OK, I just got a really bad visual about that one! Back when a lot of GM cars had a fuel injection pressure test port with a 1/4" flare fitting with a Schrader valve in it, I saw a couple of Freon recycling machines ruined by somebody connecting one of the lines to the fuel system. Gasoline and refrigerant gas equipment don't gee-haw too well!

I also saw a guy use the exhaust sample tube on a 4-gas exhaust analyzer to try to check for hydrocarbons in a cooling system (checking for a leaky head gasket) and he got the probe into the coolant. Antifreeze in a 4-gas is another no-no!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!