91 wrangler 2.5 temp sensor problem - JeepForum.com
 
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post #1 of 3 Old 05-04-2021, 05:54 PM Thread Starter
herbiemin
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1991 XJ Cherokee 
 
Join Date: Jan 2015
Location: Buhl
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91 wrangler 2.5 temp sensor problem

Just rebuilt my 2.5 in my 1991 wrangler. The temp sensor in the head was cracked so I replaced it. Figured out I’d got the one for a light instead of the gauge so it wasn’t working. Ordered what was supposed to be the correct one for the gauge and it pegs the gauge within a minute of starting. I have monitored with an infrared thermometer and it’s not getting that hot. Is there something I’m missing or did I still not get the correct sensor? Thanks

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post #2 of 3 Old 05-04-2021, 06:29 PM
Kruzin
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2009 JK Wrangler 
 
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Location: Lakewood
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Could still be the wrong sensor. Could be defective out of the box. Might have air in the cooling system.

'09 JK Rubicon
'01 XJ Sport
'10 Fusion
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post #3 of 3 Old 05-04-2021, 07:47 PM Thread Starter
herbiemin
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1991 XJ Cherokee 
 
Join Date: Jan 2015
Location: Buhl
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It’s almost like it’s just the wrong ohm range or something. Looks like with engine cool and key on it’s sitting at 210 and goes up from there.
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