Yep, on the 6.5l I just swapped in. However, I'm not 100% sure it's a head gasket, because it stops after a few minutes and the upper rad hose never gets hard like I think it should. Maybe I'll pull the coolant crossover sometime soon and see if I get bubbles out of either head....if so, I'm definitely finding a shop to do the work in [img]tongue.gif[/img]