No, the truck cranks, idles and runs as smooth as can be. I bought a head gasket test kit to check for carbons in the coolant and everything in good on that end. I havent yet fooled with the timing yet... I did just take the thermostat back out and all the hoses back off do do some more flushing. Water flushes right through the radiator with ease and when I had water to the top of the block (truck not running) where the thermostat was, water flows right through and comes out the water pump how ever and found that when you open the petcock drain on the drive side engine block you get no water @ all. I have taken the whole plug out and still get no water out that drain? I do see a freeze plug not far from that location but I dont know if I should remove it or not. Do you think this has anything to do with the problem?