71 Charger, originally AC car, AC long gone. Still has the AC heater box and controls. I've been putting the vacuum system back together so I get air to the right place. Heater worked great but only blew through dash vents. All is working now, heat goes to the right vents. Now adding the water control valve that is controlled by the COLD/HOT lever which regulates the amount of vacuum to the valve under the hood.
I found a NOS valve, pic below. The question I have is regarding the hose sizes. The hose connectors from the water pump to the valve, then to the connection on the firewall are slightly smaller than the return side, which makes no sense. The current hoses from the water pump to the firewall and back are the same size. This means, I think, that the hose connection on the water pump pressure side is going to be larger than the connection on the valve. Shouldn't all the hose connections on the water valve be the same size?
I found a NOS valve, pic below. The question I have is regarding the hose sizes. The hose connectors from the water pump to the valve, then to the connection on the firewall are slightly smaller than the return side, which makes no sense. The current hoses from the water pump to the firewall and back are the same size. This means, I think, that the hose connection on the water pump pressure side is going to be larger than the connection on the valve. Shouldn't all the hose connections on the water valve be the same size?
