

1994 ZJ-I6 w/216,000 mi
1998 ZJ 5.9 w/65,155 mi Slate Black
2004 KJ w/90,300 mi
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grand cherokee , overheating

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