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'Also, Nissan can now spray a thin coat of metal on surface of motor cylinder so this is why that motor design are not the same than 25 years ago.'
Uh, no, they've been able to do that for like 40 years plus. You are sadly mistaken as well if you think that plating is superior to oldschool iron cylinder linings too. It's done to be CHEAPER and to make sure the engines fail to be more reliably junked to sell more new cars. It's harder and more costly to rebuild plated cylinder engines. I junked 2 stroke bikes for that back in the '70s.
I do not know myself if these are iron liner or not but if that process you speak of is used on these Versa then it would explain much of the massive MR18DE failures, I'll be researching that one.
Last edited by amc49; 01-13-2017 at 03:03 PM.