I've got the air intake off, i changed the fuel out, I even took the inje3ctors out and hooked them back up the the fuel lines and cranked it over. Injectors all had good spray patterns. I took it to an ag shop and they said the head gasket was bad, I doubted that because I had already pulled the injectors and put air in the cyl's and it didn't come out anywhere it shouldn't have. Since i had nowhere to go I pulled the head off (which was simple)to find out nothing was wrong with the gasket, head or block. I also pulled the plate off the front of the motor and checked the injection pump marks- ok. I have no idea where to check next cam/crank marks? It just seems so damn funny thatthis thing has ran like a clock since it was new and I'm **** about servicing it and now this happens. 1034 hrs at this point so i don't understand whats happened. This thiong should have ran alot longer than this without problems like this. Anybody have any ideas?