Makes sense, But doesn't the pump suck the water out of the heater core on a small block V8?
You are right, the old heater core doesn't need any extra pressure.


1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.