Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 3.7 Roadster update

This is a familiar cry from the American car forums.....

I've always run engines in sensitively. I was told by one of the Aston engineers that you end up with a less rattly and more oil tight engine. Raping the engine after 1,000 miles has never been my thing.

Different strokes.

Of course do what makes you feel most comfortable but bear in mind that engineering tolerances these days are a far cry from days gone by. You certainly don't want to push it until after the first service but after that in my experience life's too short for anything less that using re car to its full potential.

As I see it...
Iron & steel bearing surfaces ( bores, rings, crankshafts ) will work harden over a period of time. The more you allow this work hardening to build up, the better the life of the engine. I've heard of traction engine bores that need diamond tools to break the skin on the bores! OK, so 100 years may be stretching the running in a bit...
Agreed, machining standards are worlds apart from yesteryear & you can work an engine hard after 1000 miles or so & that engine will still give you 100,000 miles or more. But I still believe that a well run in engine will run better than a thrashed one. Each to his own, but I'll run mine in
Ian