dimensions INFINITI FX35 2008 User Guide

CYLINDER BLOCKEM-145
< SERVICE INFORMATION > [VQ35DE]
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 Measure the outer diameter of crankshaft pin journal with a
micrometer.
 If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer to "CONNECTING
ROD BEARING OIL CLEARANCE".
CRANKSHAFT OUT-OF-ROUND AND TAPER
 Measure the dimensions at four different points as shown in thefigure on each main journal and pin journal with a micrometer.
 Out-of-round is indicated by t he difference in the dimensions
between “X” and “Y” at “A” and “B”.
 Taper is indicated by the difference in the dimensions between “A” and “B” at “X” and “Y”.
 If the measured value exceeds the li mit, 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 "MAIN BEARING OIL CLEARANCE" and/or
"CONNECTING ROD BEARING OIL CLEARANCE".
CRANKSHAFT RUNOUT
 Place V-block on precise flat table, and support the journals on the both end of crankshaft.
 Place a dial indicator straight up on the No. 3 journal.
 While rotating crankshaft, read the movement of the pointer on a dial indicator. (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 connecting rod cap, and tighten connecting rod bolts to the specified torque.
Refer to EM-123, "
Disassembly and Assembly" for the tightening
procedure.
 Measure the inner diameter of connecting rod bearing with an
inside micrometer.
(Oil clearance) = (Connecting rod bearing inner diameter) – (Crank-
shaft pin journal diameter) Standard : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Limit:
Out-of-round (Differen ce between “X” and “Y”)
: 0.002 mm (0.0001 in)
Taper (Difference between “A” and “B”) : 0.002 mm (0.0001 in)
SBIA0535E
Standard : Less than 0.05 mm (0.0020 in)
Limit : 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
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CYLINDER BLOCKEM-147
< SERVICE INFORMATION > [VQ35DE]
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 Remove main bearing caps and bearings, and using the scale on
the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING CRUSH HEIGHT
 When main bearing cap is removed after being tightened to thespecified torque with main bearings installed, the tip end of bearing
must protrude. Refer to EM-123, "
Disassembly and Assembly" for
the tightening procedure.
 If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT
 When connecting rod bearing cap is removed after being tightened to the specified torque with connecting rod bearings installed, the
tip end of bearing must protrude. Refer to EM-123, "
Disassembly
and Assembly" for the tightening procedure.
 If the standard is not met, replace connecting rod bearings.
MAIN BEARING CAP BOLT OUTER DIAMETER
 Measure the outer diameters (“d1”, “d2”) at two positions as shown
in the figure.
 If reduction appears in “A” range, regard it as “d
2”.
 If it exceeds the limit (large difference in dimensions), replace main bearing cap bolt with new one.
CONNECTING ROD BOLT OUTER DIAMETER
PBIC1149E
Standard : There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
Limit (“d1” – “d2”) : 0.11 mm (0.0043 in)
PBIC0911E
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EM-152
< SERVICE INFORMATION >[VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
CYLINDER HEAD
Unit: mm (in)
Valve Dimensions
814U 814R 814V 8.14 (0.3205)
816U 816R 816V 8.16 (0.3213) 818U 818R 818V 8.18 (0.3220)
820U 820R 820V 8.20 (0.3228)
822U 822R 822V 8.22 (0.3236)
824U 824R 824V 8.24 (0.3244)
826U 826R 826V 8.26 (0.3252)
828U 828R 828V 8.28 (0.3260)
830U 830R 830V 8.30 (0.3268)
832U 832R 832V 8.32 (0.3276)
834U 834R 834V 8.34 (0.3283)
836U 836R 836V 8.36 (0.3291)
838U 838R 838V 8.38 (0.3299)
840U 840R 840V 8.40 (0.3307) Identification (stamped) mark Thickness
SEM758G
Items Standard Limit
Head surface distortion Less than 0.03 (0.0012) 0.1 (0.004)
Normal cylinder head height “H” 126.3 - 126.5 (4.97 - 4.98) —
PBIC0924E
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EM-162
< SERVICE INFORMATION >[VK45DE]
PRECAUTIONS
3. Attach liquid gasket tube to t
ube presser (commercial service
tool).
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44
.
4. Apply liquid gasket without breaks to the specif ied location with the specified dimensions.
 If there is a groove for the liquid gasket application, apply liquid gasket to the groove.
 As for the bolt holes, normally apply liquid gasket inside the holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.
 Within five minutes of liquid gasket application, install the mat-
ing component.
 If liquid gasket protrudes, wipe it off immediately.
 Do not retighten after the installation.
 Wait 30 minutes or more after installation before refilling engine with engine oil and engine coolant.
CAUTION:
If there are specific instruct ions in this manual, observe
them.
EMA0622D
SEM159F
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PREPARATIONEM-165
< SERVICE INFORMATION > [VK45DE]
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(Kent-Moore No.)
Tool name
Description
(—)
Tube presser Pressing the tube of liquid gasket
(—)
Power tool Loosening nuts and bolts
(—)
Spark plug wrench Removing and installing spark plug
(—)
Manual lift table caddy Removing and installing engine
(J–24239-01)
Cylinder head bolt wrench Loosening and tightening cylinder head bolt,
and use with angle wrench [SST:
KV10112100 (BT–8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
(—)
Valve seat cutter set Finishing valve seat dimensions
(—)
Piston ring expander Removing and installing piston ring
S-NT052
PBIC0190E
S-NT047
ZZA1210D
NT583
S-NT048
S-NT030
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EM-232
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
 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.  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 S ealant or equivalent. Refer to GI-44, "
Recommended Chemi-
cal Product and Sealant".
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 DisassemblyINFOID:0000000001325800
VALVE DIMENSIONS
 Check the dimensions of each valve. For the dimensions, refer to EM-266, "
Standard and Limit".
 If the dimensions are out of t he standard, replace valve and check
the valve seat contact. Refer to "VALVE SEAT CONTACT".
VALVE GUIDE CLEARANCE
Valve Stem Diameter
PBIC2360E
Standard press-fit height “H” :
38.4 - 39.4 mm (1.512 - 1.551 in)
PBIC2638E
SEM188A
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EM-234
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
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 avo id getting burned.
6. Using valve guide reamer (commercial service tool), apply reamer finish to valve guide.
VALVE SEAT CONTACT
 After confirming that the dimensi ons 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 surface.
 Check if the contact area band is continuous all around the circum- ference.
 If not, grind to adjust valve fitting and check again. If the contacting surface still has “NG” conditions even after the re-check, replace
valve seat. Refer to "VALVE SEAT REPLACEMENT". 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
SBIA0322E
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CYLINDER HEADEM-235
< SERVICE INFORMATION > [VK45DE]
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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 shoul d not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-266, "
Standard and Limit".
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. Wh en 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-266, "
Standard and Limit".
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on with cutter or cu tting many different times may
result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to "VALVE SEAT CONTACT".
VALVE SPRING SQUARENESS
Oversize (Service) [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
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EM-236
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
 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 (1.8248 - 1.8445 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
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EM-262
< SERVICE INFORMATION >[VK45DE]
CYLINDER BLOCK
Re-boring Cylinder Bore
1. Cylinder bore size is determined by adding piston to
cylinder bore clearance to piston skirt diameter.
2. Install main bearing caps and main bearing, and tight en to the specified torque. Otherwise, cylinder bores
may be distorted in final assembly.
3. Cut cylinder bores. NOTE:
 When any cylinder needs boring, all other cylinders must also be bored.
 Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a
time.
4. Hone cylinders to obtain the specified piston to cylinder bore clearance.
5. Measure finished cylinder bore for the out-of-round and taper. NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT MAIN JOURNAL DIAMETER
 Measure the outer diameter of crankshaft main journals with micrometer.
 If out of the standard, measure t he main bearing oil clearance. Then use undersize bearing. Refer to "MAIN
BEARING OIL CLEARANCE".
CRANKSHAFT PIN JOURNAL DIAMETER
 Measure the outer diameter of crankshaft pin journal with micrometer.
 If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing. Refer to "CONNECTING
ROD BEARING OIL CLEARANCE".
CRANKSHAFT OUT-OF-ROUND AND TAPER
 Measure the dimensions at four different points as shown in thefigure on each main journal and pin journal with micrometer.
 Out-of-round is indicated by the difference in the dimensions between “X” and “Y” at “A” and “B”.
 Taper is indicated by the difference in the dimensions between “A”
and “B” at “X” and “Y”.
 If the measured value exceeds the lim it, correct or replace crankshaft.
Re-bored size calculation: D = A + B – C
where,
D: Bored diameter
A: Piston skirt diameter as measured
B: Piston to cylinder bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)
Standard : 63.940 - 63.964 mm (2.5173 - 2.5183 in) dia.
Standard : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Limit: Out-of-round (Difference between “X” and “Y”) : 0.015 mm (0.0006 in)
Taper (Difference between “A” and “B”) : 0.010 mm (0.0004 in)
PBIC1685E
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