Knurling a piston ???????

I just took my 300 block in to be tanked and bored. The guy at the machine
shop says that the block isnt worn enough to need boring. Just a hone and
piston knurling should be good enough. I've seen knurled valve guides, but
a knurled piston ?OK, thats a new one on me. Is this a good thing or should
I insist on reboring and not play with pistons with over 100,000 miles on
them ?? Thoughts ?? Thanks for your time

John

"John M. Wright" > wrote in message
...
>I just took my 300 block in to be tanked and bored. The guy at the machine
> shop says that the block isnt worn enough to need boring. Just a hone and
> piston knurling should be good enough. I've seen knurled valve guides,
> but
> a knurled piston ?OK, thats a new one on me. Is this a good thing or
> should
> I insist on reboring and not play with pistons with over 100,000 miles on
> them ?? Thoughts ?? Thanks for your time
>
> John
>
>

Google reveals all you need to know

toy

OLD time way to resize the piston so it fits better. I would just bore
it and use new pistons, rings.
Much better and will last much longer than knurling.

--
Steve Williams
Near Cooperstown NY


"John M. Wright" > wrote in message
...
> I just took my 300 block in to be tanked and bored. The guy at the
machine
> shop says that the block isnt worn enough to need boring. Just a hone
and
> piston knurling should be good enough. I've seen knurled valve
guides, but
> a knurled piston ?OK, thats a new one on me. Is this a good thing or
should
> I insist on reboring and not play with pistons with over 100,000 miles
on
> them ?? Thoughts ?? Thanks for your time
>
> John
>
>
>




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Yes: you can knurl a piston.
No: it is not usually done, but sometimes it helps. However, for an
engine that is expected to have a long life, knurling the pistion is
not the best idea.
No: if it is not worn, do not rebore the block!
Yes: do hone the cylinders (you can do this yourself if you want)

On Fri, 26 Nov 2004 09:02:30 -0800, "John M. Wright"
> wrote:

>I just took my 300 block in to be tanked and bored. The guy at the machine
>shop says that the block isnt worn enough to need boring. Just a hone and
>piston knurling should be good enough. I've seen knurled valve guides, but
>a knurled piston ?OK, thats a new one on me. Is this a good thing or should
>I insist on reboring and not play with pistons with over 100,000 miles on
>them ?? Thoughts ?? Thanks for your time
>
>John
>