There is some valve float:

 

What part is the float?

 

The valve marks on the piston is the float.

 

You mean that shiny circle.

 

Well Im definatly getting springs. If I cant get them ordered in time so he can put them on with everything else early next week will my truck be ok. My trucks pretty crazy lots of power and I dont want it to break. Im going to be babying it because its a brand new motor but once in a while I will hit it hard. those marks on the piston are not the circle but the 5 indents on each piston?

 

The valve mark @ 3' o clock on the outer rim of the piston top is from valve contact (ie valve float). Valve contact with the pistons is bad bad.

 

Is that that sliver half circle thing. Sloverado those are some great #'s. Do you think I can make the 700 club on #2 only. What do you turn on #2.

 

When you float valves and contact pistons enough to make a marks usually the piston cracks around the wrist pin area. I've seen it a lot on blown and turboed gassers with forged pistons. Could stock cummins pistons be strong enough to take a valve beating? Just a thought.

 

Mine (pistons) seem to be doing ok for now. I am worried about the valve cracking and falling off into the cylinder or a valve seat falling.

 

Im so ordering springs.

 

Tim, thanks
Pourin, thanks for the pics
And anybody else that explained valve float

BlackBeast, arent you glad I brought up this whole sping and valve float topic. Mighta saved you some $$ in the long run.

 

Yes I am very glad and greatfull. Thank you wap.

 

where are you getting springs from so quick?

 

Well when I called this one dealer in last week they shipped me out a cam and studs fast. So I figured tuesday after the holiday I would have them overnight me some springs. They have those in stock too.

 

I was just playin around but I think I helped myself just as much, good luck with your 700hp #2 run.