I have an 89 cherokee limited and a about 70,000 it started running hot, over 220*. I replaced the fan clutch and had the radiator rodded out and with a new therostat, Then it would not even get to 195* in the Las Vegas summer with the A/C running. So most of the prolbems with over heating on these usually are a pluged radiator. Mine was a 4 core and more than 70% where plugged. And when filling I filled through the top radiator hose till it came out of the thermostat housing then hooked the hose backup and finished filling the reserve tank and check it after it warmed up.
Good Luck