Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 96
CO(STI)-16
Water Pump
COOLING
4) Install the belt cover No. 2 LH.
Tightening torque:
5 N·m (0.5 kgf-m, 3.7 ft-lb)
5) Install the cam sprocket LH. <Ref. to ME(STI)-
59, INSTALLATION, Cam Sprocket.>
6) Install the belt idler No. 2 (C).
Tightening torque:
39 N·m (4.0 kgf-m, 28.8 ft-lb)
7) Install the belt idler (B).
Tightening torque:
25 N·m (2.5 kgf-m, 18.4 ft-lb)
8) Install the automatic belt tension adjuster (A)
with the tension rod held by a pin. <Ref. to
ME(STI)-52, AUTOMATIC BELT TENSION AD-
JUSTER ASSEMBLY AND BELT IDLER, INSTAL-
9) Install the timing belt. <Ref. to ME(STI)-53, TIM-
ING BELT, INSTALLATION, Timing Belt.>
10) Install the timing belt cover. <Ref. to ME(STI)-
49, INSTALLATION, Timing Belt Cover.>
11) Install the crank pulley. <Ref. to ME(STI)-47,
12) Install the V-belts. <Ref. to ME(STI)-40, IN-
13) Install the radiator. <Ref. to CO(STI)-20, IN-
C: INSPECTION
1) Check the water pump bearing for smooth rota-
tion.
2) Check the water pump pulley for abnormalities.
3) Make sure the impeller is not abnormally de-
formed or damaged.
4) Inspect the clearance between impeller and
pump case.
Clearance between impeller and pump case:
Standard
0.5 — 1.5 mm (0.020 — 0.059 in)
5) After water pump installation, check pulley shaft
for engine coolant leaks or noise. If leaks or noise
are noted, replace the water pump assembly.
CO-02908
CO-02726
(A)
(B)
(C)
CO-00293
CO(STI)-17
Thermostat
COOLING
5. Thermostat
A: REMOVAL
1) Lift up the vehicle.
2) Remove the under cover. <Ref. to EI-28, RE-
3) Drain engine coolant. <Ref. to CO(STI)-13,
DRAINING OF ENGINE COOLANT, REPLACE-
4) Disconnect the radiator outlet hose from thermo-
stat cover.
5) Remove the thermostat cover, and then remove
the gasket and thermostat.
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)
3) Connect the radiator outlet hose to thermostat
cover.
4) Install the under cover. <Ref. to EI-28, INSTAL-
5) Lower the vehicle.
6) Fill engine coolant. <Ref. to CO(STI)-13, FILL-
ING OF ENGINE COOLANT, REPLACEMENT,
(A) Thermostat cover
(B) Gasket
(C) Thermostat
CO-02771
CO-02780
(B)
(A)
(C)
(A) Thermostat cover
(B) Gasket
(C) Thermostat
(D) Jiggle pin
CO-02781
(B)
(A)
(C)
(D)
CO(STI)-18
Thermostat
COOLING
C: INSPECTION
1) Check that the thermostat does not have defor-
mation, cracks or damage.
2) Check that the thermostat valve closes com-
pletely at an ambient temperature.
3) Immerse the thermostat and a thermometer in
water. Raise water temperature gradually, and
check the temperature and valve lift when the valve
begins to open and when the valve is fully opened.
Replace the thermostat if faulty.
NOTE:
• During the test, agitate the water for even tem-
perature distribution.
• Leave the thermostat in the boiling water for five
minutes or more before measuring the valve lift.
• Hold the thermostat with a wire or the like to
avoid contacting the container.
Starting temperature to open:
76 — 80°C (169 — 176°F)
Full open temperature:
91°C (196°F)
Total valve lift:
9.0 mm (0.354 in) or more
(A) Thermometer
(B) Thermostat
CO-02420
(A)
(B)
CO(STI)-19
Radiator
COOLING
6. Radiator
A: REMOVAL
CAUTION:
The radiator is pressurized when the engine
and radiator are hot. Wait until engine and radi-
ator cool down before working on the radiator.
1) Disconnect the ground cable from battery.
2) Lift up the vehicle.
3) Remove the under cover. <Ref. to EI-28, RE-
4) Drain engine coolant. <Ref. to CO(STI)-13,
DRAINING OF ENGINE COOLANT, REPLACE-
5) Disconnect the connector (A) from the main fan
motor and the connector (B) from the sub fan mo-
tor.
6) Disconnect the radiator outlet hose from thermo-
stat cover.
7) Lower the vehicle.
8) Remove the air intake duct. <Ref. to IN(STI)-10,
9) Remove the reservoir tank. <Ref. to CO(STI)-27,
10) Disconnect the radiator inlet hose from the ra-
diator.
11) Disconnect the two engine coolant hoses from
the radiator and over flow pipe.
12) Remove the radiator upper brackets.
IN-00203
(A)
CO-02727
(B)
CO-02728
CO-02771
CO-02712
CO-02713
CO-02407
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст