If it has a manifold heat control valve (not sure if that was still there in '68) it could be stuck closed. That would also have about the same amount of an effect on the temperature as you describe. The valve is suppose to be serviced regularly, but almost never is. Paul In a message dated 6/15/2004 2:55:52 AM Eastern Daylight Time, Jkelly808 writes: > My 120,000-mile '68 LeBaron has recently been running warmer than usual. Not >overheating, but the needle on the temp gauge, which until recently always >rested comfortably between the "C" and the first notch of the gauge, unless I >was climbing the Tejon Pass at 70, is now moving to the middle of the gauge >when I'm sitting in traffic only briefly or if I climb a hill. It isn't >overheating to the point of steam billowing out and the needle all the way to >the "H", but it's definitely running warm. And when that happens I'm getting >coolant running out of the overflow tube. > All coolant components are new within the past year -- water pump, hoses, >thermostat, radiator. > So, I'm just looking at a cheap easy fix like a thermostat, > right? Right? > Jim Kelly > Honolulu