2006 INFINITI FX35 exh

EM-96
[VQ35DE]
CAMSHAFT
Revision: 2006 December 2006 FX35/FX45
3. For measured value are out of the standard, perform adjustment. Refer to EM-96, "ADJUSTMENT" .
ADJUSTMENT

Perform adjustment depending on selected head thickness of valve lifter.
1. Measure the valve clearance. Refer to EM-93, "
INSPECTION" .
2. Remove camshaft. Refer to EM-84, "
REMOVAL" .
3. Remove valve lifters at the locations that are out of the standard.
4. Measure the center thickness of the removed valve lifters with a micrometer.
5. Use the equation below to calculate valve lifter thickness for replacement.

Thickness of new valve lifter can be identified by stamp marks
on the reverse side (inside the cylinder).
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of 0.02
mm (0.0008 in) (when manufactured at factory). Refer to EM-154, "
Available Valve Lifter" .
CAUTION:
Install identification letter at the end, “U” and “R”, at each of proper positions. (Be careful of misinstal-
lation between intake and exhaust)
6. Install selected valve lifter.
7. Install camshaft. Refer to EM-88, "
INSTALLATION" .
KBIA0057E
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)*
*: Approximately 20 °C (68 °F)
KBIA0119E
Stamp mark
Thickness
INT EXH
788U
790U ·
·
840U 788R
790R ·
·
840R 7.88 mm
7.90 mm ·
·
8.40 mm

EM-98
[VQ35DE]
OIL SEAL
Revision: 2006 December 2006 FX35/FX45
OIL SEALPFP:00100
Removal and Installation of Valve Oil SealNBS003GT
REMOVAL
1. Remove camshaft relating to valve oil seal to be removed. Refer to EM-83, "CAMSHAFT" .
2. Remove valve lifters. Refer to EM-83, "
CAMSHAFT" .
3. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping into cylinder.
4. Remove valve collet.

Compress valve spring with the valve spring compressor, the
attachment, the adapter (SST). Remove valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
5. Remove valve spring retainer, and valve spring.
6. Remove valve oil seal using the valve oil seal puller (SST).
INSTALLATION
1. Apply new engine oil on new valve oil seal joint and seal lip.
2. Using the valve oil seal drift (SST), press fit valve seal to height “H” shown in figure.
NOTE:
Dimension “H”: Height measured before valve spring seat instal-
lation
3. Install in the reverse order of removal after this step.
PBIC1803E
PBIC0884E
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E

CYLINDER HEAD EM-103
[VQ35DE]
C
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K L
M A
EM
Revision: 2006 December 2006 FX35/FX45
CAUTION:
Temporary fitting means the status that engine is adequately stable though the hoist is released
from hanging.
NOTE:
At the time of the start of this procedure front suspension member is removed, and cylinder head is
hanged by hoist with the engine slinger installed.
3. Release the hoist from hanging, then remove the engine slinger.
4. Remove the following parts:

Fuel tube and fuel injector assembly; Refer to EM-45, "FUEL INJECTOR AND FUEL TUBE" .

Intake manifold; Refer to EM-24, "INTAKE MANIFOLD" .

Exhaust manifold; Refer to EM-26, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .

Water inlet and thermostat assembly; Refer to CO-27, "WATER INLET AND THERMOSTAT ASSEM-
BLY" .

Water outlet, water pipe and heater pipe; Refer to CO-29, "WATER OUTLET AND WATER PIPING" .
5. Remove cylinder head bolts in reverse order as shown in the fig- ure with cylinder head bolt wrench (commercial service tool) and
power tool to remove cylinder heads (right and left banks).
6. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Cylinder Head Bolts Outer Diameter

Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace them with new one.

If reduction of outer diameter appears in a position other than
“d2”, use it as “d2” point.
Cylinder Head Distortion
NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to EM-144, "
CYLIN-
DER BLOCK DISTORTION" .
PBIC2057E
Limit (“d1” – “d2”) : 0.11 mm (0.0043 in)
PBIC2480E

CYLINDER HEAD EM-105
[VQ35DE]
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EM
Revision: 2006 December 2006 FX35/FX45
e. Turn all cylinder head bolts 90 degrees clockwise (angle tighten- ing).
CAUTION:
Check the tightening angle by using the angle wrench
(SST). Avoid judgment by visual inspection without SST.

Check tightening angle indicated on the angle wrench indica-
tor plate.
f. Turn all cylinder head bolts 90 degrees clockwise again (angle tightening).
4. After installing cylinder head, measure distance between front end faces of cylinder block and cylinder head (left and right
banks).

If measured value is out of the standard, re-install cylinder
head.
5. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following 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.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
PBIC0888E
Standard : 14.1 - 14.9 mm (0.555 - 0.587 in)
EMQ0662D
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

EM-106
[VQ35DE]
CYLINDER HEAD
Revision: 2006 December 2006 FX35/FX45
Disassembly and AssemblyNBS003GZ
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.

Identify installation positions, and store them without mixing them up.
3. Remove valve collet.

Compress valve spring with the valve spring compressor, the
attachment and the adapter (SST). Remove valve collet with
a magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer, valve spring and valve spring seat.
5. Push valve stem to combustion chamber side, and remove valve.

Identify installation positions, and store them without mixing them up.
1. Valve lifter 2. Valve collet 3. Valve spring retainer
4. Valve spring 5. Valve oil seal 6. Valve spring seat
7. Valve guide 8. Spark plug 9. Spark plug tube
10. Cylinder head (right bank) 11. Valve seat 12. Valve (EXH)
13. Valve (INT) 14. Cylinder head (left bank)
PBIC2637E
PBIC1803E

CYLINDER HEAD EM-107
[VQ35DE]
C
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EM
Revision: 2006 December 2006 FX35/FX45
6. Remove valve oil seal using the valve oil seal puller (SST).
7. If valve seat must be replaced, refer to EM-110, "
VALVE SEAT REPLACEMENT" .
8. If valve guide must be replaced, refer to EM-109, "
VALVE GUIDE REPLACEMENT" .
9. Remove spark plug tube, as necessary.

Using a 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-109, "VALVE GUIDE REPLACEMENT" .
2. When valve seat is removed, install it. Refer to EM-110, "
VALVE SEAT REPLACEMENT" .
3. Install new valve oil seals as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with the valve oil seal drift (SST) to match dimension in the figure.
4. Install valve spring seat.
5. Install valve.

Larger diameter valves are for intake side.
NOTE:
Larger diameter valves are for intake side.
6. Install valve spring (uneven pitch type).

Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).

Intake side and exhaust side valve springs are different.
Install them referring to the following paint mark collar.
7. Install valve spring retainer.
PBIC0884E
Height “H” (Without valve spring seat installed) Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E
Paint mark collarIntake and Exhaust : Blue
SEM085D

EM-108
[VQ35DE]
CYLINDER HEAD
Revision: 2006 December 2006 FX35/FX45
8. Install valve collet.

Compress valve spring with the valve spring compressor, the
attachment and the adapter (SST). Install valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.

Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.
9. Install valve lifter.

Install it in the original position.
10. Install spark plug tube.

Press-fit spark plug tube as follows:
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.
11. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyNBS003H0
VALVE DIMENSIONS

Check the dimensions of each valve. For the dimensions, refer to EM-155, "Valve Dimensions" .

If dimensions are out of the standard, replace valve and check valve seat contact. Refer to EM-110,
"VALVE SEAT CONTACT" .
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 an inside micrometer.
PBIC1803E
Standard press-fit height “H”:
: 38.1 - 39.1 mm (1.500 - 1.539 in)
PBIC2638E
StandardIntake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)
SEM938C

CYLINDER HEAD EM-109
[VQ35DE]
C
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EM
Revision: 2006 December 2006 FX35/FX45
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-109, "
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 a hammer and the valve guide drift
(commercial service tool).
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
3. Using the valve guide reamer (commercial service tool), ream cylinder head valve guide hole. Standard
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit Intake : 0.08 mm (0.0031 in)
Exhaust : 0.10 mm (0.0039 in)
SEM008A
SEM931C
Valve guide hole diameter (for service parts): Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C