Sorry everyone, I have been away from home for a while. I did run a half/half oil diesel blend for a very long time. Not sure if that could be it. I did check the valves prior to the compression test, and only adjusted the intake on cyl 1. I do adjust valves regularly. I suppose I could just loosen all the valves. what I would really like to see is if any air goes through the injector hole when the engine is cranked. I will also check the bubbles in the coolant. Either way, it looks like I will need to pull the head. THANKS for everyone's input, this helps a lot!