Thermostat - Subaru Legacy 2002 Service Manual

Cooling

6. Thermostat

A: REMOVAL
S176062A18
1) Lift-up the vehicle.
2) Remove under cover.
3) Drain engine coolant completely. <Ref. to
CO-13, DRAINING OF ENGINE COOLANT,
REPLACEMENT, Engine Coolant.>
4) Disconnect radiator outlet hose from thermostat
cover.
5) Remove thermostat cover and gasket, and pull
out the thermostat.
B: INSTALLATION
1) Install the thermostat in the water pump, and
install the thermostat cover together with a gasket.
CAUTION:
¼ When reinstalling the thermostat, use a new
gasket.
THERMOSTAT
S176062
B2M2920
B2M2929
G2M0214
S176062A11
¼ The thermostat must be installed with the
jiggle pin (A) facing to front side.
¼ At this time, set the jiggle pin of thermostat
for front side.
Tightening torque:
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
2) Fill coolant. <Ref. to CO-13, FILLING OF
ENGINE COOLANT, REPLACEMENT, Engine
Coolant.>
C: INSPECTION
Replace the thermostat if the valve does not close
completely at an ambient temperature or if the fol-
lowing test shows unsatisfactory results.
Immerse the thermostat and a thermometer in
water. Raise water temperature gradually, and
measure the temperature and valve lift when the
valve begins to open and when the valve is fully
open. During the test, agitate the water for even
temperature distribution. The measurement should
be within the specifications.
Starts to open:
76 — 80°C (169 — 176°F)
Fully opens:
91°C (196°F)
(A) Thermometer
(B) Thermostat
CO-20
S2M0026B
S176062A10
H2M2357A