Cooling System - Subaru Legacy 2004 Service Manual

PERIODIC MAINTENANCE SERVICES

10.Cooling System

A: INSPECTION
1) To check the radiator for leakage, fill it with en-
gine coolant, and attach the radiator cap tester (A)
to the filler neck, and apply pressure. Check the fol-
lowing points:
Non-turbo model:
157 kPa (1.6 kg/cm
Turbo model:
122 kPa (1.2 kg/cm
• Each portion of radiator for leakage
• Hose joints and other connections for leakage
NOTE:
• For turbo model, be sure to install the tester to fill-
er tank side.
• When attaching or detaching tester or when op-
erating tester, use special care not to deform radi-
ator filler neck.
• Non-turbo model
• Turbo model
• 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 us-
ing radiator cap tester.
Cooling System
2
, 23 psi)
2
, 18 psi)
(A)
PM-00128
(A)
PM-00184
NOTE:
Rust or dirt on the cap may prevent valve from func-
tioning 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 pres-
sure above the service limit value has been main-
tained for this period.
Radiator cap valve open pressure
Non-turbo model
Standard:
93 — 123 kPa (0.95 — 1.25 kg/cm
psi)
Service limit:
83 kPa (0.85 kg/cm
Turbo model
Filler tank side
Standard:
93 — 123 kPa (0.95 — 1.25 kg/cm
psi)
Service limit:
83 kPa (0.85 kg/cm
Radiator side
Standard:
122 — 152 kPa (1.24 — 1.55 kg/cm
22 psi)
Service limit:
112 kPa (1.14 kg/cm
(A)
(A) Check points for deformation
(B) Check points for deformation, damage, rust
PM-20
2
, 14 — 18
2
, 12 psi)
2
, 14 — 18
2
, 12 psi)
2
, 18 —
2
, 16 psi)
PM-00023
(A)
(B)
PM-00089