Subaru Legacy 2003 Service Manual page 1770

4. Engine Coolant
A: REPLACEMENT
1. DRAINING LOF ENGINE COOLANT
1) Lift-up the vehicle.
2) Remove under cover.
3) Remove drain cock to drain engine coolant into
container.
NOTE:
Remove radiator cap so that engine coolant will
drain faster.
2. FILLING OF ENGINE COOLANT
1) Fill engine coolant into radiator up to filler neck
position.
Engine coolant amount for refill:
MT model;
Approx. 7.7 2 (8.1 US qt, 6.8 Imp qt)
AT model;
Approx. 7.6 2 (8.0 US qt, 6.7 Imp qt)
CAUTION:
The SUBARU Genuine Coolant containing anti-
freeze and anti-rust agents is especially made
for SUBARU engine, which has an aluminum
crankcase. Always use SUBARU Genuine Cool-
ant, since other coolant may cause corrosion.
2) Fill engine coolant into reservoir tank up to upper
level.
3) Attach radiator cap and reservoir tank cap prop-
erly.
4) Warm-up engine completely for more than five
minutes at 2,000 to 3,000 rpm.
ENGINE COOLANT
CO-00083
Full level
FULL
Low level
LOW
CO-00010
CO(H4DOSTC)-15
5) If engine coolant level drops in radiator, add en-
gine coolant to filler neck position.
6) If engine coolant level drops from upper level of
reservoir tank, add engine coolant to upper level.
7) Attach radiator cap and reservoir tank cap prop-
erly.
B: INSPECTION
1. RELATIONSHIP LOF SUBARU COOL-
ANT CONCENTRATION AND FREEZING
TEMPERATURE
The concentration and safe operating temperature
of the 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, 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).
Safe operating temperature
1.100
1.090
1.080
1.070
C
1.060
(1.054)
1.050
1.040
1.030
Freezing
temperature
1.020
1.010
1.000
–40 –30 –20 –10
(–40) (–22) (–4) (14)
Coolant temperature ˚C (˚F)
COOLING
Concentration
of coolant
60%
B
50%
A
40%
30%
20%
10%
0 10 20 30 40 50
(32) (50) (68) (86) (104) (122)
CO-00062