Hi, fellow rotary enthusiasts....My radiator is all connected, and the last
thing I need to do before engine start is the expansion tank. I purchased a
nice aluminum expansion tank that has a fitting on the bottom, and one on
the side, about 2/3rds of the way up from the bottom. It has a billet
machined radiator cap fitting on the top.I also had another female pipe
fitting welded on for my glass sight gage, which is right about in the
middle of the tank. (also on the side).
     I read a few of the recent discussions, and I agree that the plastic
recovery bottle may not be the best way to go. I am trying to go with the
"closed" system, where there is only an aluminum expansion tank, so that you
do not have to wait for the engine to cool down to suck the excess
water/antifreeze mixture back into the engine.   I understand that the
bottom of the tank should have a hose running to the top of the water pump,
and I have installed a fitting just underneath the thermostat for this.
Where would be the best place run/connect  the hose that connects to the
side of the expansion tank? The expansion tank has a radiator cap on it, and
that is the only radiator cap in the system. I will initially fill the
system by disconnecting the upper radiator hose, filling it there, and
reconnecting, then slowly "bleed" the air out of the system by adding a
little as needed each time it is run.  Might this work OK?  Thanks for any
and all suggestions and comments.  Paul Conner, 13b normally aspirated on a
plane with the engine on the wrong end also.