Yes, unfortunately true.  I was having those problems trying to get the coolant to circulate.  I thought I was getting a handle on it.  The system was thoroughly burped.  At 2000 RPM the coolant was level at about 140.  At 3000 it would cool to about 100.  This told me that I was just circulating a little better at the higher RPM.  After about 5 min at 4000 RPM the coolant temp was  still only 150 when coolant began to spray the canopy.  I thought for sure I had a big enough catch can.  At first I couldn’t figure out where the coolant was coming from.  Until, to my utter dismay, I discovered it was coming from the oil vent line.  L 

 

I had coolant dripping from the exhaust and spilling out around the injectors.  I was so disgusted with the whole project I didn’t even want to think about it.  The next day I pressurized the cooling system and found a very slow leak of coolant into the front rotor chamber (as evidenced by the spray of coolant into the eye as I peered into the open spark plug hole and turned the prop – highly NOT recommended).

 

I still have good compression all around, I just need to replace the water o-rings.  I am going to use the TES o-rings.  But even that won’t help if I can’t solve this damn circulation problem.  I am really at whit’s end.  There is no reason I shouldn’t be making coolant go round and round. 

 

With my work schedule re-building the engine will only set me back about …  3 months.  Will make it thought to get to the next rotary roundup.