1997 Jeep xj Overheating
Thread Starter
Newbie
Joined: Jan 2017
Posts: 7
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Model: Cherokee
I was kinda thinking the same. Might be gunk in the Heater Core as well. That can be easily bypassed though. I would grab the ole garden hose and give her a quick flush. Should only cost you a new thermostat gasket and/or some blue RTV, depending on how you wanna seal up the thermostat housing after the block flush.
However, you should be able to see at least 'some' gunk come out of the radiator if you do a quick flush on that to confirm gunk build up is the issue before flushing the block.
Hope this helps!
-Jon
However, you should be able to see at least 'some' gunk come out of the radiator if you do a quick flush on that to confirm gunk build up is the issue before flushing the block.
Hope this helps!
-Jon
ill give that a shot, thanks!
Thread Starter
Newbie
Joined: Jan 2017
Posts: 7
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Model: Cherokee
Tried flushing
Well I tried flushing it this weekend, even bought one of those funnel kits that attach to the radiator cap to burp out all the air when I re filled and it's still steadily creeping past 210. I might just end up taking it to a shop, I can't think of anything else to try.
CF Veteran
Joined: May 2012
Posts: 7,965
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From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
H Since then I've replaced the thermostat with a 180, changed the electric fan relay and temp sensor for the fan and it's still not working. ...., now the electric fan doesn't come on at all unless I put the ac on, even with the new relay and sensor but it overheats with or without the ac on so that can't be the only issue.
Too soon to give up, friend.
Sometimes you have to peel the onion.What's that mean? Take one problem at a time. Layer by layer, you peel back the problems. Once you have one solved the others become easier. One step at a time.
Let's test that electric fan. Run 12v from the battery straight to the fan. Make a couple jumper wire that you can run over there, disconnect the fan connector (it's over near the fan) and run the 12v straight into the fan connector. Don't worry about polarity - you won't hurt it. Try it both ways. Let's see if it spins.
If it doesn't, replace the fan and then see what happens to your temps.
