Yesterday our local off-road group held a mud event on one of the member's private property. When I got there I didn't get to mud my cherokee but 10 minutes before anti-freeze started blowing out of the reservoir. I replaced the thermostat and it still continued to overheat.

I have an 88 cherokee with 35's, and there are no cracks in any of the tubes. I've read about upgrading to the open cooling system but still believe I should be able to drive 100 yards without overheating on a closed system.

Any suggestions??? I've read something about replacing the radiator cap, but would that honestly have anything to do with it? I called Vatozone and they said they have the OEM or one with a breather, which would you recommend (if any?)

 

The cap could be your problem, they get warped and then let coolant blow out when they get hot. i read something on naxja about putting a clamp around the cap to keep it tight and avoid it blowing off

 

Okay gotcha, but does anybody know what could be causing this thing to over heat so quickly??

 

if theres az problem with the pressure cap on the bottle it will never hold pressure ive went thru three bottles and caps in the 15years ive had mine upgrading the system stopped all problem

 

I had nothing but problems with renix cooling system. I would just do the upgrade along with a CFS rad.
Ever since I switched it's been a nice cool ride.

 

What do I need to switch? Would a radiator off a 92 laredo work?