Here’s a ’59 Big Twin which should be the same under the hood as your RDSL. This motor had just been rebuilt and I was carefully watching the water flow coming out of the back. It wasn’t gushing out as I expected but then again the motor wasn’t under load and wouldn’t have been generating much heat to open the thermostat much. It was cold and wet the day I filmed it and I’m sure that’s why there was so much steam.
Just noticed that was nine years ago when I had it running! Where does the time go? When it warms up a bit I should wheel it out of the garage and fire it up again to see if it still steams as much.
