TDO
Senior Member
I've been having trouble with my model A foaming , I have a flying quail on it with a temp. probe. I could see little bubbles coming out around the temp probe. I added an over- flo tank to catch the anti freeze. I wasn't sure if it was the anti-freeze foaming or compression leaking into the water jacket, I draind it all out and flushed it out with water for a long time ,to be sure it was cleaned out good. I then filled it with water and ran it pretty hard for about 20 miles even in these hills of WEST VIRGINIA, and no foaming and no water spewed into the over-flo tank. That tells me it was the type of anti-freeze. I was using Prestone with a water wetter additive. I'd like to know what kind of anti-freeze ya all are using and not having any trouble with foaming.