Ice water is only 32F, but if you add rock salt, that mixture is 0F. Dry ice and alcohol is -130F, which is getting to the melting point of ether which is -177F. That will get the vapor pressure low enough that it won't blow the solder out of the joint.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.