[Kurt in NJ]

The first erngine I broke in easy and cartefully, not over 35 for a long time, it only lasted 3000 miles ---after fixing it with new main babbitt I "broke it in" in 2 days---on the PA turnpike, kept it to 45 till Harrisburg, then 50, would do 67 in Ohio---drove it over 60 the rest of the way, still tryinh to break it 35 years later,New iron rings "seat" quick if the cylinders are properly prepared (round, not tapered or barrel shaped), used rings take longer