cant find cooling issue

I need some help. Goin down the highway my jeep creeps up to 220-225. Ive tried a thermostat, water pump, flushed cooling system and nuthin changed. So i went to the local radiator shop and got a new radiator. It was aluminium but what i thought was wierd was it was a single core. Know my jeep creeps 220f doing any speed. Help please.

Most run at 210 on the gage. Verify your gage (they are not that good). What year? Set up a variable resistor to test the gage.

Check out this thread for Wim's test method. http://www.naxja.org/forum/showthread.php?t=987736
Set up a 100 ohm resister and see if your gage reads 220 (check for your year).

Year, how equipped, what mods?

Single core radiators are OEM (except maybe for the tow package), 2- and 3-core are upgrades.

OEM stuff is fine for most daily driver applications. You really gotta know if what you're seeing on the gauge is accurate; don't assume that it is. If it's not, you may be chasing your tail.

A quick way to verify your coolant temperature is to locate an infrared point and shoot non-contact thermometer (they're everywhere now and can be purchased very inexpensively) and point it directly at the thermostat housing. Compare to what your gauge reads.