10.Cooling System - Subaru Outback Forums

Cooling System
PERIODIC MAINTENANCE SERVICES
10.Cooling System
A: INSPECTION
1) To check the radiator for leakage, fill it with engine coolant, and attach the radiator cap tester (A)
to the filler neck, and apply pressure. Check the following points:
Non-turbo model:
157 kPa (1.6 kg/cm2, 23 psi)
Turbo model:
122 kPa (1.2 kg/cm2, 18 psi)
• Each portion of radiator for leakage
• Hose joints and other connections for leakage
NOTE:
• For turbo model, be sure to install the tester to filler tank side.
• When attaching or detaching tester or when operating tester, use special care not to deform radiator filler neck.
• Non-turbo model
(A)
NOTE:
Rust or dirt on the cap may prevent valve from functioning normally: be sure to clean the cap before
testing.
Raise the pressure until the needle of gauge stops
and see if the pressure can be retained for five to
six seconds. The radiator cap is normal if a pressure above the service limit value has been maintained for this period.
Radiator cap valve open pressure
Non-turbo model
Standard:
93 — 123 kPa (0.95 — 1.25 kg/cm2, 14 — 18
psi)
Service limit:
83 kPa (0.85 kg/cm2, 12 psi)
Turbo model
Filler tank side
Standard:
93 — 123 kPa (0.95 — 1.25 kg/cm2, 14 — 18
psi)
Service limit:
83 kPa (0.85 kg/cm2, 12 psi)
Radiator side
Standard:
122 — 152 kPa (1.24 — 1.55 kg/cm2, 18 —
22 psi)
Service limit:
112 kPa (1.14 kg/cm2, 16 psi)
PM-00128
• Turbo model
(A)
PM-00023
PM-00184
• When performing this check, be sure to keep the
engine stationary and fill radiator with coolant.
• Wipe off check points before applying pressure.
• Use care not to spill coolant when detaching
tester from radiator.
• Do not remove the radiator side cap. (Turbo
model)
2) Check the radiator cap valve open pressure using radiator cap tester.
(A)
(A)
(B)
PM-00089
(A) Check points for deformation
(B) Check points for deformation, damage, rust
PM-20
Cooling System
PERIODIC MAINTENANCE SERVICES
3) Start the engine, and then check it does not
overheat or it is cooled excessively. If it overheats
or it is cooled excessively, check the cooling system.
• 2.5 L non-turbo model
<Ref. to CO(H4SO)-14, Water Pump.> <Ref. to
CO(H4SO)-17, Thermostat.> <Ref. to CO(H4SO)19, Radiator.> <Ref. to CO(H4SO)-22, Radiator
Cap.>
• 2.5 L turbo model
<Ref. to CO(H4DOTC)-15, Water Pump.> <Ref. to
CO(H4DOTC)-17,
Thermostat.>
<Ref.
to
CO(H4DOTC)-19,
Radiator.>
<Ref.
to
CO(H4DOTC)-23, Radiator Cap.>
• 3.0 L model
<Ref. to CO(H6DO)-12, Water Pump.> <Ref. to
CO(H6DO)-13, Thermostat.> <Ref. to CO(H6DO)14, Radiator.> <Ref. to CO(H6DO)-17, Radiator
Cap.>
4) Check the radiator fan operates using Subaru
Select Monitor, when the coolant temperature exceeds 96°C (205°F). If it does not operate, check
the radiator fan system.
• 2.5 L non-turbo model
<Ref. to CO(H4SO)-8, INSPECTION, Radiator Fan
System.>
• 2.5 L turbo model
<Ref. to CO(H4DOTC)-9, INSPECTION, Radiator
Fan System.>
• 3.0 L model
<Ref. to CO(H6DO)-8, INSPECTION, Radiator Fan
System.>
PM-21
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