piston pin plug shaving Lycoming IO360
I am looking at an aircraft with this exact problem it is on the front two cylinders, which were replaced ~475 hours ago with genuine Lycoming cylinders. The cylinders replaced had ALSO exhibited the same problem after ~1075 hours. Those cylinders were Superior Millennium parts...
There is a theory that it may be exacerbated by excessive cooling on the front face of the front pots. I suspect it is some combination of inadequate lubrication, inadequately hardened cylinder wall and a dynamic which is forcing the plug against the cylinder wall, where it has no right to be.
It's very depressing that it has recurred on the replacement parts, where do you go from here?
Is North of barlu in the Pacific above Oz?
Last edited by neilmurg; 3rd April 2013 at 09:16.
Reason: added question