Holland, Michigan flathead. C- List

[ford38v8]

Originally Posted by KiWinUS

What’s a ring ridge and how does it affect what it is installed in?

A ring ridge is the topmost area of a cylinder bore that remains free from wear caused by the top piston ring, which becomes more pronounced as the engine wears. A seat-of-the-pants judgement of engine wear is often done by feel with one’s fingernail at the top of a cylinder. Perhaps you know of it by another name.