REFLECTOR: Piston

[gstull at tampabay.rr.com]

As an A&P, I've changed many cylinders with new pistons. Many times just 1 cylinder and piston combination was replaced. I'm sure there were differences in the weight between the old and new pistons. It was never a problem. These engines turn at such low RPM that I can't imagine the slight difference ever being a problem. At least in my experience it never was, since it is never adressed when you change a cylinder. Many times serious problems are introduced by trying to fix a problem the doesn't exist. The old saying "if it ain't broke, don't fix it" applies. As I said I've never heard of this being a problem working on light aircraft for over 30 years now. I'm sure if you removed the old pistons and weighed them you would find different weights between all of them. Just a thought. ---- John Dibble <aminetech at bluefrog.com> wrote: 
> I'm replacing a piston.  The new one is 35 grams lighter than the old
> one.  I need to have the weight the same as the opposing piston.  I
> could machine the opposing one or replace it with a lighter one, but I'd
> prefer if I didn't have to.  Can I add weight inside the wrist pin of
> the lighter one?
> 
> John
> 
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