Overheating but not overheating? - Page 2 - JeepForum.com
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post #16 of 19 Old 03-31-2013, 10:28 AM
AZ Jeff
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Quote:
Originally Posted by Motorcharge View Post
I've since replaced the radiator and aux fan. Backflushed the system prior to installing the new radiator and backflushed the heater core again on it's own. New rad is in, aux fan works. Same situation. Put an IR gun on it today, it's definitely not running hot or anywhere close to what the gauge is reading.
So now you have confirmed you have a guage problem. As others suggested, the cheaper of the two major elements of the temperature guage system is the sender. Get a new one, and preferably from Mopar, as it's most likely to be properly calibrated to work with a known good guage correctly.


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I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
So...I stick around and give advice.
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post #17 of 19 Old 03-31-2013, 11:21 AM
Paradise XJ
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When you replaced the sender...did you put any thread sealer, teflon tape or RTV on the threads? Since the one wire sender grounds at the head, putting goop on the threads can give you an errant/unreliable reading.

I would personally stay away from installing a sender in the t-stat housing. Just my opinion that it's just a hack job. Fix it right IMHO.

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post #18 of 19 Old 03-31-2013, 12:36 PM Thread Starter
Motorcharge
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The one I've replaced is the one in the back of the cylinder head. I didnt put anything on it prior to putting it in.

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post #19 of 19 Old 03-31-2013, 09:52 PM
AZ Jeff
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2014 JK Wrangler 
 
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Quote:
Originally Posted by Motorcharge View Post
The one I've replaced is the one in the back of the cylinder head. I didnt put anything on it prior to putting it in.
That's correct. It's NPT, so it's self-sealing if the threads are clean.

AZ-Jeff
I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
So...I stick around and give advice.
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