The heater core is a radiator-like device used in heating the cabin of your 1963 or 1964 Chevy. Hot coolant from the vehicle's engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air. Fins attached to the core tubes serve to increase surface for heat transfer to air that is forced past them, by a fan, thereby heating the passenger compartment. Trust Eckler's Late Great Chevy for all your 1963-1964 Chevy restoration and performance needs.
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