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Dana, I think that dowel is there to prevent oil from going to oil
injection area and spilling back. I recommend NOT putting it in.
During my last re-build I blew into that hole while there was oil in it.
Sure enough the oil squirted back at me from a little hole in the injection
drive area. I think that is why Tracy recommends plugging the hole.
However, I also noted that when the cover is on, that little spray of oil
will be landing right on the oil pump sprocket/chain. I believe it is meant
to do that to keep the chain lubricated.
So I installed mine without the dowel and have no problems with oil
pressure.
Dave Leonard
In reading Tracy's book on rotary rebuild he mentions dropping a
3/16" dowel
into the front cover oil passage leading to the pump drive after removing
the oil injection pump drive. I talked with Bruce who stated this is not
nessessary. Last I talked with Tracy this morning, he was ankle deep in
coolant so I'm not bothering him anymore today:-). Question, what is the
reasoning behind this dowel and is it required?
Dana Overall
Richmond, KY i39
RV-7 slider, Imron black, "Black Magic"
Finish kit
13B Rotary. Hangar flying my Dynon.
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