You do realise that 2mm is only 5/64 of an inch, right???...Take a look at a piston outside a motor with the rings on it and measure it, then measure it when you compress the rings against the ring pins and tell us what you come up with for a measurement...And that is not even counting for heat expansion...You just might be very surprised.
You do realise that 2mm is only 5/64 of an inch, right???...Take a look at a piston outside a motor with the rings on it and measure it, then measure it when you compress the rings against the ring pins and tell us what you come up with for a measurement...And that is not even counting for heat expansion...You just might be very surprised.