My question is as follow: how far below the top of the block do the piston ring ridges form? Or put another way: when the piston is at "Top Dead Center", how far is the top of the piston from the top of the block. Knowing this I can measure from the top of the piston down to the top of the upper compression ring. My situation is this: I have a block that has been sleeved and there is a small chip in one of the sleeves at the top of the cylinder. I'm trying to determine if the upper ring comes up high enough to hit the area of the chip or will the ring be below the chip area. Best regards