Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 123
FU(w/o STI)-19
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
18) Disconnect the vacuum hose from nipple.
19) Disconnect the air control hose (A) from the
waste gate actuator, and loosen the clamp which
holds the intake duct to the turbocharger.
20) Disconnect the connector (A) from the PCV
hose assembly A and the connector (B) from the
knock sensor.
21) Disconnect the connector from the PCV hose
assembly B and PCV hose assembly C.
22) Disconnect the bulkhead harness connectors
from the engine harness connectors.
23) Remove the engine harness connector from
the engine harness bracket.
FU-05709
FU-05866
(A)
FU-05708
(A)
(B)
FU-06534
FU-06604
FU-06605
FU(w/o STI)-20
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
24) Disconnect the connector (A) from the engine
coolant temperature sensor, connector (B) from the
oil pressure switch, and connector (C) from the
crankshaft position sensor.
25) Disconnect the connector from power steering
pump switch.
26) Disconnect the connector from the secondary
air combination valve.
27) Disconnect the connector from camshaft posi-
tion sensor.
28) Disconnect the connector from the oil flow con-
trol solenoid valve.
29) Lift up the vehicle.
FU-05711
(C)
(B)
(A)
FU-04598
FU-05712
FU-04616
FU-06535
FU(w/o STI)-21
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
30) Disconnect the connector from ignition coil.
31) Lower the vehicle.
32) Disconnect the connector from the front oxygen
(A/F) sensor, and remove the clip (A) and stay (B)
which hold the engine harness to the rocker cover
RH.
33) Attach ST to the fuel delivery pipe and push ST
in the direction of arrow mark to disconnect the fuel
delivery hose.
ST 42099AE000 QUICK CONNECTOR RE-
LEASE
CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from hoses using a container
or cloth.
34) Disconnect the fuel return hose using the ST.
ST 18371AA000 CONNECTOR REMOVER
CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from hoses using a container
or cloth.
(1) Attach ST to the fuel return pipe as shown in
the figure.
FU-06536
FU-05714
(A)
(B)
(A) Fuel delivery hose
(B) Fuel return hose
(C) Evaporation hose
FU-06537
(C)
ST
(B)
(A)
ME-04969
ST
FU(w/o STI)-22
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
(2) Insert the front side of ST into the quick con-
nector.
(3) Insert the back side of ST into the quick con-
nector and push ST in the direction of arrow
mark to disconnect the fuel return hose.
35) Remove the clip and disconnect the evapora-
tion hose from the fuel pipe.
36) Remove the intake manifold from cylinder
head.
B: INSTALLATION
1) Install the intake manifold onto cylinder heads.
NOTE:
Use a new gasket.
Tightening torque:
25 N·m (2.5 kgf-m, 18.4 ft-lb)
ME-04970
ST
ME-04971
ST
FU-04611
FU-06538
FU-06538
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