Posted by jdemaris on January 25, 2008 at 09:38:51 from (67.142.130.16):
In Reply to: Piston rings again posted by 37 chief on January 25, 2008 at 09:09:06:
Cast iron rings are designed to wear faster than the cylinder walls and will seat faster and wear out sooner. That's why many older engines that had iron rings can be re-rung without boring the cylinder walls.
Hard rings like chrome will be harder than the cylinder walls and take more abuse when the walls are rusted, pitted, etc. but will take longer to seat. The "break-in" process will rely more on the cylinder-walls wearing a bit to match the rings.
If this was my machine - it would get iron rings for a "quick fix" if I was selling it, and it would get chrome rings if I was planning on keeping it and using it.
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