2.5 YJ overheating - Page 3 - JeepForum.com

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post #31 of 33 Old 01-02-2008, 11:26 AM
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1992 YJ Wrangler 
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I just installed a 195 t-stat in mine to replace the PO's too cold t-stat.
Run it until it's hot with the radiator cap off, and "burp" the system by squeezing the upper hose. That should suck all the air out of the system.

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post #32 of 33 Old 02-24-2008, 06:25 AM Thread Starter
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2001 TJ Wrangler 
Join Date: Jul 2007
Location: Michigan
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I thought i should update this thread with some important info on t-stats for out YJ's.

If you have to replace yours, make sure it has a bleeder hole!! I purchased 2 from advanced auto, neither of them had a breather hole (the factory one does!) and neither of them would open. They were the cause of this entire thread. I went to autozone, and the first one i picked up had a breather hole in it. I popped it in, and i never had another problem with it.

Save yourself some trouble, make sure your T-stat has a breather hole on it!
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post #33 of 33 Old 12-06-2009, 07:15 PM
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1990 YJ Wrangler 
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2 things you could do....1 drill a 3/32" hole in the stat,that should get rid of any air lock in the system,or ,this is a bit extreme(depending on the climate),,you could gut the stat so its a restriction(this is a common low buck drag race trick).Just remove the valve/spring assembly,it should leave you about a 3/4 to1 inch orifice so the coolant will absorb the heat in the block/head,but it will take a little longer to get some heat...but try the 3/32 hole first ,,that should do it....Buzziegee
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