[TR] TR head rebuild

[Allen Hess]

> 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