Mark, I sealed that passage by welding a
plate over it. So you are right that I probably have air trapped in there. It
shouldn’t be enough to prevent circulation, but a small hole would help
to get that bit of air out of the system. I will do that. There won’t
be any significant flow through a #40 hole but it will allow the air to get
out.
One little improvement, now I just need a
few more.
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Tuesday, April 06, 2004 1:00
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Cooling Problem
Dave,
One thing that caused me a bunch of head-scratching was the bypass circuit in
the water pump housing when first filling the cooling system. It can
prevent the wp impeller from pumping coolant through the engine. That is
where I would look first. Did you weld and/or plug the hole at the bottom
of the thermostat? If so, you could have air trapped in that
cavity. If you installed a screw-in plug, try removing it and then
filling the system, then replace the plug. If you're running a thermostat,
have you removed it to fill the system?
Mark S.