My motor appears to be losing coolant somehow, I fill the overflow and two days later it's bone dry again. I'm a tad confused as I don't have any issues normally related to a bhg like oil and water mixing, all cylinders were very close on a compression test as well. I haven't noticed any leaks or split hoses and the heater core is ok too. Could the head gasket still be going or should I be looking elsewhere for the problem?