Headwork on a cracked head?

[Jörgen Karlsson]

Hi,

I have looked at porting the head that is going into the 80TQ -83, the
problem is that the head I have here is cracked between the valves. I know
that it should be ignored as long as it is not leaking, but I don't want to
spend the money for a pro port job on a cracked head.

I have heard the term siamesed valveseats here on the list when discussing
larger valves. I guess that it means that the intake and exhaust valve seat
is made from one pice of metall. Has anyone done this? As I see it this will
fix the crack in my head as well.

The above leads me to the valves, where do I get bigger valves, the intake
valve is probably not a problem but where do I get a bigger sodium filled
exhaust valve? What sizes are suitable?


Jörgen Karlsson