1993 Pontiac Sunbird Owner's Manual - Page 165

Service Appearance Care The proper coolant for your Pontiac will: Give freezingprotection down to -34°F (-37°C). Give boilingprotection up to 262°F (128°C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lightswork as they should. What to Use Use a mixture of one-half clean water (preferably distilled)and one-half antifreeze that meets "GM Specification 1825-M," which won't damage aluminum parts. You can also use a recycled coolant conformingto GM Specification 1825-M with a completecoolant flush NOTICE: and refill. If you use this mixture, you If you use an improper coolant mix, don't need to add anything else. your engine could overheat and be badly damaged. The repair cost wouldn't be covered your by the warranty. Too much water in mix can freeze and crack the engine, radiator, heater core and other parts. When to Check What to Use and Refer to the Maintenance Schedule to determine how often youshould check the fluid levelin your clutch master cylinder reservoirand for the proper fluid. SeeOwner Checks and Services and Recommended Fluids and Lubricants in the Index. How to Check If you can see fluidin thereservoir, the level is acceptable. Engine Coolant The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating, seeEngine Overheating in theIndex. . . I 164