Roger,

Several years back there were a number of lengthy posts about how to do
the JB Weld repair on heads and follow ups from some who had done it
after several years of use.  This technique was very successful for them.

Attached to your email is a zip file with a number of those posts which
I saved thinking I might do the job some day.  But I didn't.

Sam

--
Sam Walters

Baltimore, MD