1 - Do the thermostat. I'm sure that it's your problem. Even if it wasn't at the beginning, overheating the engine probably damaged it.
2 - Being a Wankel engine, you're not going to get coolant in the oil or vice versa. At least that's my limited understanding of them, because there's no cylinder head, and no cylinder head gasket to leak. The only way it would mix the two things is if there was an oil cooler running through the radiator that was leaking (there's no oil cooler).
Wednesday, August 23rd, 2017 AT 7:39 PM