Reply to "Piston rings glazed"

I agree with Doug. Coincidently, there's an extensive thread on engine break-in on my Engine Builders Forum right now (www.speedtalk.com). A half-dozen pro builders disagree on details but nearly ALL agree that the best way to break in a new engine is on a dyno; after warm-up, by the third pull under load to maybe 5000 rpm the power stabilizes and rings & valves are seated as well as they will ever be. Good quality moly-faced rings break in almost immediately per the above. Old-school cast iron rings are cheap, for easily satisfied poor boys with time but no money and need to be prepped as we did 50+ years ago.

Others say to break in a street engine by immediately driving it as you expect to use it in the future. All agree- do NOT let it idle AT ALL and do not use synthetic oil during break-in. Change oil & filter after 50 or so miles & inspect for debris. Engine break-in is essentially rapid, controlled wear of the new parts, and modern synthetics & additives are especially designed to prevent this!