2006 INFINITI FX35 exh

PRECAUTIONS EM-165
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Revision: 2006 December 2006 FX35/FX45

When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.

Replace with new gasket, packing, oil seal or O-ring.

Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.

Guide pins are used for several parts alignment. When replacing and reassembling parts with guide pins,
make sure that guide pins are installed in the original portion.

Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.

Release air within route when refilling after draining engine coolant.

After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Parts Requiring Angle TighteningNBS003HG

Use angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap nuts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)

Do not use a torque value for final tightening.

The torque value for these parts are for a preliminary step.

Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketNBS003HH
REMOVAL OF LIQUID GASKET SEALING

After removing mounting nuts and bolts, separate the mating
surface using seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown in the figure.

In areas where seal cutter (SST) is difficult to use, use plastic
hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using scraper, remove old liquid gasket adhering to the liquid gasket application surface and the mating surface.

Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur- face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
PBIC0002E
PBIC0003E

EM-170
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PREPARATION
Revision: 2006 December 2006 FX35/FX45
(—)
Valve seat cutter set Finishing valve seat dimensions
(—)
Piston ring expander Removing and installing piston ring
(—)
Valve guide drift Removing and installing valve guide
Intake and Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.
(—)
Valve guide reamer (1): Reaming valve guide inner hole
(2): Reaming hole for oversize valve guide
Intake and Exhaust:
d
1 : 6.0 mm (0.236 in) dia.
d
2 : 10.2 mm (0.402 in) dia.
(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleaner Reconditioning the exhaust system threads
before installing a new heated oxygen
sensor (Use with anti-seize lubricant shown
below.)
a: J-43897-18 (18 mm dia.) for zirconia
heated oxygen sensor
b: J-43897-12 (12 mm dia.) for titania
heated oxygen sensor
(—)
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL
specification MIL-A-907) Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
(Kent-Moore No.)
Tool name Description
S-NT048
S-NT030
S-NT015
S-NT016
AEM488
AEM489

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-183
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Revision: 2006 December 2006 FX35/FX45
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
ComponentsNBS003HZ

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003I0
REMOVAL
WARNING:
Perform the work, when the exhaust and cooling system have completely cooled down.
1. Remove engine cover with power tool. Refer to EM-173, "
ENGINE ROOM COVER" .
2. Remove front and rear engine undercovers with power tool.
3. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator assembly. Refer to EM-177, "
AIR CLEANER AND AIR DUCT" .
4. Remove front cross bar. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
5. Drain engine coolant from radiator. Refer to CO-38, "
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-41, "
RADIATOR" .
1. Air fuel ratio sensor 1 (bank 2) 2. Exhaust manifold cover (right bank) 3. Exhaust manifold (right bank)
4. Gasket 5. Exhaust manifold (left bank) 6. Exhaust manifold cover (left bank)
7. Air fuel ratio sensor 1 (bank 1) 8. Three way catalyst cover (right bank) 9. Three way catalyst (right bank)
10. Heated oxygen sensor 2 (bank 2) 11. Gasket 12. Three way catalyst cover (left bank)
13. Heated oxygen sensor 2 (bank 1) 14. Three way catalyst (left bank) 15. Mounting bracket
16. Mounting bracket
A. Protrusion for installation confirma-
tion.
:Above
PBIC4549E

EM-184
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 December 2006 FX35/FX45
7. Remove drive belts. Refer to EM-174, "DRIVE BELTS" .
8. Remove air fuel ratio sensor 1 and heated oxygen sensor 2 as follows:
a. Disconnect air fuel ratio sensor 1 and heated oxygen sensor 2 harness connectors.
b. Remove air fuel ratio sensor 1 and heated oxygen sensor 2 on both bank with heated oxygen sensor wrench (SST).
CAUTION:

Be careful not to damage air fuel ratio sensor 1 and
heated oxygen sensor 2.

Discard any air fuel ratio sensor 1 and heated oxygen
sensor 2 which have been dropped onto a hard surface
such as a concrete floor; replace with a new one.
9. Remove exhaust mounting bracket between three way catalysts (right and left bank) and transmission. Refer to EX-3, "
EXHAUST SYSTEM" .
10. Disconnect A/C piping from A/C compressor, then remove A/C compressor with power tool. Refer to AT C -
139, "Components" .
11. Remove alternator and bracket. Refer to SC-20, "
CHARGING SYSTEM" .
12. Remove exhaust front tube with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
13. Remove steering lower joint at power steering gear assembly side, and release steering lower shaft. Refer to PS-17, "
POWER STEERING GEAR AND LINKAGE" .
14. Remove three way catalysts (right and left bank).
15. Remove exhaust manifold covers. (right and left bank)
PBIC2333E
PBIC2334E

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-185
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Revision: 2006 December 2006 FX35/FX45
16. Loosen mounting nuts in reverse order as shown in the figure to remove exhaust manifold.
NOTE:
Disregard the numerical order No. 9 to 12 in removal.
17. Remove exhaust manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the each exhaust manifold flange
mating surface with straightedge and feeler gauge.

If it exceeds the limit, replace exhaust manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket
Install exhaust manifold gasket with its directional protrusion set upward.
Refer to the figure of components on former page. Refer to EM-183, "
Removal and Installation" .
A : Left bank
B : Right bank
: Engine front
PBIC3300E
Limit : 0.3 mm (0.012 in)
PBIC1550E

EM-186
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EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 December 2006 FX35/FX45
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 and Heated Oxygen Sensor

Install air fuel ratio sensors and heated oxygen sensors in the original position.

Install referring the following if the installation positions cannot
be identified.
CAUTION:

Before installing a new air fuel ratio sensor and heated oxy-
gen sensor, 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 and heated oxygen sensor. Doing so may cause damage to
the heated oxygen sensor, resulting in “MIL” coming on.
A : Left bank
B : Right bank
: Engine front
PBIC3300E
Glass tube color Air fuel ratio sensor 1 : Black
Heated oxygen sensor 2 : White
PBIC2652E

EM-204
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TIMING CHAIN
Revision: 2006 December 2006 FX35/FX45

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and InstallationNBS003IC
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-243, "ENGINE ASSEMBLY" .
2. Remove the following components and related parts:

Drive belt auto tensioner and idler pulley; Refer to EM-176, "Drive Belt Auto Tensioner and Idler Pulley"
.

Thermostat housing and hoses; Refer to CO-53, "THERMOSTAT AND WATER CONTROL VALVE" .

Ignition coil; Refer to EM-191, "IGNITION COIL" .

Rocker cover; Refer to EM-200, "ROCKER COVER" .
3. If necessary, remove intake valve timing control position sensor (right and left bank) and camshaft position sensor (PHASE) from
intake valve timing control cover and front cover.
CAUTION:

Handle carefully to avoid dropping and shocks.

Do not disassemble.
4. If necessary, remove intake valve timing control solenoid valve from intake valve timing control cover. CAUTION:

Handle components and parts carefully to avoid dropping and shocks.

Do not disassemble.

Do not allow metal powder to adhere to magnetic part at sensor tip.

Do not place sensors in a location where they are exposed to magnetism.
1. Camshaft sprocket (EXH) 2. Camshaft sprocket (INT) 3. Camshaft sprocket (INT)
4. Camshaft sprocket (EXH) 5. Front cover 6. Intake valve timing control solenoid
valve (right bank)
7. O-ring 8. Seal ring 9. Intake valve timing control position
sensor (right bank)
10. O-ring 11. Intake valve timing control cover
(right bank) 12.Intake valve timing control position
sensor (left bank)
13. O-ring 14. Intake valve timing control cover (left
bank) 15. Seal ring
16. Intake valve timing control solenoid
valve (left bank) 17. O-ring 18. Oil level gauge
19. Oil level gauge guide 20. O-ring 21. Crankshaft pulley bolt
22. Crankshaft pulley 23. Front oil seal 24. Chain tensioner cover
25. Camshaft position sensor (PHASE) 26. O-ring 27. Oil pump drive spacer
28. Oil pump assembly 29. Crankshaft sprocket 30. O-ring
31. O-ring 32. Timing chain tension guide
(right bank) 33.
Timing chain slack guide
(right bank)
34. Timing chain (right bank) 35. Timing chain (left bank) 36. Chain tensioner (left bank)
37. Chain tensioner (right bank) 38. Timing chain slack guide
(left bank) 39.
Timing chain tension guide
(left bank)
40. O-ring
A. Refer to EM-208
.
PBIC0050E

TIMING CHAIN EM-205
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Revision: 2006 December 2006 FX35/FX45
5. Remove intake valve timing control cover as follows:
a. Loosen and remove mounting bolts in the reverse order as shown in the figure.
b . U s e s e a l c u t t e r [ S S T: K V 1 0 1111 0 0 ( J 3 7 2 2 8 ) ] t o c u t l i q u i d g a s k e t for removal.
CAUTION:

Exercise care not to damage mating surfaces.

Pull out cover keeping levelness without an angle, as
inner part of cover is engaged with the center of camshaft
sprocket (INT).
6. Remove O-rings from front cover.
7. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
a. Rotate crankshaft pulley clockwise to align the TDC identifica- tion notch (without paint mark) with timing indicator on front
cover.
b. Make sure that both intake and exhaust cam noses of No. 1 cyl- inder (engine front side of left bank) are located as shown in the
figure.

If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.
8. Remove crankshaft pulley as follows:
PBIC0051E
SBIA0374E
PBIC2341E
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