For Lynn and other rotary experts...  Sigh.  I jusy finished a rebuild because I started getting exhaust gasses in the coolant. ...  I assumed that I had melted a coolant jacket o ring (the Teflon ones that  RWS sells).  But now after replacing the cooling jacket o rings and other rubber stuff? I still seem to have the same problem.  Is it a warped rotor housing? Side housing?  Impossibe to guess without measurements?   I didn't bother with measurements because I dont really have the tools for the require precision.  

The symptoms originally came on fairly suddenly with no provocation (like overheating or something). ....  I just  suddenly lost most of my my coolant.

For the first time in the life of the plane I am considering throwing in the towel on the rotary engine concept, or at least my ability to manage it....