I use Evans Waterless Coolant in both my 300D's, just because I abhor corrosion. But, recently removed it in my 1985 while chasing a strange apparent overheating issue all last winter. Usually ran ~100C, creeping up at long red lights, and IR gun confirmed. Unlikely it is due to Evans since I ran at least one summer with it. Changing water pump, T-stat (again), etc. Hope not a crack in the head, and if it is unlikely would be due to Evans. My 1984 runs a stable 82 C even on the hottest days and use Evans in my 2002 T&C minivan.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans