2004 INFINITI FX35 dimensions

EM-104
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
5. Install the valves.

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

Install smaller pitch end (paint mark) to cylinder head side
(valve spring seat side).
7. Install valve spring retainer.
8. Install valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with 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.
10. Install spark plug tube.

Press-fit spark plug tube following procedure below.
a. Remove old liquid gasket adhering to cylinder-head mounting
hole.
b. Apply liquid gasket to area within approximately 12 mm (0.47 in)
from edge of spark plug tube press-fit side.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
c. Using a 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.
Inspection After DisassemblyABS004XA
VALVE DIMENSIONS

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

If dimensions are out of the standard, replace valve.
SEM085D
PBIC1803E
Standard press-fit height “H”:
: 38.55 - 38.65 mm (1.5177 - 1.5217 in)
KBIA1248E
SEM188A

EM-106
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
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 suitable tool.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
3. Using valve guide reamer, ream cylinder head valve guide hole.
4. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
5. Press valve guide from camshaft side to dimensions as in illus-
tration.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer, apply reamer finish to valve guide.
SEM931C
Valve guide hole diameter (for service parts):
Intake and exhaust
: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
Projection “L”
Intake and exhaust
: 12.6 - 12.8 mm (0.496 - 0.504 in)
SEM950E
Standard:
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
VALVE SEAT CONTACT

After confirming that the dimensions of valve guides and valves
are within 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.
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.
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 the 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.
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake: 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust: 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A

EM-108
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions.
CAUTION:
When using valve seat cutter, firmly grip the 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.
Grind to obtain the dimensions indicated.
*1 : Diameter made by intersection point of conic angles 60°
and 90°
*2 : Diameter made by intersection point of conic angles
89.5° and 120°
6. Using compound, grind to adjust valve fitting.
7. Check for normal contact again.
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.
SEM934C
Standard:
D1 dia.: 35 mm (1.38 in)*
1
D2 dia.: 36.6 - 36.8 mm (1.441 - 1.449 in)*2
D3 dia.: 28.7 mm (1.130 in)*1
D4 dia.: 30.6 - 30.8 mm (1.205 - 1.213 in)*2
SBIA0531E
Limit : Less than 2.1 mm (0.083 in)
PBIC0080E

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

Check the valve spring pressure at specified spring height.

If the installation load or load with valve open is out of the standard, replace valve spring.Standard:
Intake and exhaust
Free height
: 47.07 mm (1.8531 in)
Installation height
: 37.0 mm (1.457 in)
Installation load
: 166 - 188 N (16.9 - 19.2 kg, 37.3 - 42.3 lb)
Height during valve open
: 27.2 mm (1.0709 in)
Load with valve open
: 373 - 421 N (38.0 - 42.9 kg, 83.9 - 94.6 lb)
SEM113

EM-132
[VQ35DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
When Cylinder Block Is Reused
1. Measure the cylinder block bore inner diameter.
2. Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.
3. Select piston of the same grade.
Piston Selection Table
Unit: mm (in)
NOTE:

Piston is available together with piston pin as an assembly.

Piston pin (piston pin bore) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)

No second grade mark is available on piston.
HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used
Check pin diameter grade number (“0”, “1”, or “2”) stamped in front
of crankshaft, and select connecting rod bearing of same grade
number.
NOTE:
There is no grading for connecting rod big end inner diameter.
When Crankshaft and Connecting Rod Are Reused
1. Measure dimensions of the big end inner diameter of connecting rod and outer diameter of crankshaft pin
individually.
2. Confirm the big end inner diameter of connecting rod is within the standard value.
3. Apply the measured dimension to the “Connecting Rod Bearing Selection Table”.
4. Determine the grade of crankshaft pin diameter grade by comparing the measurement with the values
under the crankshaft pin outer diameter of the “Connecting Rod Bearing Selection Table”.
5. Select connecting rod bearing of the same grade.
Connecting Rod Bearing Selection Table
Unit: mm (in)
Unit: mm (in)
PBIC0812E
Grade 1 2 (or no mark) 3
Inner diameter of cylinder bore95.500 / 95.510
(3.7598 / 3.7602)95.510 / 95.520
(3.7602 / 3.7606)95.520 / 95.530
(3.7606 / 3.7610)
Outer diameter of piston95.480 / 95.490
(3.7590 / 3.7594)95.490 / 95.500
(3.7594 / 3.7598)95.500 / 95.510
(3.7598 / 3.7602)
SEM452G
Connecting rod big end inner diameter 55.000 - 55.013 (2.1654 - 2.1659)
Crankshaft pin outer diameter Grade (Mark) Dimension (Bearing thickness range) Bearing grade No. Color
51.968 - 51.974 (2.0460 - 2.0462) 0 1.500 - 1.503 (0.0591 - 0.0592) STD 0 Black

EM-142
[VQ35DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
CRANKSHAFT PIN JOURNAL DIAMETER

Measure outer diameter of crankshaft pin journal with microme-
ter.

If out of the standard, measure the connecting rod bearing oil
clearance. Then use undersize bearing. Refer to EM-142,
"CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT OUT-OF-ROUND AND TAPER

Using a micrometer, measure the dimensions at “4” different
points shown in the figure on each journal and pin.

Out-of-round is indicated by the difference in dimensions
between “X” and “Y” at “A” and “B”.

Taper is indicated by the difference in dimension between “A”
and “B” at “X” and “Y”.

If the measured value exceeds the limit, correct or replace crankshaft.

If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then
select the main bearing and/or connecting rod bearing. Refer to EM-143, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-142, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT

Place a V-block on a precise flat table to support journals on the
both end of crankshaft.

Place a dial gauge straight up on No. 3 journal.

While rotating crankshaft, read the movement of the pointer on
the dial gauge. (Total indicator reading)

If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation

Install connecting rod bearings to connecting rod and connect-
ing rod bearing cap, and tighten connecting rod bolts to the
specified torque. Using a inside micrometer measure the inner
diameter of connecting rod bearing. Refer to EM-126, "
ASSEM-
BLY" for the tightening procedure.
(Oil clearance) = (Connecting rod bearing inner diameter) – (Crank-
shaft pin diameter)Standard : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Standard
Taper (Difference between “A” and “B”)
: Less than 0.002 mm (0.0001 in)
Out-of-round (Difference between “X” and “Y”)
: Less than 0.002 mm (0.0001 in)
SBIA0535E
Standard : Less than 0.025 mm (0.0010 in)
Limit : Less than 0.10 mm (0.0039 in)
SEM346D
Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
(actual clearance)
Limit : 0.070 mm (0.0028 in)
PBIC1642E

EM-144
[VQ35DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
MAIN BEARING CRUSH HEIGHT

When main bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of bear-
ing must protrude. Refer to EM-126, "
ASSEMBLY" for the tight-
ening procedure.

If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to EM-126,
"ASSEMBLY" for the tightening procedure.

If the standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT OUTER DIAMETER

Measure outer diameters (“d1”, “d2”) at two positions shown in
the figure.

Measure “d2” at a point within block “A”.

When the value of “d1” - “d2” exceeds the limit (a large differ-
ence in dimensions), replace bolt with a new one.
CONNECTING ROD BOLT OUTER DIAMETER

Measure outer diameter “d” at position shown in the figure.

If reduction appears in a position other than “d”, regard it as “d”.

When “d” exceeds the limit (when it becomes thinner), replace
bolt with a new one.Standard : There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
Limit : 0.11 mm (0.0051 in)
PBIC0911E
Standard : 7.90 - 8.00 mm (0.3110 - 0.3150 in)
Limit : 7.75 mm (0.3051 in)
PBIC0912E