1993 Chevrolet Camaro Owner's Manual - Page 243

What to Use: Use a mixture of one-half clean water (preferably distilled) and one-half antifreeze that meets"GM Specification 1825M," which won't damage aluminum parts. You can also use a recycled coolant conforming to GM Specification 1825M with a complete coolant flush and refill. If you use this mixture, you don't need to add anything else. - Adding only plain water to b your coding 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 forthe 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. I I If you use an improper coolant mix, your engine could overheat and be badly damaged. The repair cost wouldn't be covered by your warranty. Too much water in 1mix can freeze and crack the engine, radiator, heater core and other parts. 239