Technical Cleaning a radiator.

An old mechanic said drano?

 

Something to consider once you have the rad cleaned out
is add a Gano filter into the return hose to the radiator
Restoration Supply Company Inc sells them
they make two sizes
I have one in my model A and two in my Roadster
Pull it once every year to clean
you’ll be surprised how much crap they catch


This one is from my model A after a year and maybe 500 miles
The coolant looked very clean