2003 Subaru Impreza Owner's Manual - Page 346

Maintenance and service B Changing the coolant 1) Rubber gaskets 3. After refilling the reserve tank and the radiator, reinstall the caps and check that the rubber gaskets inside the radiator cap are in the proper position. 1) Drain plug CAUTION D Be careful not to spill engine coolant when adding it. If coolant touches the exhaust pipe, it may cause a bad smell, smoke, and/or a fire. 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 using the following procedures according to the maintenance schedule. 1. Remove the under cover. 2. Place a proper container under the drain plug and loosen the drain plug. 3. Loosen the radiator cap to drain the coolant from the radiator. Then drain the coolant from the reserve tank. Tighten the drain plug securely. - CONTINUED - 11-17