[davids2toys]

Interesting thought...since the rad only holds 2 gallons, I am assuming would you do this with the car running if you are calling for 3 or 4 gallons to be drained. Yes but the thermostat would be closed so that doesn't make sense either because nothing would be circulating?
I could see doing this with 2 gallons out and 2 gallons in, simultaneously with car off. This way I would think you would be achieving what you are talking about here, Seems like an easy process once a year to stay ahead of it!
Your thoughts?