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Subaru Outback F4-2.5L DOHC Turbo (2006)03 · Maintenance
03 · Maintenance

Coolant: Specifications (page 2 of 3)

Make
Subaru
Model
Outback F4-
Engine
2.5L DOHC Turbo
Year
2006
Section
Fluids › Coolant
MaintenanceSpecifications · page 2 of 3
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Coolant: Testing and Inspection

INSPECTION 

RELATIONSHIP OF SUBARU COOLANT CONCENTRATION AND FREEZING TEMPERATURE 
Concentration and safe operating temperature of SUBARU coolant is shown in the diagram. Measuring the temperature and specific gravity of the
coolant will provide this information.
[Example]

If the coolant temperature is 25°C (77°F) and its specific gravity is 1.054 and the concentration is 35% (point A), the safe operating temperature is -14
°C (7°F)
 (point B), and the freezing temperature is -20°C (-4°F) (point C).

PROCEDURE TO ADJUST THE CONCENTRATION OF THE COOLANT 
To adjust the concentration of coolant according to temperature, find the proper fluid concentration in the above diagram and replace the necessary
amount of coolant with an undiluted solution of SUBARU genuine coolant (concentration 50%).
The amount of coolant that should be replaced can be determined using the diagram.
[Example]

Assume that the coolant concentration must be increased from 25% to 40%. Find point A, where the 25% line of coolant concentration intersects with
the 40% curve of the necessary coolant concentration, and read the scale on the vertical axis of the graph at height A. The quantity of coolant to be
drained is 2.1 L (2.2 US qt., 1.8 Imp. qt.). Drain 2.1 L (2.2 US qt., 1.8 Imp. qt.) of coolant from the cooling system and add 2.1 L (2.2 US qt., 1.8

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Parts & tools for this job For 2006 Subaru Outback 2.5L

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