Okay so this was my paps truck but it became too much work for me and him and now it will be mine when i fix it (He doesnt want the truck anymore) . The Issue is that there is a loss of compression on one of the cylinders. I am going up in a few hours to work on it. I know a possibility could be a hole in the piston, cracked piston, or even the rings going. I read somewhere that if my valve is BURNT not BENT then it could cause this. Any other idea.

Much appreciated

 

Do a cylinder leakdown test. That will tell you EXACTLY where the problem is.

 

Yep, I think the parts stores will rent one to you. But you need compressed air though. Hopefully a rocker arm just jumped off.

 

Intake valve either needs replaced or relaped. Ill keep you guys updated on the progress The combustion chamber was filled and within a minute it was like this