So as a last ditch effort before buying a new engine I put some soapy water on the motor to see if it would blow bubbles showing me the leak. Well turns out I should have done this long ago. There was a slow leak between the cylinder head and liner in one corner. I'm sure this gets worse as the engine heats up. I'm going to get a new gasket since it has been missing since it was sent for repairs and see if that seals it up.

I'm still a bit worried about the stripped cylinder head bolt but it wasn't near the leak so hopefully I won't have to re-thread the block or anything.