When you rebuild you ALWAYS replace bearings all pistons and rings and check the head and block. Than once rebuilt and running find what caused in this case cylinder 3 to go.
To be honest just sounds like you've been skimping out on doing time consuming stuff and costly stuff and simply have not repaired the cause of the problem.
To be honest just sounds like you've been skimping out on doing time consuming stuff and costly stuff and simply have not repaired the cause of the problem.