post #1 of Old 09-15-2012, 04:39 PM Thread Starter
Roberthhhhh
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1995 ZJ 
 
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Overheating wtf!!

Ive got a 95 5.2 and cannot figure out why it wants to run hot!
Ive replaced the radiator, coolant sensor, thermostat, and did a tarus fan conversion. The weird thing is yesterday when I drove it, it was about 99 degres outside and i drove it for about an hour with no problem, left it parked for about an hour then 20 min into another drive it went up to 3/4 mark and i let it sit for another couple hours and then it ran normal again just under half.. I cant figure this out why it runs hot sometimes but other times it doesnt.. PLEASE HELP WITH ANY INPUT.. Thanks

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post #2 of Old 09-15-2012, 04:56 PM
dusterdude
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I swear it sounds like the tstat is sticking
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post #3 of Old 09-15-2012, 05:09 PM
dylantheheeler
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Did you burp the cooling system after changing parts?

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post #4 of Old 09-15-2012, 09:38 PM Thread Starter
Roberthhhhh
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Quote:
Originally Posted by dusterdude View Post
I swear it sounds like the tstat is sticking
Ive replaced it twice to make sure
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post #5 of Old 09-15-2012, 09:39 PM Thread Starter
Roberthhhhh
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Quote:
Originally Posted by dylantheheeler View Post
Did you burp the cooling system after changing parts?
Yes I have
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post #6 of Old 09-15-2012, 09:48 PM
Cameleer
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Does it only heat up when you're driving slow?
When it's hot, will it cool back down when you drive fast?
Where you having the same problem before you did all of that work to it?

Only those who will risk going too far
can possibly find out how far one can go.
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post #7 of Old 09-17-2012, 12:25 AM Thread Starter
Roberthhhhh
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Just in normal traffic. About a month before the work I cracked my radiator but it didn't overheat so I doubt head gaskets. And its got an electric fan so even slow traffic shouldn't matter? I don't really understand why jeep engine bays are like ovens! It's insane. LOL
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post #8 of Old 09-17-2012, 12:27 AM Thread Starter
Roberthhhhh
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But yes if I can keep it moving I can usually cool it back down. I've thought water pump but it was replaced maybe 10 months ago
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post #9 of Old 09-17-2012, 01:23 AM
moggie99
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Maybe that fan isn't working - so that there is only a significant airflow when moving at higher speed.

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post #10 of Old 09-17-2012, 10:29 AM
Cameleer
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Quote:
Originally Posted by Roberthhhhh View Post
But yes if I can keep it moving I can usually cool it back down. I've thought water pump but it was replaced maybe 10 months ago
Sounds like an air flow problem.
How well did you get that Taurus fan shroud to fit?
Do you have the fan low speed and high speed hooked up, and if so, how are they being controlled?

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post #11 of Old 09-17-2012, 08:16 PM Thread Starter
Roberthhhhh
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The fan is flush on the rad. And covers about 85-90% of it. Low speed is on sensor and ac to come on automatic and high speed is a inside cab switch. It feels like its pulling a lot and when I put a piece of cardboard about 12in away from grille it sucks it right up against it. But if it was fan that wouldn't explain why it only happens every now and again.
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post #12 of Old 09-18-2012, 09:30 AM
ratmonkey
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Get the rad properly shrouded. And make absolutely sure your temp switch is working.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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