Hope this is in the right area. Did a mini-me swap 2 years ago and been running great until now. Problem: radiator empty after drive to work, overflow bottle full. Pour the fluid back into the rad the next morning and drive to work, then overflow full again. Checked the compression and #3 is 100psi and #4 is 60. I suspect a head gasket based on what i'm reading in the fourms. Any suggestions?