[Chester B. Stone, Jr.]

Wet sleeve engines, and I think my Series 60 has them, have a tendency to form steam bubbles along the surface of the sleeve. This cavitation causes pitting on the sleeve wall which can eventually destroy the engine. To overcome this problem, use antifreeze that is formulated with chemicals to collapse the bubbles. I believe this is called SCA components. Also, when changing the coolant water filter, use a filter that contains the required chemicals. There are test strips that enable you to verify the correct level of chemicals.