Posted by ptfarmer on July 10, 2018 at 08:13:17 from (70.114.32.211):
In Reply to: ring seating posted by 300winchester on July 09, 2018 at 06:04:09:
Quoting Removed, click Modern View to see
Cast iron rings are good only if you hone the bores since the cylinder walls will be harder than the rings due to all the heat cycles an engine goes through. Have it bored oversize, or replace sleeves you can use harder rings because the bores will be softer. Don not use a synthetic, or semi synthetic oil for break in, a zinc is only really need if you install a new cam, and lifters. Zinc provides a cushion between the cam lobes, and lifters. If you are the old cam, and lifters you don't really need the additive as the cam, and lifter are already broke in to each other. If you get the lifters mixed up you need either new lifters, of have the bottoms of the old ones reground, and use the zinc break in additive. When breaking in new cam/lifters don't idle the engine for the first 20 minutes, you need the oil pressure up to help keep the cam, and lifters cool while they seat together.
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