The 83 diesel I bought had an aftermarket VDO oil pressure unit installed
and it started leaking quite a bit.  I decided to take it off and as I began
to loosen the bronze �t� that comes out of the engine (the VDO oil sensor
screws into the end and the stock sensor screws into it at a right angle),
the brass T broke right off, leaving a small piece of it in the engine
(screwed into place).  It seems like it is a small piece, and not even a
complete circle at that, but I�m afraid of messing up the threading in the
engine if I start digging around in there.  Any thoughts?

Dave