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Replacement Of Coolant

WARNING: The radiator is of the pressurized type. Do not attempt to open the radiator cap immediately after the engine has been stopped.
  1. Lift-up the vehicle.
  2. Remove the under cover.
  3. Place a container under drain pipe.
  4. Remove the drain cock to drain engine coolant into container.
    Fig 1: Removing Drain Cock
    G03827571Courtesy of SUBARU OF AMERICA, INC.
  5. For quick draining, open the radiator cap.
    NOTE:
    • For turbo model, be sure to open the radiator cap on the filler tank side.
    • Be careful not to spill coolant on the floor.
  6. Drain the coolant from reservoir tank.
  7. Tighten the radiator drain cock securely after draining coolant.
  8. Pour cooling system conditioner through the filler neck.

    Cooling system protective agent: 

    Cooling system conditioner (Part No. S0A635071) 

  9. Slowly pour the coolant into radiator. Pour the coolant up to air bleeder hole, and then install the cap. (Turbo model)
  10. Pour the coolant from radiator filler port to neck of filler. Then, pour the coolant into reservoir tank up to "FULL" level.

    Recommended engine coolant: 

    < Ref. to ,  COOLANT  , Recommended Materials.> 

    Coolant capacity (fill up to "FULL" level): 

    AT model 

    2.5 L model (without ATF cooler (with warmer)) 

    Approx. 6.3 lambda (6.7 US qt, 5.5 Imp qt) 2.5 L model (with ATF cooler (with warmer)) 

    Approx. 6.7 lambda (7.1 US qt, 5.9 Imp qt) 3.0 L model (without ATF cooler (with warmer)) 

    Approx. 7.2 lambda (7.6 US qt, 6.3 Imp qt) 3.0 L model (with ATF cooler (with warmer)) 

    Approx. 7.7 lambda (8.1 US qt, 6.8 Imp qt) 

    MT model 

    2.5 L model 

    Approx. 6.4 0 (6.8 US qt, 5.6 Imp qt 

    NOTE: The SUBARU Genuine Coolant containing antifreeze and anti-rust agents is especially made for SUBARU engine, which has an aluminum crank-case. Always use SUBARU Genuine Coolant, since other coolant may cause corrosion.
  11. Securely install the radiator cap.
  12. Run the engine for more than five minutes at 2,000 to 3,000 rpm. (Run engine until radiator becomes hot in order to purge air trapped in cooling system.)
  13. Stop the engine and wait until coolant temperature lowers. Then open the radiator cap to check coolant level and add coolant up to radiator filler neck. Next, add coolant into reservoir tank up to "FULL" level.
  14. After adding coolant, securely install the radiator and reservoir tank caps.
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