Bob Perkinson wrote:

Attached is a picture of the Center housing of an 87 13B that I have, as you
can see the combustion o-ring housing is broken off.  Has anyone
successfully repaired the outer wall of the combustion O-ring housing?  Can
this even be repaired?

Bob Perkinson
RV9A

Common problem for that year engine. Yes somebody has repaired them
by brazing as I recall. I personally would not consider the repair safe
for aircraft use however. These housing are interchangeably from year
to year somewhat. I would get another end housing from an 89 or latter.
It think Mazda had a quality control problem or the design did not allow
enough excess meat for minor core shifts. They fixed this problem in later years
by modifying the casting patterns I think.

Paul Lamar
 
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