Went through the same thing a few months ago. And yes, right up to the time it finally quit, the truck was running like a champ just blowing antifreeze out the overflow. One tip: Get an engine hoist and take the head and manifolds off as one piece. Yes, it is one heavy sucker that way but the engine hoist does all the work. <img src="/forums/images/graemlins/kewl.gif" alt="" />