[TR] TR head rebuild

[Michael Lang]

To quote Bob Schaller from "More BS about TR's", sketch 2 on page 3 says
"Leakers; knock out and screw in pipe plug". This implies that the hole
is already threaded.

Mine still has the original aluminum plug so I haven't seen the threads
myself.

Mike

Allen Hess wrote:
>> 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