In article , wrote:

The machinists who supplied me in several different companies all said
that the only problems they'd seen along that line were from some
idiot running out of brains, crossthreading the plug, and continuing
to tighten it until he also ran out of brawn. The plugs'd freeze in
there sideways.

Even in iron heads, it's always been my practice to thread the plug in at
least a couple turns with only finger pressure, before a wrench ever touches
it. If you've crossthreaded one, you find out pretty quickly that way.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.

On Thu, 19 Jul 2007 11:53:00 GMT, (Doug
Miller) wrote:

The machinists who supplied me in several different companies all said
that the only problems they'd seen along that line were from some
idiot running out of brains, crossthreading the plug, and continuing
to tighten it until he also ran out of brawn. The plugs'd freeze in
there sideways.

Even in iron heads, it's always been my practice to thread the plug in at
least a couple turns with only finger pressure, before a wrench ever touches
it. If you've crossthreaded one, you find out pretty quickly that way.
=============
This is also a good argument for using antisieze, esp. if the
heads are aluminum. Just a dab on the threads is all you need.
As there is considerable metal content [lead/copper/nickle
depending on the brand/type] if you get any on the nose you will
short out the spark.
for some examples see
http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3
http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3
http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3
http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3
Your local mill supply and bigger/better hardware stores should
stock
Unka' George [George McDuffee]
============
Merchants have no country.
The mere spot they stand on
does not constitute so strong an attachment
as that from which they draw their gains.

Thomas Jefferson (1743-1826),
U.S. president. Letter, 17 March 1814.