Exhaust INFINITI FX35 2006 Service Manual

CAMSHAFT EM-225
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Revision: 2006 December 2006 FX35/FX45
3. Using small screwdriver, turn the round hole of adjusting shim in the direction of the arrow.
CAUTION:
perform (the above procedure) during camshaft do not con-
tact with adjusting shim.
4. Install lifter stopper [SST: 10115120 (J38972-2)] as follows:
a. Except exhaust side of No. 7 and 8 cylinder;
i. Place camshaft pliers (SST) around camshaft as shown in the figure.
ii. Rotate camshaft pliers so that valve lifter is pushed down. CAUTION:
Be careful not to damage cam surface, valve lifter and cylin-
der head with camshaft pliers.
iii. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter.
CAUTION:

Lifter stopper must be placed as close to camshaft
bracket as possible.

Be careful not to damage cam surface, valve lifter and
cylinder head with lifter stopper.
iv. Remove camshaft pliers. CAUTION:
Camshaft pliers should be removed by rotating it slowly
because lifter stopper hits and damages journal portion by
rotating camshaft pliers quickly.
b. Exhaust side of No. 7 and 8 cylinder;
NOTE:
Exhaust side of No. 7 and 8 cylinder does not have space for installing camshaft pliers [SST: KV10115110
(J38972-1)]. therefore, install lifter stopper [SST: KV10115120 (J38972-2)] according to the following
instructions.
i. Rotate crankshaft to press cam nose to the adjusting part of valve lifter.
ii. Place lifter stopper between camshaft and the edge of valve lifter to retain valve lifter.
CAUTION:

Lifter stopper must be placed as close to camshaft bracket as possible.

Be careful not to damage cam surface, valve lifter and cylinder head with lifter stopper.
iii. Rotate crankshaft slowly 180 degrees clockwise. CAUTION:
Rotating crankshaft slowly because lifter stopper hits and damages journal portion by rotating
crankshaft quickly.
PBIC0047E
PBIC2276E
PBIC1565E

EM-226
[VK45DE]
CAMSHAFT
Revision: 2006 December 2006 FX35/FX45
5. Blow air into the round hole to separate adjusting shim from valve lifter.
CAUTION:
When blowing, use goggles to protect your eye.
6. Remove adjusting shim with magnetic hand.
7. Use the equation below to calculate adjusting shim thickness for replacement.

Using micrometer determine thickness of removed shim with
measured at center.

Calculate thickness of new adjusting shim so valve clearance comes within specified values.
Shims are available in 64 sizes from 2.32 mm (0.0913 in) to 2.95 mm (0.1161 in) in steps of 0.01
mm (0.0004 in). Refer to EM-277, "
Available Adjusting Shims" .
PBIC1566E
PBIC2359E
SEM145D
Valve lifter thickness calculation: t = t1 + (C1 – C2 )
t = Valve lifter thickness to be replaced
t
1 = Removed valve lifter thickness
C
1= Measured valve clearance
C
2= Standard valve clearance: Intake : 0.30 mm (0.012 in)
Exhaust : 0.33 mm (0.013 in)

CAMSHAFT EM-227
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Revision: 2006 December 2006 FX35/FX45

Thickness of new adjusting shim can be identified by stamp
marks on the reverse side (inside the cylinder).
8. Install new adjusting shim using suitable tool.

Install with the surface on which the thickness is
stamped facing down.
9. Remove lifter stopper as follows:
a. Except exhaust side of No. 7 and 8 cylinder;
i. Perform same procedure for removal, place camshaft pliers (SST).
ii. Remove lifter stopper (SST).
iii. Remove camshaft pliers.
b. Exhaust side of No. 7 and 8 cylinder.

Rotate crankshaft slowly 180 degrees clockwise. then remove lifter stopper.
10. Manually turn crankshaft pulley a few turns.
11. Make sure that the valve clearance is within the standard. Refer to EM-222, "
INSPECTION" .
12. Install all removed parts in the reverse order of removal. Refer to EM-219, "
INSTALLATION" .
13. Warm up the engine, and check for unusual noise and vibration.
SEM873E
PBIC1568E
PBIC1569E

CYLINDER HEAD EM-233
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Revision: 2006 December 2006 FX35/FX45

If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.

If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.

If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-748, "
TROUBLE DIAGNOSIS" .
ComponentsNBS003IK
Removal and InstallationNBS003IL
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-243, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-183, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-215, "
CAMSHAFT" .
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2756E

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
[VK45DE]
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
[VK45DE]
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" .