Cooling System Inspection - Subaru Forester 2003 Service Manual

PERIODIC MAINTENANCE SERVICES
11.Cooling System
A: INSPECTION
1) Check the radiator for leakage, filling it with cool-
ant and attach the radiator cap tester to filler neck.
Then apply a pressure of 157 kPa (1.6 kg/cm
psi) and check the following points:
• Each portion of radiator for leakage
• Hose joints and other connections for leakage
NOTE:
• When attaching or detaching tester and when
operating tester, use special care not to deform ra-
diator filler neck.
NON-TURBO MODEL
TURBO MODEL
• When performing this check, be sure to keep the
engine stationary and fill the radiator with coolant.
• Wipe off check points before applying pressure.
• Use care not to spill coolant when detaching the
tester from radiator.
2) Check the radiator cap valve open pressure us-
ing radiator cap tester.
NOTE:
Rust or dirt on the cap may prevent the valve from
functioning normally: be sure to clean the cap be-
fore testing.
Raise the pressure until the needle of gauge stops
and see if the pressure can be retained for 5 to 6
seconds. The radiator cap is normal if a pressure
above the service limit value has been maintained
for this period.
COOLING SYSTEM
Radiator cap valve open pressure
Standard value:
Service limit:
2
, 23
CO-00042
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 sys-
tem. <Ref. to CO(SOHC)-20, Water Pump.>, <Ref.
to CO(SOHC)-25, Thermostat.>, <Ref. to CO(SO-
CO-00043
HC)-27, Radiator.>, <Ref. to CO(SOHC)-33, Radi-
ator Cap.>
4) Check the electric fan operates using Subaru
Select Monitor, when the coolant temperature ex-
ceeds 95°C (203°F). If not operate, check the elec-
tric fan system. <Ref. to CO(SOHC)-11, Radiator
Fan System.>
PM-18
93 — 123 kPa (0.95 — 1.25 kg/cm
psi)
2
83 kPa (0.85 kg/cm , 12 psi)
(A)
(A) Deformation
(B) Deformation, damage, rust
2
, 14 — 18
PM-00023
(A)
(B)
PM-00089