2009 Subaru Impreza Owner's Manual - Page 330

Maintenance and service 11-15 and genuine SUBARU cooling system conditioner whenever the coolant is replaced. Change the engine coolant and add genuine SUBARU cooling system conditioner using the following procedures according to the maintenance schedule. 1. Remove the under cover. tabs) on the coolant tank on top of the engine. 4. Install the under cover. Turbo models 1) Fill up to this level Non-turbo models 1) Fill up to this level 2. Place a proper container under drain plug and loosen the drain plug. 3. Loosen the radiator cap to drain coolant from the radiator. Then drain coolant from the reserve tank. Tighten drain plug securely. the the the the 5. Slowly pour the coolant and fill up to just below the filler neck, allowing enough room to add genuine SUBARU cooling system conditioner in the radiator. Add genuine SUBARU cooling system conditioner until the coolant level reaches the filler neck. Do not pour the coolant too quickly, as this may lead to insufficient air bleeding and trapped air in the system. NOTE (Turbo model only) The cap (without tabs) on top of the radiator does not need to be removed. To add coolant, remove the cap (with - CONTINUED -