2006 INFINITI M35 fuel

EXHAUST MANIFOLD AND THREE WAY CATALYST
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Revision: 2006 January2006 M35/M45
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
ComponentsNBS004OV
Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004OW
REMOVAL
WAR NING :
Perform the work when the exhaust and cooling system have completely cooled down.
1. Remove engine room cover (RH and LH). Refer to EM-173, "
ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Remove air duct (inlet), air cleaner case and air duct and resonator assembly. Refer to EM-177, "
AIR
CLEANER AND AIR DUCT" .
4. Remove front and rear engine undercovers with power tool.
1. Harness bracket 2. Exhaust manifold cover (right bank) 3.Exhaust manifold and three way cat-
alyst (right bank)
4. Air fuel ratio sensor 1 (bank 2) 5. Gasket 6. Harness bracket
7. Air fuel ratio sensor 1 (bank 1) 8.Exhaust manifold and three way cat-
alyst (left bank)9. Exhaust manifold cover (left bank)
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 January2006 M35/M45
5. Drain engine coolant from radiator. Refer to CO-40, "Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
6. Remove radiator. Refer to CO-43, "
RADIATOR" .
7. Remove drive belts. Refer to EM-174, "
DRIVE BELTS" .
8. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
9. Remove air fuel ratio sensor 1 as follows:
a. Disconnect harness connector of each air fuel ratio sensor 1.
b. Remove air fuel ratio sensor 1 on both bank with heated oxygen
sensor wrench (SST).
CAUTION:
Be careful not to damage air fuel ratio sensor 1.
Discard any air fuel ratio sensor 1 which has been
dropped onto a hard surface such as a concrete floor;
replace with a new one.
10. Remove exhaust manifold and three way catalyst (left bank) as follows:
a. Disconnect A/C piping from A/C compressor, then remove A/C compressor with power tool. Refer to AT C -
151, "REFRIGERANT LINES" .
b. Remove steering lower joint to enable steering shaft to move freely. Refer to PS-13, "
STEERING COL-
UMN" .
c. Remove starter motor. Refer to SC-10, "
STARTING SYSTEM" .
d. Remove nuts on bottom of engine mounting insulator (LH), and lift up left side of engine approximately 3
cm (1.18 in) with transmission jack. Refer to EM-244, "
ENGINE ASSEMBLY" .
e. Remove exhaust manifold cover (left bank).
f. Loosen nuts in the reverse order of figure to remove exhaust
manifold and three way catalyst (left bank) with power tool.
NOTE:
Disregard No. 9 to No. 12 when loosening.
11. Remove exhaust manifold and three way catalyst (right bank) as follows:
a. Remove alternator and bracket. Refer to SC-23, "
CHARGING SYSTEM" .
PBIC2333E
A : Left bank
B : Right bank
: Engine front
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 January2006 M35/M45
Exhaust Manifold Gasket
Install exhaust manifold gasket with its directional protrusion set
upward.
Exhaust Manifold
Install exhaust manifold and tighten mounting nuts in numerical
order as shown in the figure.
NOTE:
Tighten mounting nuts No. 1 to 4 in two steps. The numerical
order No. 9 to 12 shown second steps.
Air Fuel Ratio Sensor
CAUTION:
Before installing a new air fuel ratio sensor 1, clean exhaust system threads using oxygen sensor
thread cleaner (commercial service tool: J-43897-18 or J-43897-12), and apply anti-seize lubricant
(commercial service tool).
Do not over torque air fuel ratio sensor. Doing so may cause damage to the air fuel ratio sensor 1,
resulting in “MIL” coming on.
A : Protrusion for confirming installation
: Above
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A : Left bank
B : Right bank
: Engine front
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FUEL INJECTOR AND FUEL TUBE
EM-193
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Revision: 2006 January2006 M35/M45
FUEL INJECTOR AND FUEL TUBEPFP:16600
ComponentsNBS004P3
CAUTION:
Do not remove or disassemble parts unless instructed as shown in the figure.
Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS004P4
REMOVAL
WAR NING :
Put a “CAUTION: FLAMMABLE” sign in the workshop.
Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.
Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
1. Remove engine room cover (RH and LH). Refer to EM-173, "
ENGINE ROOM COVER" .
2. Remove engine cover with power tool. Refer to EM-179, "
INTAKE MANIFOLD" .
3. Release fuel pressure. Refer to EC-809, "
FUEL PRESSURE RELEASE" .
1. Quick connector cap 2. Fuel feed hose 3. Fuel feed hose bracket
4. Quick connector cap 5. O-ring 6. Fuel tube (RH)
7. Spacer 8. Fuel feed damper 9. Fuel damper and fuel hose assembly
10. Clip 11. O-ring (Green) 12. Fuel injector
13. O-ring (Black) 14. Fuel tube (LH)
A. To centralized under-floor piping B. Refer to EM-193
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FUEL INJECTOR AND FUEL TUBE
Revision: 2006 January2006 M35/M45
4. Disconnect fuel feed hose on engine side as follows: (Perform
same procedure for the side of centralized under-floor piping as
well.)
a. Remove quick connector cap from quick connector connection.
b. Disconnect quick connector from fuel feed damper as follows:
CAUTION:
Disconnect quick connector by using quick connector release [SST: J-45488], not by picking out
retainer tabs (centralized under-floor piping side).
i. With the sleeve side of quick connector release facing to quick connector, install quick connector release
onto fuel tube.
ii. Insert quick connector release into quick connector until sleeve
contacts and goes no further. Hold quick connector release on
that position.
CAUTION:
Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.
iii. Draw and pull out quick connector straight from fuel feed
damper.
CAUTION:
Pull quick connector holding “A” position as shown in
the figure.
Do not pull with lateral force applied. O-ring inside quick connector may be damaged.
Prepare container and cloth beforehand as fuel will leak out.
Avoid fire and sparks.
Keep parts away from heat source. Especially, be careful when welding is performed around
them.
Do not expose parts to battery electrolyte or other acids.
Do not bend or twist connection between quick connector and fuel feed hose during installa-
tion/removal.
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FUEL INJECTOR AND FUEL TUBE
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Revision: 2006 January2006 M35/M45
To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags or something similar.
5. Disconnect fuel damper and fuel hose assembly from fuel tubes (RH and LH).
CAUTION:
While hoses are disconnected, plug them to prevent fuel from draining.
Do not separate fuel damper and fuel hose.
6. Disconnect harness connector from fuel injector.
7. Loosen mounting bolts in reverse order as shown in the figure,
and remove fuel tube and fuel injector assembly.
CAUTION:
Do not tilt it, or remaining fuel in pipes may flow out from
pipes.
8. Remove spacers on intake manifold (lower).
9. Remove fuel injector from fuel tube as follows:
a. Open and remove clip.
b. Remove fuel injector from fuel tube by pulling straight.
CAUTION:
Be careful with remaining fuel that may go out from fuel
tube.
Be careful not to damage injector nozzles during
removal.
Do not bump or drop fuel injector.
Do not disassemble fuel injector.
10. Remove fuel feed damper.
INSTALLATION
1. Install fuel feed damper.
When handling new O-rings, be careful of the following caution.
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A. : Right bank
B. : Left bank
: Engine front
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EM-196
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FUEL INJECTOR AND FUEL TUBE
Revision: 2006 January2006 M35/M45
CAUTION:
Handle O-ring with bare hands. Do not wear gloves.
Lubricate O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not
to twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.
Insert new O-ring straight into fuel tube. Do not decenter or twist it.
Insert fuel feed damper straight into fuel tube (RH).
Tighten mounting bolts evenly in turn.
After tightening mounting bolts, make sure that there is no gap between flange and fuel tube (RH).
2. Install new O-rings to fuel injector paying attention to the following caution.
CAUTION:
Upper and lower O-ring are different. Be careful not to confuse them.
Handle O-ring with bare hands. Never wear gloves.
Lubricate O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring. If O-ring was stretched while it was being attached, do not insert it
quickly into fuel tube.
Insert O-ring straight into fuel injector. Do not decenter or twist it.
3. Install fuel injector to fuel tube as follows:
a. Insert clip into clip mounting groove on fuel injector.
Insert clip so that “protrusion A” of fuel injector matches “cut-
out A” of clip.
CAUTION:
Do not reuse clip. Replace it with a new one.
Be careful to keep clip from interfering with O-ring. If
interference occurs, replace O-ring.
b. Insert fuel injector into fuel tube with clip attached.
Insert it while matching it to the axial center.
Insert fuel injector so that “protrusion B” of fuel tube matches
“cutout B” of clip.
Make sure that fuel tube flange is securely fixed in flange fix-
ing groove on clip.
c. Make sure that installation is complete by checking that fuel
injector does not rotate or come off.
Make sure that protrusions of fuel injectors are aligned with
cutouts of clips after installation.
4. Install spacers on intake manifold (lower).
5. Install fuel tube and fuel injector assembly to intake manifold (lower).
CAUTION:
Be careful not to let tip of injector nozzle come in contact with other parts. Fuel tube side : Black
Nozzle side : Green
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FUEL INJECTOR AND FUEL TUBE
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Revision: 2006 January2006 M35/M45
Tighten mounting bolts in two steps in numerical order as
shown in the figure.
6. Connect fuel feed hose on engine side as follows: (Unless otherwise indicated, the installation to the
engine side and centralized under-floor piping side is exactly alike.)
a. Make sure no foreign substances are deposited in and around fuel tube and quick connector, and no dam-
age on them.
b. Thinly apply new engine oil around fuel tube from tip end to spool end.
c. Align center to insert quick connector straightly into fuel tube.
Engine side:
Insert fuel tube into quick connector until top spool is com-
pletely inside quick connector, and 2nd level spool exposes
right below quick connector.
CAUTION:
Hold “A” position as shown in the figure when inserting
fuel tube into quick connector.
Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.
Insert until you hear a “click” sound and actually feel the
engagement.
To avoid misidentification of engagement with a similar sound, be sure to perform the next step.
Centralized under-floor piping side:
Visually confirm that the two retainer tabs are connected to the connector.
CAUTION:
Carefully align center to avoid inclined insertion to prevent damage to O-ring inside quick con-
nector.
Insert until you hear a “click” sound and actually feel the engagement.
To avoid misidentification of engagement with a similar sound, be sure to perform the next step.
d. Pull quick connector by hand holding position. Make sure it is completely engaged (connected) so that it
does not come out from fuel tube.
e. Install quick connector cap on quick connector connection.
CAUTION:
If cap cannot be installed smoothly, quick connector may
have not been installed correctly. Check connection again.
f. Install fuel feed hose to hose clamps.
7. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Check on Fuel Leakage
1. Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
A : Right bank
B : Left bank
: Engine front
1st step : 10.1 Nꞏm (1.0 kg-m, 7 ft-lb)
2nd step : 23.5 Nꞏm (2.4 kg-m, 17 ft-lb)
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