Continental Aircraft Engine FAQ

I need a ring set for my 520 engine

Sorry, not enough information. Since Continental has about half a dozen pistons styles that were made for the IO520 (and 470) series engines, we need to know the piston part number you are using. Next, we need to know what cylinder surface you have, steel, chrome, chrome hybrid, etc. since some of the chrome hybrids have their own ring recommendations.

The piston part number is not the casting number you find on the inside of the piston. We can translate the casting number to a piston part number (however, some pistons with identical casting numbers had several different piston ring groove widths!).

The bottom line is that to determine what is the correct part for your engine repair takes an expert and research to do it right. There are many different ring sets for 520 (and 470) engines.