Subaru Legacy IV (2008 year). Service manual — part 31
FU(H4SO)-13
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
3. Intake Manifold
A: REMOVAL
1) Set the vehicle on a lift.
2) Release the fuel pressure. <Ref. to FU(H4SO)-
43, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
3) Disconnect the ground cable from battery.
4) Open the fuel filler lid, and remove the fuel filler
cap.
5) Lift up the vehicle.
6) Remove the under cover.
7) Drain approximately 3.0
2 (3.2 US qt, 2.6 Imp
qt) of coolant. <Ref. to CO(H4SO)-13, DRAINING
OF ENGINE COOLANT, REPLACEMENT, Engine
Coolant.>
8) Remove the air intake duct and air intake cham-
ber. <Ref. to IN(H4SO)-8, REMOVAL, Air Intake
Duct.> <Ref. to IN(H4SO)-7, REMOVAL, Air Intake
Chamber.>
9) Remove the generator. <Ref. to SC(H4SO)-14,
REMOVAL, Generator.>
10) Disconnect the spark plug cord from the spark
plug.
11) Disconnect the engine coolant hoses (A) from
throttle body.
12) Disconnect the brake booster vacuum hose
(A).
13) Disconnect the PCV hose (A) from intake man-
ifold.
14) Remove the bolt, and disconnect the bulk head
harness connector from the engine harness con-
nector and rear engine hanger.
15) Slide the engine harness connector in the di-
rection of the arrow and remove the rear engine
hanger.
IN-00203
FU-01085
(A)
(A)
FU-02320
(A)
(A)
FU-03956
FU-03924
FU-03925
FU(H4SO)-14
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
16) Disconnect the connectors from the engine
coolant temperature sensor.
17) Disconnect the knock sensor connector.
18) Disconnect the connector from crankshaft posi-
tion sensor.
19) Disconnect the connector from power steering
pump switch (A).
20) Disconnect the connector from the oil pressure
switch (B).
21) Disconnect the connector from the camshaft
position sensor.
22) Disconnect the front oxygen (A/F) sensor con-
nector (A) and rear oxygen sensor connector (B).
23) Disconnect the connector from the oil switching
solenoid valve.
24) Disconnect the connector from the variable
valve lift diagnosis oil pressure switch.
• LH side
• RH side
FU-00055
FU-02713
FU-00056
FU-03251
(B)
(A)
FU-02714
FU-02734
(B)
(A)
FU-02731
FU-02732
FU(H4SO)-15
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
25) Disconnect the connector from the oil tempera-
ture sensor.
26) Remove the EGR pipe from intake manifold.
27) Disconnect the fuel hoses from fuel pipe.
(1) Disconnect the quick connector on the fuel
delivery line by pushing the ST in the direction
of the arrow.
ST
42099AE000
QUICK CONNECTOR
RELEASE
(2) Remove the clip and disconnect the evapo-
ration hose from the pipe.
CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from hoses using a container
or cloth.
28) Remove the bolts which secure intake manifold
to cylinder head.
29) Remove the intake manifold.
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)
2) Connect the fuel delivery hose and evaporation
hose to the fuel pipe. <Ref. to FU(H4SO)-66, IN-
STALLATION, Fuel Delivery and Evaporation
Lines.>
NOTE:
If fuel hoses or clamps are damaged, replace them
with new parts.
3) Install the EGR pipe to intake manifold.
Tightening torque:
34 N·m (3.5 kgf-m, 25.1 ft-lb)
FU-02733
FU-02974
FU-02866
ST
FU-03252
FU-03252
FU-02974
FU(H4SO)-16
Intake Manifold
FUEL INJECTION (FUEL SYSTEMS)
4) Connect the connector to the oil temperature
sensor.
5) Connect the connector to the variable valve lift
diagnosis oil pressure switch.
• LH side
• RH side
6) Connect the connector to the oil switching sole-
noid valve.
7) Connect the front oxygen (A/F) sensor connec-
tor (A) and rear oxygen sensor connector (B).
8) Connect the connectors to camshaft position
sensor.
9) Connect the connector to the power steering
pump switch (A).
10) Connect the connector to the oil pressure
switch (B).
11) Connect the connector to crankshaft position
sensor.
12) Connect the knock sensor connector.
FU-02733
FU-02731
FU-02732
FU-02734
(B)
(A)
FU-02714
FU-03251
(B)
(A)
FU-00056
FU-02713
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