Subaru SVX 1992 Manual page 49

1-5 [05A2]
PERIODIC MAINTENANCE SERVICES
2. RELATIONSHIP OF SUBARU COOLANT CON-
CENTRATION AND FREEZING TEMPERATURE
The concentration and safe operating temperature of
the SUBARU coolant is shown in the following diagram .
Measuring the temperature and specific gravity of the
coolant will provide this information .
Safe operating temperature
1 .100
1 .090 -
Concentration of
coolant
e
1 .080
0
1 .070-
C
50%
N
1 .060-
(1 .054)
'~q
E 1 .050-
40%
Freezing ree.1 9
1 .040-
t
arn
er"peratum
30%
1 .030-
1 .020-
20%
010 1
~
.
,~ `
10%
1 .000
-40 -30 -20-10 0 10 20 30
40
50
(-4014-22)(-41114) (32) (50) (68)(88)(104)(122)
Coolanktemperature 'C ('F)
B1-063
Fig. 28
[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) .
3. PROCEDURE TO ADJUST THE CONCENTRA-
TION OF THE COOLANT
To adjust the concentration of the coolant, replace the
all amount of coolant with an undiluted solution of
SUBARU genuine coolant (concentration 50) .
B: INSPECTION
1) Check the radiator reserve tank and hoses for dam-
age or clogging .
2) Check the hose connections for leakage .
3) Check the valve, spring and packing in the cap for
damage .
4) Check rubber seal on cap for tears, cracks or deteri-
oration after cleaning it .
Install the cap on a tester and if cap does not hold or
does not release the specified pressure, replace cap.
Cap relief pressure :
88 We (0 .9 kg/cm', 13 psi)
B1 -065
Fig. 29
5) Check the radiator for leakage .
Inspect radiator for leakage using a cap tester and
applying a pressure of 157 kPa (1 .6 kg/cm', 23 psi).
If a leakage is detected, repair or replace the radiator .
1-1g . 30
6) If the coolant temperature exceeds 76.0 to 80.0°C
(169 to 176°F) while radiator is not so hot, check ther-
mostat .
7) If thermostat does not open at 76 .0 to 80.0°C (169 to
170°F), replace it with a new one .
14