Keith for what its worth I have only seen
pistons that DONT have discoloration on the 2nd
ring land, unless something catastrophic has happened
Only really dabbled with relatively small
bores though
Joe :)
Skip & Joyce Higginbotham wrote:
> Keith, I have found that low RPM is richer and that colors the ring
> lands...generally exactly as you describe. When the RPM is up the mixture
> keeps the pistons cleaner.....it could be a little oil? I think that your
> assumtion is correct. The rings are sealing. Are the rings gapless?
> Skip H
>
> At 07:14 PM 5/7/01 , you wrote:
> >Curiosity has the best of me.... I was checking out the rings on the Pistons
> >out of the Cast Iron D Motor....( getting them ready to be zyglo'ed ) anyway
> >I noticed the Carbon only went down to the top of the first ring land....
> >
> >To me that ment the Rings were Sealing well as there was No Carbon marks
> >anywhere Past the top of that ring land....
> >
> >Is that a correct statement?
> >
> >Keep in mind this is one of my first Non destructive tests ( well almost
> >less a piston )
> >
> >any comments ?
> >
> >K
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