Infiniti G37 Coupe. Manual — part 613
AIR CLEANER AND AIR DUCT
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Inspection
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INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for crack or tear.
• If anything is found, replace air duct and resonator assembly
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INTAKE MANIFOLD COLLECTOR
INTAKE MANIFOLD COLLECTOR
Exploded View
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Removal and Installation
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REMOVAL
WARNING:
Never drain engine coolant when the engine is hot to avoid the danger of being scalded.
1.
Remove engine cover with power tool. Refer to
.
2.
Remove air cleaner case and air duct (RH and LH). Refer to
.
3.
Remove electric throttle control actuator as follows:
a.
Drain engine coolant. When water hoses are disconnected, attach plug to prevent engine coolant leak-
age.
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1.
EVAP canister purge control solenoid
valve
2.
Clamp
3.
EVAP hose
4.
EVAP hose
5.
Clamp
6.
Water hose
7.
Water hose
8.
Electric throttle control actuator (bank 1) 9.
Gasket
10. PCV hose
11.
Clamp
12. PCV hose
13. Intake manifold collector
14. Gasket
15. Water hose
16. Water hose
17. Electric throttle control actuator (bank 2) 18. EVAP hose
19.
Manifold absolute Pressure (MAP) sen-
sor
20. EVAP tube assembly
21. EVAP hose
A.
To vacuum pipe
B.
To brake booster
C.
To water outlet (rear)
D.
To PCV valve
E.
To heater pipe
Refer to
for symbols in the figure.
INTAKE MANIFOLD COLLECTOR
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CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belt.
b.
Disconnect water hoses from electric throttle control actuator. When engine coolant is not drained from
radiator, attach plug to water hoses to prevent engine coolant leakage.
c.
Disconnect harness connector.
d.
Loosen mounting bolts in reverse order as shown in the figure.
NOTE:
• When removing only intake manifold collector, move electric
throttle control actuator without disconnecting the water hose.
• The figure shows the electric throttle control actuator (bank 1)
viewed from the air duct side.
• Viewed from the air duct side, the order of loosening mounting
bolts of electric throttle control actuator (bank 2) is the same
as that of the electric throttle control actuator (bank 1).
CAUTION:
Handle carefully to avoid any shock to electric throttle con-
trol actuator.
4.
Disconnect vacuum hose, PCV hose and EVAP hose from intake manifold collector.
5.
Remove EVAP canister purge volume control solenoid valve and EVAP tube assembly from intake mani-
fold collector.
6.
Loosen mounting bolts and nuts with power tool in the reverse
order as shown in the figure to remove intake manifold collector.
INSTALLATION
Note the following, and install in the reverse order of removal.
INTAKE MANIFOLD COLLECTOR
• If stud bolts were removed, install them and tighten to the torque specified below.
• Tighten mounting bolts and nuts in numerical order as shown in the
figure.
WATER HOSE
• Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
• Clamp hose at location of 3 to 7 mm (0.12 to 0.28 in) from hose end.
ELECTRIC THROTTLE CONTROL ACTUATOR (BANK 1 AND BANK 2)
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: Engine front
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: 10.8 N·m (1.1 kg-m, 8 ft-lb)
: Engine front
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INTAKE MANIFOLD COLLECTOR
• Tighten in numerical order as shown in the figure.
NOTE:
• The figure shows the electric throttle control actuator (bank 1)
viewed from the air duct side.
• Viewed from the air duct side, the order of tightening mounting
bolts of electric throttle control actuator (bank 2) is the same as
that of the electric throttle control actuator (bank 1).
• Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is disconnected.
Refer to
EC-18, "THROTTLE VALVE CLOSED POSITION
.
• Perform the “Idle Air Volume Learning” and “Throttle Valve Closed
Position Learning” when electric throttle control actuator is replaced. Refer to
EC-18, "THROTTLE VALVE CLOSED POSITION LEARNING : Description"
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