Allen,
On my head the plug is tapped, looks like a 3/4 pipe thread but it may be
straight, I have not tried to replace it yet. I had a bad head and decided
to try to drive it out but only succeeded in dropping it into the head.
I should think that a machine shop could easily remove this and you could
then install a pipe plug or straight-thread plug as others have suggested.
Try McMasters-Carr for a 3/4 hex-drive plug similar to the one used for the
oil gallery on the block, I bought it from Mc-C, they called it a 3/4" dia.
set screw!
Bill B
'58 TR-3A TS/30766 L
'59 TR-3A TS/64974 LO
"A Triumph is man's best friend, it always comes when it is called...of
course, some times it is difficult to make it go"
-----Original Message-----
From: triumphs-bounces@autox.team.net
[mailto:triumphs-bounces@autox.team.net] On Behalf Of Allen Hess
Sent: Friday, December 05, 2008 12:20 PM
To: triumphs@autox.team.net
Subject: Re: [TR] TR head rebuild
> a very tiny leak around the edge of the aluminum plug that is located
> under the valve cover in the center of the engine
> I believe the racers remove the original plug (which is cast in
> place), and then tap the hole for a pipe plug
I have a pipe plug in my TR4. It was done a very long time ago, but I almost
think that it is already tapped, in spite of the fact that it looks
otherwise. Don't remember why or how I got the aluminum plug out.
Allen
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