[qvalve]

Greetings, my 66 convertible heater door damper will not completely close off and allows way too much hot air inside the car on these summer days. My idea is to place a valve in-line on the heater hose coming into the car just outside the firewall. Will closing off the heater hose distrupt the circulation in the cooling system. In other words does the water have to criculate through the heater box to enable complete engine cooling? Thanks!