INFINITI FX35 2006 Service Manual

CYLINDER HEAD EM-237
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Revision: 2006 December 2006 FX35/FX45

Identify installation positions, and store them without mixing them up.
6. Remove valve oil seal with valve oil seal puller (SST).
7. If valve seat must be replaced, refer to EM-241, "
VALVE SEAT REPLACEMENT" .
8. If valve guide must be replaced, refer to EM-239, "
VALVE GUIDE REPLACEMENT" .
9. Remove spark plug tube, as necessary.

Using pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:

Take care not to damage cylinder head.

Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless
absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-239, "VALVE GUIDE REPLACEMENT" .
2. When valve seat is removed, install it. Refer to EM-241, "
VALVE SEAT REPLACEMENT" .
3. Install new valve oil seal as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with valve oil seal drift (SST) to match dimension in the figure.
4. Install valve.

Install in the original position.
NOTE:
Larger diameter valves are for intake side.
5. Install valve spring (with valve spring seat).

Install smaller pitch (valve spring seat side) to cylinder head
side.
6. Install valve spring retainer.
PBIC0072E
PBIC0073E
PBIC0074E

EM-238
[VK45DE]
CYLINDER HEAD
Revision: 2006 December 2006 FX35/FX45
7. Install valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnetic
hand.
CAUTION:
When working, take care not to damage valve lifter holes.

Tap stem edge lightly with plastic hammer after installation to
check its installed condition.
8. Install valve lifter and adjusting shim.

Install in the original position.
9. Install spark plug tube as follows:

Press-fit spark plug tube following procedure below.
a. Remove old liquid gasket adhering to cylinder-head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side. Use Genuine High Strength Locking Sealant or equivalent . Refer to GI-48, "
RECOMMENDED
CHEMICAL PRODUCTS AND SEALANTS" .
c. Using drift, press-fit spark plug tube so that its height “H” is as specified in the figure.
CAUTION:

When press-fitting, take care not to deform spark plug
tube.

After press-fitting, wipe off liquid gasket protruding onto
cylinder head upper face.
10. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyNBS003IN
VALVE DIMENSIONS

Check the dimensions of each valve. For the dimensions, refer
to EM-279, "
Valve Dimensions" .

If the dimensions are out of the standard, replace valve and
check the valve seat contact. Refer to EM-241, "
VALVE SEAT
CONTACT" .
PBIC2360E
Standard press-fit height “H” :
: 38.4 - 39.4 mm (1.512 - 1.551 in)
PBIC2638E
SEM188A

CYLINDER HEAD EM-239
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Revision: 2006 December 2006 FX35/FX45
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with inside micrometer.
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).

If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be
replaced, refer to EM-239, "
VALVE GUIDE REPLACEMENT" .
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130 °C (230
to 266 °F) by soaking in heated oil.
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US ton, 2.0 lmp ton) pressure] or hammer and valve guide drift
(commercial service tool).
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned. Standard
Intake : 5.972 - 5.980 mm (0.2351 - 0.2354 in)
Exhaust : 5.962 - 5.970 mm (0.2347 - 0.2350 in)
SEM938C
Standard Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard Intake : 0.020 - 0.046 mm (0.0008 - 0.0018 in)
Exhaust : 0.030 - 0.056 mm (0.0012 - 0.0022 in)
Limit Intake : 0.08 mm (0.003 in)
Exhaust : 0.1 mm (0.004 in)
SEM008A
SEM931C

EM-240
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CYLINDER HEAD
Revision: 2006 December 2006 FX35/FX45
3. Using valve guide reamer (commercial service tool), ream cylin- der head valve guide hole.
4. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil.
5. Using valve guide drift (commercial service tool), press valve guide from camshaft side to the dimensions as in the figure.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer (commercial service tool), apply reamer finish to valve guide. Valve guide hole diameter (for service parts):
Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
PBIC0078E
Standard: Intake and exhaust: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C

CYLINDER HEAD EM-241
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Revision: 2006 December 2006 FX35/FX45
VALVE SEAT CONTACT

After confirming that the dimensions of valve guides and valves
are within the specifications, perform this procedure.

Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.

Check if the contact area band is continuous all around the cir-
cumference.

If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has “NG” conditions even after the re-check,
replace valve seat. Refer to EM-241, "
VALVE SEAT REPLACE-
MENT" .
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess in cylinder head. Set the machine depth stop to ensure this. Refer to EM-280, "
Va l v e S e a t" .
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.

Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.
3. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head. CAUTION:

Avoid directly touching cold valve seats.

Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve seat grinder, finish seat to the specified dimensions. Refer to
EM-280, "
Valve Seat" .
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake : 37.500 - 37.516 mm (1.4764 - 1.4770 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A
SEM934C

EM-242
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CYLINDER HEAD
Revision: 2006 December 2006 FX35/FX45
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to EM-241, "
VALVE SEAT CONTACT" .
VALVE SPRING SQUARENESS

Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.

If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

Check valve spring pressure at the specified spring height.

If the installation load or load with valve open is out of the standard, replace valve spring. Limit : 2.0 mm (0.079 in)
PBIC0080E
Standard:
Intake and exhaustFree height: 46.35 - 46.85 mm (1.8247 - 1.8444 in)
Installation height : 33.8 mm (1.331 in)
Installation load : 165 - 189 N (16.8 - 19.3 kg, 37 - 42 lb)
Height during valve open : 24.4 mm (0.961 in)
Load with valve open : 290 - 330 N (29.6 - 33.7 kg, 65 - 74 lb)
SEM113

ENGINE ASSEMBLY EM-243
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Revision: 2006 December 2006 FX35/FX45
ENGINE ASSEMBLYPFP:10001
ComponentsNBS003IO
Removal and InstallationNBS003IP
WARNING:

Situate vehicle on a flat and solid surface.

Place chocks at front and back of rear wheels.

For engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.
CAUTION:

Always be careful to work safely, avoid forceful or uninstructed operations.

Do not start working until exhaust system and engine coolant are cool enough.

If items or work required are not covered by the engine section, refer to the applicable sections.

Always use the support point specified for lifting.

Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.

For supporting points for lifting and jacking point at rear axle, refer to GI-41, "Garage Jack and
Safety Stand" .
REMOVAL
Outline
At first, remove engine, transmission assembly and front final drive with front suspension member from vehicle
downward. Then separate engine from transmission.
1. Engine mounting insulator (rear) 2. Engine rear member 3. Grommet
4. Collar 5. Plate 6. Engine mounting bracket (LH)
7. Engine mounting insulator (LH) 8. Engine mounting bracket (RH) 9. Engine mounting insulator (RH)
PBIC2364E

EM-244
[VK45DE]
ENGINE ASSEMBLY
Revision: 2006 December 2006 FX35/FX45
Preparation
1. Release fuel pressure. Refer to EC-746, "FUEL PRESSURE RELEASE" .
2. 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.
3. Disconnect both battery terminal. Refer to SC-4, "
BATTERY" .
4. Remove crankshaft position sensor (POS) from transmission. CAUTION:

Handle 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.
5. Remove the following parts:

Hood assembly; Refer to BL-13, "HOOD" .

Engine cover; Refer to EM-173, "ENGINE ROOM COVER" .

Front and rear engine undercover

Air duct (inlet), air duct and air cleaner case assembly; Refer to EM-177, "AIR CLEANER AND AIR
DUCT" .

Drive belts; Refer to EM-174, "DRIVE BELTS" .

Radiator and radiator hoses (upper and lower); Refer to CO-41, "RADIATOR" .

Front road wheels and tires
Engine Room LH
1. Disconnect engine room harness from the engine side and set it aside for easier work.
2. Disconnect heater hoses, and install plugs to avoid leakage of engine coolant.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Discharge refrigerant from A/C circuit. Refer to ATC-137, "
REFRIGERANT LINES" .
6. Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to AT C -
139, "Components" .
Engine Room RH
1. Disconnect fuel feed hose and EVAP hose. Refer to EM-194, "FUEL INJECTOR AND FUEL TUBE" .
CAUTION:
Fit plugs onto disconnected hose to prevent fuel leak.
2. Disconnect engine room harness from the engine side and set it aside for easier work.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Disconnect reservoir tank of power steering oil pump from engine, and move it aside for easier work. CAUTION:
When temporarily securing, keep reservoir tank upright to avoid a fluid leak.
Vehicle Underbody
1. Remove front cross bar. Refer to FSU-6, "FRONT SUSPENSION ASSEMBLY" .
2. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope for eas- ier work. Refer to PS-31, "
Removal and Installation (VK45DE Models)" .
3. Remove A/T fluid cooler tube. Refer to AT- 2 6 6 , "
TRANSMISSION ASSEMBLY" .
4. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
5. Remove RH and LH transverse link mounting bolts and nuts. Refer to FSU-14, "
TRANSVERSE LINK" .
6. Disconnect stabilizer connecting rod lower. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
7. Remove A/T control rod at control device assembly side. Then temporarily secure it on transmission, so that it does not sag. Refer to AT- 2 2 9 , "
SHIFT CONTROL SYSTEM" .

ENGINE ASSEMBLY EM-245
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Revision: 2006 December 2006 FX35/FX45
8. Remove rear plate cover from oil pan. Then remove bolts fixing drive plate to torque converter. Refer to EM-187, "
OIL PAN AND OIL STRAINER" and AT- 2 6 6 , "TRANSMISSION ASSEMBLY" .
9. Remove transmission joint bolts which pierce at oil pan lower rear side. Refer to AT- 2 6 6 , "
TRANSMIS-
SION ASSEMBLY" .
10. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft. Refer to PS-12, "
STEERING COLUMN" .
11. Remove rear propeller shaft. Refer to PR-7, "
REAR PROPELLER SHAFT" .

After disconnection, plug the opening on transmission side.
12. Remove front drive shaft (both side). Refer to FAX-12, "
FRONT DRIVE SHAFT" .
13. Remove front propeller shaft. Refer to PR-4, "
FRONT PROPELLER SHAFT" .
14. Remove three way catalyst (both bank). Refer to EM-183, "
EXHAUST MANIFOLD AND THREE WAY
CATALYST" .
Removal Work
1. Install engine slingers into front of cylinder head (left bank) and
front of cylinder head (right bank).
2. Lift with hoist and secure engine in position.
3. Use manual lift table caddy (commercial service tool) or equivalently rigid tool such as transmission jack. Securely support bottom of suspension member and transmission.
CAUTION:
Put a piece of wood or something similar as the supporting surface, secure a completely stable
condition.
4. Remove engine rear member mounting bolts.
5. Remove front suspension member mounting nuts with power tool. Refer to FSU-6, "
FRONT SUSPEN-
SION ASSEMBLY" .
6. Carefully lower jack, or raise lift to remove engine, transmission front final drive and front suspension member assembly. When
performing work, observe the following caution:
CAUTION:

Confirm there is no interference with vehicle.

Make sure that all connection points have been discon-
nected.

Keep in mind the center of vehicle gravity changes. If
necessary, use jack(s) to support vehicle at rear jacking
point(s) to prevent it from falling it off the lift. Slinger bolts:
: 33.4 N·m (3.4 kg-m, 25 ft-lb)
PBIC1556E
PBIC1557E

EM-246
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ENGINE ASSEMBLY
Revision: 2006 December 2006 FX35/FX45
Separation Work
1. Change engine slinger installing to cylinder head (right bank). NOTE:
In order to keep secure position when hoisting engine.
2. Remove engine mounting insulators (RH and LH) under side nut with power tool.
3. Lift with hoist and separate engine and transmission assembly from front suspension member. CAUTION:

Before and during this lifting, always make sure that any harnesses are left connected.

Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.
4. Remove alternator. Refer to SC-20, "
CHARGING SYSTEM" .
5. Remove starter motor. Refer to SC-8, "
STARTING SYSTEM" .
6. Separate engine from transmission assembly. Refer to AT- 2 6 9 , "
Removal and Installation (AWD Models)"
.
7. Remove front final drive from engine. Refer to FFD-13, "
FRONT FINAL DRIVE ASSEMBLY" .
8. Remove engine mounting insulators (RH and LH) and brackets (RH and LH) from engine with power tool.
9. Remove engine rear member and engine mounting insulator (rear) from transmission.
INSTALLATION
Note the following, and install in the reverse order of removal.

Do not allow engine mounting insulator to be damage and careful no engine oil gets on it.

For a location with a positioning pin, insert it securely into hole of mating part.

For a part with a specified installation orientation, refer to component figure in EM-243, "Removal and
Installation" .

When installing engine mounting brackets (RH and LH) on cylin-
der block, tighten two upper bolts (shown as “A” in the figure)
first. Then tighten two lower bolts (shown as “B” in the figure).
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The followings are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

Use procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant. Slinger bolts:
: 33.4 N·m (3.4 kg-m, 25 ft-lb)
PBIC2447E
PBIC2365E