I think my truck has a blown head gasket, water level goes down quick, oil is disapearing, and runs a little hot. no smoke out the tail pipe yet, oil just goes down looks fine, water is rust greenish brown color, sort of a rust color. still runs fine, I do not see any white foam in the filler cap and there not any blow by. it still starts fine I have an exhaust leak so it ticks right now. I am going on a camping trip tonight so I do not have time to fix it, I am going to tighten the exhaust leak before I go. how long does it take you guys to do head gaskets? I do plan on taking the heads to a machine shop and get everything check out and get the valves reseated. what else should I do? what could I do for this weekend? truck is a 74 k5 with a 350 in it.