Nissan Quest E52. Instruction — part 570
INTAKE MANIFOLD COLLECTOR
EM-29
< REMOVAL AND INSTALLATION >
[VQ35DE]
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Removal and Installation
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REMOVAL
WARNING:
To avoid the danger of being scalded, never drain engine coolant when the engine is hot.
1.
Remove engine cover. Refer to
.
CAUTION:
Be careful not to damage or scratch engine cover.
2.
Remove air cleaner cases (upper and lower) with mass air flow sensor and air duct assembly. Refer to
3.
Prevent engine coolant leakage by draining engine coolant or attaching plug after disconnecting water
hoses. Refer to
CAUTION:
Perform this step when the engine is cold.
NOTE:
The above step is not required when removing only intake manifold collector.
4.
Remove electric throttle control actuator as follows:
NOTE:
Water hose is not required to be disconnected when removing only intake manifold collector.
• Loosen mounting bolts in the reverse order as shown in the
figure to remove.
CAUTION:
• Handle carefully to avoid any shock to electric throttle
control actuator.
• Never disassemble.
5.
Remove the following parts:
• Vacuum hose
• PCV hose
• Electronic controlled engine mount control solenoid valve
6.
Remove power steering hose located on the high pressure side from the rear of intake manifold collec-
tor.
7.
Disconnect EVAP hoses and harness connector from EVAP canister purge volume control solenoid valve.
8.
Loosen mounting nuts and bolts in the reverse order as shown
in the figure, and remove intake manifold collector and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold Collector
JPBIA1631ZZ
: Engine front
JPBIA1628ZZ
EM-30
< REMOVAL AND INSTALLATION >
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Tighten mounting nuts and bolts in numerical order as shown in the
figure.
Electric Throttle Control Actuator
• Tighten mounting bolts in numerical order as shown in the figure.
• Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is disconnected.
Refer to
• Perform the “Idle Air Volume Learning” and “Throttle Valve Closed
Position Learning” when electric throttle control actuator is
replaced. Refer to
: Engine front
JPBIA1628ZZ
JPBIA1631ZZ
INTAKE MANIFOLD
EM-31
< REMOVAL AND INSTALLATION >
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INTAKE MANIFOLD
Exploded View
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Removal and Installation
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REMOVAL
1.
Release fuel pressure. Refer to
2.
Remove intake manifold collector. Refer to
EM-29, "Removal and Installation"
3.
Remove fuel tube and fuel injector assembly. Refer to
.
4.
Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold with power tool.
CAUTION:
• Put identification marks on the intake manifold and cylin-
der head with paint for installing in the right direction.
• Cover the opening with tape to prevent the entry of for-
eign matter into the engine.
5.
Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSTALLATION
Note the following, and install in the reverse order or removal.
Intake Manifold
• If stud bolts were removed, install them and tighten to the specified torque below.
1.
Intake manifold
2.
Gasket
A.
Comply with the assembly procedure
when tightening. Refer to
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
JPBIA1629GB
: Engine front
JPBIA1630ZZ
EM-32
< REMOVAL AND INSTALLATION >
[VQ35DE]
INTAKE MANIFOLD
• Tighten all mounting nuts and bolts to the specified torque in two or
more steps in numerical order shown in the figure.
CAUTION:
Install manifold, according to the marks put on the intake
manifold and cylinder head.
Inspection
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INSPECTION AFTER REMOVAL
Surface Distortion
• Check the surface distortion of the intake manifold mating surface
with a straightedge (A) and a feeler gauge (B).
• If it exceeds the limit, replace intake manifold.
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
: Engine front
1st step
: 7.4 N·m (0.75 kg-m, 5 ft-lb)
2nd step and after
: 25.5 N·m (2.6 kg-m, 19 ft-lb)
JPBIA1630ZZ
Limit
: Refer to
JPBIA0015ZZ
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