i just got done working on a 95 teg......had the exact same problem..kid kept driving it...blew the headgasket...and if he wouldve just listened...JUST CHANGE THE THERMOSTAT...i know for a fact there are 2 diff options from NAPA..offset and regular..make sure u got the right one......checked his h2o pump and found there was also blockage there and in the water pipe on back on block...just check