1993 Chevrolet Camaro Owner's Manual - Page 201

I eng~ witho ru tolar . -... I A Addingonlyplainwaterto L your cooling system can be dangerous. Plain water, or some other liquid like alcohol, can boil before the proper coolant mix will. Your vehicle's coolant warning system is set for the proper coolant mix. With plain water or the wrong mix, your engine could get too hot but you wouldn't get the overheat warning. Your engine could catch fire and you or others could be burned. Use a 50/50 mix of clean water and a proper antifreeze. [f there seems to be no leak, check to see f the electric engine fan is running. If the :ngine is overheating, the fan should be -unning. If it isn't, your vehicle needs iervice. How to Add Coolant to the Coolant Recovery Tank If you haven't found a problem yet, but the coolant level isn't at or above FULL COLD, add a 50/50 mixture of clean water (preferably distilled) and a proper antifreeze at the coolant recovery tank. (See "Engine Coolant" in the Index for more information about the proper coolant mix.) I 197-