Water in radiator rusty looking

[Eman]

Your results may vary, all I can tell you is what worked for me. Years of rust in the radiator with a SBC with iron heads and aluminum radiator. I tried every combo of additives and lubes from water pump lube to lucas additive and others in between and still had rust, always used distilled water. One year I actually read the directions on the bottle of Lucas coolant additive and it said do not use distilled water. Since then I use Lucas additive with gallon bottles of store bought drinking water. No more rust.

[rod]

FYI, the waterless coolant is basically RV anti-feeze. it will not cool unless you used a 20 lb or higher rad. cap. most rads. will not take that kind of pressure. I use that RV AF in my solar hot water system. believe me, it absorbs a lot of heat. but getting rid of the heat using the RV AF is not easy
Rod in AZ

[Darrel Goheen]

Originally Posted by rod

FYI, the waterless coolant is basically RV anti-feeze. it will not cool unless you used a 20 lb or higher rad. cap. most rads. will not take that kind of pressure. I use that RV AF in my solar hot water system. believe me, it absorbs a lot of heat. but getting rid of the heat using the RV AF is not easy
Rod in AZ

Hmmm, that's not the info I got from Evans. They say it should build very little if any pressure because it doesn't contain water.