Operation CHARM: Car repair manuals for everyone.

Technician Safety Information

WARNING:
^ Do not remove the radiator cap while the cooling system is hot Serious personal injury may result. Only remove the radiator cap from a cool engine.
^ Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the engine is hot (pressure is high), will cause the solution to boil instantaneously, With explosive force. The solution will spew out over the engine, fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at any time. Flammable antifreeze could cause a serious fire.