I don't think you have anything to worry about.
Almost every TR3-4 head I have ever seen has the same crack, including my
current head. In Kas Kastner's latest book there are several pictures of a
TR head and it has the very same crack, without any comments relating to the
crack. My head is in a machine shop right now for a "check up" because of a
blown head gasket, and the machinist said that "they all have that crack!"
I can't comment on why one of your heads is "repaired" and one is not!
As always of course, YMMV!!
[mailto:firstname.lastname@example.org]On Behalf Of Bob Nogueira
Sent: Tuesday, October 28, 2003 11:27 PM
Subject: TR-4 Cly Head crack
I pulled my TR4 head and pulled out my spare head. Examining them I find
that both have a crack between the #2 and #3 water jacket passages. The
crack runs from one passage to the other passage and does not go anywhere
near the combustion chambers. Examining where the crack is located it
appears that there is nothing on the back side of the crack except the water
way. From everything I can see it would appear this would have no effect on
the use of head.
Now here is the question, one of the heads has this crack brazed up while
the other does not. Is this something that should be attended to before I
have a valve job done?
Again thanks for any advise.