Hi, fellow rotary enthusiasts....I have made progress in a couple of 
areas, and thought I would share this information.   I plan on using 
the 5/8" heater barb on the 13b to provide coolant to my heater core/fan 
combination. (See attached pictureof heater core).  The heater core I 
found came from Northern factory sales in Willmar, MN.  It measures 
only 7" tall x 7" wide, and has a built-in 2 speed electric fan.  
It came with electrical rocker switch, mounting brackets, two 5/8 Y 
adapters, hose clamps, instructions, etc.  One of the most compact 
units I have seen, and quality seems very good. Replacement parts, 
to include fan blade, motor, core, etc are available seperately 
should they be needed.  If I recall correctly, the unit cost was around $119.00.
     The second item I had success with was the 5/8" heater nipple 
that is a press fit into the engine, underneath the oil filter.  
Mine was missing from my engine. I tried to find a new one, with 
no success. Finally, Mazdatrix sent a used one, but when I put a 
micrometer to it, it was considerably out of round (probably 
caused during removal from the casting).

       I found at our local CarQuest auto parts store, a steel 
5/8" hose barb to a 1/2" NPT male fitting. I just put it in a
 lathe, and turned the 1/2" NPT threaded area down to 17 mm, 
or .160 inches. In the picture, you will see the longer original
 piece, as well as the new, slightly shorter nipple.  The nice 
part about the new piece is that the center hole that goes through 
the entire piece is a little smaller than the original, so with 
it's thicker walls, it won't elongate or get out of round as 
easily as the original, which was rather thin walled.  Just put 
it in the freezer, warm the engine area where it is to be inserted
 with a propane torch, and tap into place with a plastic no-blow 
hammer, or a steel hammer with a block of wood to protect the hose barbed end.
     I hope this info is of some interest and/or use to someone 
else?  Everyone has been so kind in sharing their discoveries, 
it's nice that I can finally share some of mine.
     The last item I have to report on pertains to the remote 
oil filter project I have undertaken.  A machinist friend of 
mine made some 90 degree oil filter adapters for Lycoming.  
I showed him the oil filter housing from my 13b, and he is 
designing a 90 degree adapter that will bolt right onto the 
existing plate where the oil filter housing once fit, cutting 
in O-ring grooves, then using the original oil filter base 
that came with the engine, creating a lower profile oil filter,
 by simply laying the filter down at a 90 degree angle. Instead 
of creating a totally new and complicated adapter, we are going 
to use the same filter base that was already on the engine....
just turn it 90 degrees.  I should have something to show in a week or so.
      Take care, and thanks for letting me share this info.  Paul Conner

BTW guys please set your line wrapo to 65 or so. It makes less of a mess
when it gets re quoted. Thanks.

Paul Lamar

 
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