Thread Size, Radiator T-Stat -
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Unread 06-30-2013, 12:51 AM   #1
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1988 MJ Comanche 
Join Date: Jun 2010
Location: Phoenix, Arizona
Posts: 25
Thread Size, Radiator T-Stat

88 4.0l Commanche (MJ/XJ) has an electric t-stat in driver side end of radiator, what are the specs on thread for this??

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Unread 06-30-2013, 02:16 AM   #2
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1988 XJ Cherokee 
Join Date: Sep 2006
Location: San Jose, CA, Hammerspace
Posts: 5,344
If you're talking about the Thermal Fan Switch in the driver's side radiator tank (sounds like it - two wires, about a 1" hex?) then the threads should be M20-1.5.

If you need to know to merely plug the hole after doing some conversion or other, you can just leave that plug in place and clip the wiring off. If you're doing something else, ask away and we'll see what else we can come up with for you!
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