Thanks for the info Frank... I may end up with a set of 0.030" over pistons
on the shelf. :)
Kurtis Jones
Russellville, Arkansas
1963 TR4 - CT19389L
1959 AH Bugeye - AN5L23250
www.geocities.com/tr4_1963
> I average a block a year to the machine shop.
> I ask for a cleaning, check everything, and a hone.
> On my latest block machine work, I was informed that the bores were
> perfect. But after the cleaning and honing, the bores had pits along them
> from sitting in a damp garage or maybe outside for years.
> No choice but to bore it out. You have to get to clean smooth cylinder
> walls.
> Last year's block had a score in one wall. same thing, bore it out.
> So now I have a set of stock piston rings on the shelf since the last 2
> blocks needed to be bored out. Maybe the next engine will come up stock
> after the machinist checks it out.
> Scores in cylinder walls can happen from anything.
> I had a wrist pin sneak out a little and that made a real mess of the
> cylinder on one engine. Another had a deep scratch probably from something
> that got sucked in the intake like a rock or metal bit.
> It only has to make one revolution with something stuck in the rings to
> mess up a bore.
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