Okay, I have read EVERY post regarding this issue and have done EVERYTHING suggested! My radiator had a crack in it, so I replaced it, BUT of course it kept overheating, therefore, I replaced the thermostat, and have tried all the "burping" techniques shared on the forum including drilling holes in the thermostat BUT I am about to pull my hair OUT! It is still overheating and there is no water coming out of my tail pipe nor in the oil! My fan is working and I'm about to have a come apart! PLEASE, PLEASE, help me! Also, I was told by a mechanic that there was a "bleed valve" that I could use to purge the air out of the system; However, I cannot find it! Oh it's a 2001 Jeep Grand Cherokee 4.0L inline 6! HELP!