It's looking like I have a leaky head gasket. My Sube overheated on my way back from the mountain 2 weeks ago. It was fine, until I went to the mountain again this weekend. I thought it was the thermostat, but I replaced and flushed the coolant. It was oily and acrid smelling. This seems to point to a leaky head gasket. I called a local shop and they want $2300 to replace this and the clutch (which they recommend). Any ideas on what it should cost ? Also, does anyone know of a good shop in Portland, Oregon? Any information would be appreciated.