Winterize Cooling System

IMPORTANT: Draining cooling system WILL NOT protect against freezing if antifreeze is weak, since system does not get drain completely.

1. Prior to cold weather, be sure that cooling system contains 50 to 67 percent antifreeze. (See Testing Coolant Freeze Point in Fuels, Lubricants, and Coolant section.)

2. After adding antifreeze, run engine until it reaches operating temperature. This mixes solution uniformly and circulates it through the entire system.