![]() ![]() So while the coolant isn't boiling and it probably doesn't get steam pockets, it's not going to reject the heat as efficiently in the radiator, particularly an ancient radiator, and temperatures are only going to go up because the cooling system won't be able to stabilize. Evans Coolant is not a solution or a fix for cars that run hot and will likely make it run even hotter because it is inferior to water as a thermal transfer medium. Your radiator and/or cooling passages are probably partially blocked with rust and crud. So it's possible to remove most of the water from Evans by simply heating it to 220 to 270 for 15 or 20 minutes or so. Then heated it to 270 and waited about 5 more minutes until the activity was almost gone. I heated it first to 230 until the sizzling from the bottom slowed to almost stopping, about 10 minutes. So now I know what pure Evans looks like when you heat it, and I returned the solution with 3% water (formerly 8% water) into the original pot. But there was NONE of the fizzling/boiling activity I saw in the other experiment. Just to see what pure Evans looked like in the same situation, I put a quart of new (pure) Evans in a sauce pan.around 200 there was a small amount of what looked like steam but nothing like before, I figure it was just propylene glycol vapor. After 5 minutes I let it cool and tested it.it had gone from 8% water to 3%. Around 180 to 200 degrees a lot of steam started to come out, by 220 to 230 degrees there was a great deal of visible activity at the bottom of the pot, sort of like boiling water, but smaller bubbles and much less vigorous, more of what I would expect to see if the water in the solution were boiling out of the Evan's. I heated it up on a portable electric hot plate that I took outdoors (Evans is flammable and I didn't want a fire, or to breath the vapors, outdoors would be safer for both reasons). Then I took the half gallon that was 8% water (see above post) and put it into a soup pot. The car was idling, my car usually boils over if I let it idle for 15 minutes because there is no forward motion of the vehicle, but I had no way to measure all the temperatures when the car was moving. Measured the radiator in the middle of the front of it, and crankcase right at the serial number. I measured the head in 4 places: front end, mid front (between 4th and 5th valve cages), mid rear (between 8th and 9th valve cages) and rear end. I used an infrared thermometer to measure the temperatures on the top of the head, the radiator, and the crankcase. Here are my results of changing from water/alcohol to Evans. I converted my 1917 Buick E-49 last week and wonder what others have found. I want to start a topic about the Evan's coolant because I didn't find one in any of the other forums.
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