Subaru 2009 IMPREZA Service Manual page 1198

COOLING
5. Thermostat
A: REMOVAL
1) Set the vehicle on a lift.
2) Lift up the vehicle.
3) Remove the under cover.
4) Drain the engine
CO(H4DOTC)-14, DRAINING OF ENGINE COOL-
ANT, REPLACEMENT, Engine Coolant.>
5) Disconnect the radiator outlet hose from thermo-
stat cover.
6) Remove the thermostat cover, and then remove
the gasket and thermostat.
(A) Thermostat cover
(B) Gasket
(C) Thermostat
Thermostat
coolant. <Ref. to
CO-02448
(C)
(B)
(A)
CO-02336
CO(H4DOTC)-18
B: INSTALLATION
1) Install a gasket to thermostat.
NOTE:
Use a new gasket.
2) Install the thermostat and thermostat cover.
NOTE:
Install the parts with the jiggle pin facing upward.
Tightening torque:
12 N·m (1.2 kgf-m, 8.9 ft-lb)
T
(A) Thermostat cover
(B) Gasket
(C) Thermostat
(D) Jiggle pin
3) Connect the radiator outlet hose to thermostat
cover.
4) Install the under cover.
5) Lower the vehicle.
6) Fill engine coolant. <Ref. to CO(H4DOTC)-14,
FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
(D)
(C)
(B)
(A)
CO-02337