Lately
I have been opening boxes of parts that have been
unopened for decades. This head goes back to the late
70s. Back then we were rebuilding heads at a pretty fast
clip and if something out of the ordinary came up we just
went on to the next head and grabbed a replacement off
our growing pile.
The
note I left myself 35+ years ago said simply "may be
cracked by valve seat???" I see some traces of what I
assume to be testing die on he side of one seat. The area
also looks a bit abnormal like maybe someone tried to fix
it that didn't quite have the knowledge to do it. I don't
know for sure if we set this aside for that or that it
has 3 broken studs requiring removal. Time has been an
expensive and fleeting commodity since about a year after
we officially opened "Rallye" so the three studs by
themselves would have set this head aside.
I
have added areas on the enlarged picture of the
applicable valve seat you can access by clicking on the
link or that picture above.
A
lot of knowledge and methods have advanced in the last 35
years in aluminum welding and head repair; so I figured
before tossing this on the aluminum casting scrap pile I
would put it on the website for awhile. At least I won't
have to feel guilty if it meets that ugly
fate...
Warpage
top or bottom if any is .001-.002
Average
thickness at front of head is 4.519"
Average
thickness at rear of head is 4.525"
Average
thickness of head is 4.522
One
of the 8mm studs for the front inspection cover and two
of the cam tower studs visible in one of the pictures are
broken will have to be removed.