8n cracked block

I would be intrested in what is on the OTHER side of the crack - if you assume it goes all the way thru from where you can see it. Also you didn't say which cylinder the exhaust port was for, that might make a difference. Another thing to know is can you see the ends of the crack?

There may not be much you can do with it, especially if you cannot get at it to do anything. Being in the exhaust port would mean that it is subjected to high temperatures, so the JB weld trick would be out. May need to do just as Dell suggested, forget it is there and go on and use the motor as long as you can before serious symptoms show up that would be because of the crack.

Regards,
Larry

Heres the deal, hot exhaust gases "contaminate" porous cast iron and makes welding extreamly difficult. This is why you can seldom weld castiron exhaust manifold successfully. I wouldn't spend my money trying to fix it, Sorry..... ....Dell