25-04-2020, 08:41 AM
long long ago when I was just a junior bodger I had a brand new set of old stock pistons and a newly bored block , when I ran this engine it oiled the plugs in an instant . I took that engine apart many times before I gave up trying to run it with those pistons and just put them on the shelf many years latter having read a sentence in an old motor engineering book I took off the bottom oil ring and counted how many oil return holes there were and there were just five , a quick check of all my other old pistons and most of those had ten holes behind the bottom oil ring.I soon gave those pistons an extra five holes and put them back into an an engine they ran fine and all oiled plug problems went away regards to all Rob.