1999 Subaru Impreza Owner's Manual - Page 271

Maintenance and service J Changing the coolant D Never let engine coolant contact your eyes because engine coolant can be harmful to your eyes. If engine coolant gets in your eyes, immediately flush them thoroughly with clean water. For safety, when performing this work, wearing eye protection is advisable. D Never attempt to remove the radiator cap until the engine has been shut off and has cooled down completely. Since the coolant is under pressure, you may suffer serious burns by a spray of boiling hot coolant when the cap is removed. WARNING D The cooling system has been filled at the factory with a highquality, corrosion-inhibiting, year-around coolant which provides protection against freezing down to -33°F (-36°C). Use the recommended coolant only. Use of improper coolants may result in corrosion in the cooling system. It is important to maintain protection against freezing and corrosion, even if freezing temperatures are not expected. Never mix different kinds of coolant. D Do not splash the engine coolant over painted parts. The alcohol contained in the engine coolant may damage the paint surface. Change the engine coolant in the following procedures according to the maintenance schedule in the warranty and maintenance booklet. 1. Place a proper container under the drain plug and loosen the drain plug. CAUTION - CONTINUED - 10-15