New engine blowby

harvenator said
Don't have to do a leak down -- with blow by and "0" compression in #8, I know where my problem is. I just won't know exactly what the cause of the problem is until I pull the head.
"moper" -- I know I didn't miss a ring because there were no parts left and this problem didn't occur until I had some miles on the engine -- maybe 150 or so. I'm inclined to believe that either the piston had a 'comeapart' or a ring broke or all the ring gaps got lined up. I'm not too keen on the last 2 because that would still give me a few #'s of compression.
I'll know more when I pull the head.

You could have at least one ring broken and still have compression. You could have all the gaps lined up and you MIGHT not even notice the difference.

This is something serious like a broken piston, but it could be

A VALVE problem. Pull the valve cover. If you spit out the intake pushrod, it won't have compression and would probably use oil--trying to pull a vacuum on the rings.