Last one I did (in a TR6 transmission case) I drilled the hole 21/64.
Worked just fine for me...
Jeff Scarbrough
Corrosion Acres, Ga.
On Sun, Nov 25, 2012 at 7:32 PM, Bob Nogueira <Bob@texmog.com> wrote:
> I'm about to install a helicoil in an aluminum block. The tap calls for
> drilling a 21/64" hole. Since it is aluminum should I drill the hole just a
> tad smaller? If so how much?
>
> Thanks Bob Nogueira
>
> (" Mr Gaskell, how much is a tad?". -- " more than a smidgen and less than a
> bit")
> ----The Patio Garage. 1963
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