[TR] heli coiling aluminum cylinder head.

[Dave Massey]

 Sorry, sent too soon.

Yes, that is overkill. Jjust make a hole that is sized just larger than the
tap.  I have a block that I have used for years  with a hole sized to the
following taps: 4-40, 6-32, 8-32, 10-32.  I just recently make a similar block
using 1X1 square steel tubing for the helicoil job I just did.

BTW, using these blocks sure reduces tap breakage.







Dave Massey






-----Original Message-----
From: Sujit Roy <triumphstag at gmail.com>Should I make another 1 inch block with
a hole, tap that first, and thenbutt the 1 inch block up against the cylinder
head and then tap the threadsin the head through the 1 inch block block? Is
this part over kill?Sujit--