From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: 13B smooth running issues
To: flyrotary
Date: Mon, 01 Mar 2004 09:53:31 -0500
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Posted for Mark Steitle <msteitle@mail.utexas.edu>:

John,
I went through this same scenario last weekend on my 20B after removing and 
reinstalling the radiator (mounted under the engine).  I figured I was in for 
a bit of trouble when, after refilling the system, I had about a quart of 
coolant left over.  I went through the same thing as you... running for short 
periods, then adding an ounce or two, etc.  After opening various connections 
in hopes of clearing the air block, I finally opened the right one and was 
able to get the pump circulating again.  The 20B has a hex-plug on the water 
pump housing just below the twin thermostats.  This plug goes into the 
re-circulation passages.  When I removed the plug I could see that it was dry. 
  Once I filled this cavity with coolant everything started working properly.

With that said, I don't think the 13B has an access port into this passage. 
  So, the only way to get to it is to remove the thermostat and fill it 
through 
the small hole at the bottom of the thermostat.  That's the one most people 
plug up for a/c installations.  Then put it back together and you should have 
circulation.

Mark S.

>Cooling.
>I don't think I have ANY water circulation at all. After each short 15
>second run I added maybe a pint of water. In a later longer run of about 90
>seconds I may have overheated the turbo. Perhaps it seized and this is
>what's causing my breathing problem below. Anyway, the oil came up to about
>180, but the water temp never moved off the peg, and the rad and pipes never
>even got warm after any run. I have a slight drip from the lower water pump
>fixture which goes to the rad. If this is the suction end, then I'm probably
>sucking air into the system. I am running a thermostat. Maybe I should
>remove it.