MoparHonda
Well-Known Member
I have a '70 Plymouth with the 440/6.
Car has a 160 degree thermostat. Car runs around 170 degrees in town, idling at lights, cruising the neighborhood. Car goes to to about the 200 degree range in the interstate at 65-70 mph. Car drops back to the 170 degree range as soon as I get off the interstate. Why?
New radiator core (stock radiator), new thermostat, new hoses, system flushed, new coolant.
Why does this run about 30 degrees hotter at 65-70 mph on the interstate?
Car has a 160 degree thermostat. Car runs around 170 degrees in town, idling at lights, cruising the neighborhood. Car goes to to about the 200 degree range in the interstate at 65-70 mph. Car drops back to the 170 degree range as soon as I get off the interstate. Why?
New radiator core (stock radiator), new thermostat, new hoses, system flushed, new coolant.
Why does this run about 30 degrees hotter at 65-70 mph on the interstate?