I am re-assembling my 2.0L engine after a rebuild. It has new rings and bearings. After I installed the crank, it would turn by hand smoothly and with a reasonable amount of force. When I began to install the pistons, it would not turn easily by pulling on the flywheel. I have checked the ring end gaps, and they are within spec. Is this normal for the pressure of the new rings to exert enough force on the cylinder walls as to make turning the crank by hand to be very difficult?