... and it's not the thermomostat either

Just got back from my third trip to the dealer in three days... they swapped out the thermostat, and that didn't fix the problem.  Two minutes away from work, the gauges went haywire again...

I've swapped out everything but the radiator at this point, and that will probably be the next thing we have to try. 

Stay tooned as I go thru yet another weekend with a broken down Jeep...