Originally Posted by
Fareastdriver
That continued with the British automobile engines until the mid fifties. The cylinder block would have stamps on it showing 010/015/020 on each bore showing what oversize piston rings to fit. The crankshaft would also have the same treatment.
Working on American engines you just dropped in the correct part number.
The American built Sikorsky S76 helicopter is known in the maintenance trade as the Shimkorsky, it's French built equivalent the Dauphin has minimal shimming and a lot less buggering about.
Lessons lost?