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Ecklers has a product called "40 below radiator additive" which after adding 64 oz's is supposed to lower the water/coolent temperture 40 degrees has anyone used this product? If so does it work in reducing high temps?
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Re: 40 below radiator additive
I didn't notice much difference when using it. Certainly not 40 degrees. I think lowering the mix of antifreeze did more than anything. If you're overheating, this won't fix it. -
Re: 40 below radiator additive
You're saying adding more distilled water and less antifreeze helped lower your temps?Comment
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Re: 40 below radiator additive
Yes, the directions on the 40 below have you reduce the mix from 50/50 to about 75/25 water vs. antifreeze.Comment
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Re: 40 below radiator additive
I am probably running now 75% antifreeze and 25% waterComment
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Re: 40 below radiator additive
The "Snake Oil" salesmen still exist I seeDick WhittingtonComment
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Re: 40 below radiator additive
Plain water has more heat rejection capability than antifreeze. However, the antifreeze has important anticorrosion chemicals and also raises the boiling point. Some antifreeze manufactureres give directions on the package for a 30%/70% antifreeze/water mix. This would imply that at a 30% concentration, the corrosion inhibitors would be strong enough to do the job. This mix will provide a bit more heat rejection that the traditional 50/50 mix, but if you have a problem in your system, it likely won't cure it.
The two most common causes of overheating reported in these old Vettes is (1) a worn out, stopped up radiator and (2) an improper ignition timing map. Missing radiator seals and malfunctioning fan clutches also are frequently reported.
Many folks knock themselves out trying to find some cure besides replacing the radiator, but in many cases this is the only cure that works.Comment
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