issues with closed system to open
 

ok i bought a new radiator for a 94 for my 88. i thought oh hell all i will need to do is add and overflow, but apparently i am wrong. I pretty much need to know everything about how to get the new system to work. If anyone who has done this has any advice i will really appreciate it.

i have yet to do this to mine but you can find a thread on it HERE

Radiator Conversion
 

You'll have to get a heater control valve from a 92' up Cherokee
https://www.cherokeeforum.com/data:i...KAoCgKAoCg/9k=
http://www.partsgeek.com/sfq33q7-jee...+Seasons+74777

You'll need a 92' up Cherokee Thermostat housing to relocate the new fan switch. The new housing has a hole for the switch. The old one does not. The switch is in the radiator.
http://lgcdn.jeep4x4center.com/media...192-T_5437.jpg
http://www.jeep4x4center.com/thermos...-53006192.html

You'll need a 2 blade Painless Wiring Coolant Temp Sensor Switch and splice that into your old wiring. The new radiator does not have the fan switch.
I put white plumbers tape around the threads to make sure it fit tight and leak proof.
http://www.jegs.com/images/mini/700/764/764-30110.jpg
http://www.jegs.com/i/Painless-Perfo...arentProductId=

And of course a good coolant overflow tank. If you don't have this you will suck air into the radiator and overheat.

Purging
 

Here's another tip. When refilling the radiator make sure the radiator is full with the cap off. Start the engine and turn on the heater. Run it until the thermostat opens. You need to burp out any air in the system or you'll have over heat problems. The radiator fluid will start to overflow as it warms up and burps, put the cap back on and make sure your coolant overflow tank is full.

ok i figured it a 1994 radiator hooks right up with everything i needed. i was having trouble with the hoses but i just bought new hose and hooked everything up strait. it works great besides its running a little cooler than i want it to so im going to get a higher thermostat because mine opens at 160.

The stock thermostat is 190*/195*. That's what it was designed to run at. If you run too cool, and if I'm not mistaken you will run rich all the time using more gas. My temp needle sits one needle width below the 210* mark on the temp guage and doesn't move unless it's under a good load like towing or going up hill.
CSF 3 row radiator and most cooling system components are all new, Grand Cherokee fan clutch, water pump, thermostat, overflow tank, heater valve, fan shroud...