crankshaft INFINITI M35 2006 Factory Service Manual

CYLINDER BLOCK
EM-137
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Revision: 2006 January2006 M35/M45
CAUTION:
In grinding crankshaft pin to use undersize bearings, keep
the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in)
HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used
1. “Main Bearing Selection Table” rows correspond to bearing
housing grade on rear left side of cylinder block.
2. “Main Bearing Selection Table” columns correspond to journal
diameter grade on front side of crankshaft.
3. Select main bearing grade at the point where selected row and column meet in “Main Bearing Selection
Table”.
When Cylinder Block and Crankshaft are Reused
1. Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer
to EM-144, "
MAIN BEARING HOUSING INNER DIAMETER" and EM-145, "CRANKSHAFT MAIN JOUR-
NAL DIAMETER" .
2. Correspond the measured dimension in “Cylinder block main bearing housing inner diameter” row of
“Main Bearing Selection Table”.
3. Correspond the measured dimension in “Crankshaft main journal diameter” column of “Main Bearing
Selection Table”.
4. Select main bearing grade at the point where selected row and column meet in following selection table.
PBIC1908E
Size Thickness
US 0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643)
SEM756G
SEM452G

CYLINDER BLOCK
EM-139
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Revision: 2006 January2006 M35/M45
Main Bearing Grade Table (All Journals)
Undersize Bearing Usage Guide
When the specified main bearing oil clearance is not obtained with standard size main bearings, use
underside (US) bearing.
When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and
grind main journal so that the main bearing oil clearance satisfies the standard.
CAUTION:
In grinding crankshaft main journal to use undersize bear-
ings, keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in) Grade numberThickness
Unit: mm (in)Width
Unit: mm (in)Identification color Remarks
0 2.000 - 2.003 (0.0787 - 0.0789)
19.9 - 20.1
(0.783 - 0.791)Black
Grade and color are
the same for upper
and lower bearings. 1 2.003 - 2.006 (0.0789 - 0.0790) Brown
2 2.006 - 2.009 (0.0790 - 0.0791) Green
3 2.009 - 2.012 (0.0791 - 0.0792) Yellow
4 2.012 - 2.015 (0.0792 - 0.0793) Blue
5 2.015 - 2.018 (0.0793 - 0.0794) Pink
6 2.018 - 2.021 (0.0794 - 0.0796) Purple
7 2.021 - 2.024 (0.0796 - 0.0797) White
01UPR 2.003 - 2.006 (0.0789 - 0.0790) Brown
Grade and color are
different for upper and
lower bearings. LWR 2.000 - 2.003 (0.0787 - 0.0789) Black
12UPR 2.006 - 2.009 (0.0790 - 0.0791) Green
LWR 2.003 - 2.006 (0.0789 - 0.0790) Brown
23UPR 2.009 - 2.012 (0.0791 - 0.0792) Yellow
LWR 2.006 - 2.009 (0.0790 - 0.0791) Green
34UPR 2.012 - 2.015 (0.0792 - 0.0793) Blue
LWR 2.009 - 2.012 (0.0791 - 0.0792) Yellow
45UPR 2.015 - 2.018 (0.0793 - 0.0794) Pink
LWR 2.012 - 2.015 (0.0792 - 0.0793) Blue
56UPR 2.018 - 2.021 (0.0794 - 0.0796) Purple
LWR 2.015 - 2.018 (0.0793 - 0.0794) Pink
67UPR 2.021 - 2.024 (0.0796 - 0.0797) White
LWR 2.018 - 2.021 (0.0794 - 0.0796) Purple
PBIC1908E
Size Thickness
US 0.25 (0.0098) 2.132 - 2.140 (0.0839 - 0.0843)

EM-140
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
Inspection after DisassemblyNBS004O3
CRANKSHAFT END PLAY
Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with a
dial indicator.
If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crank-
shaft also.
CONNECTING ROD SIDE CLEARANCE
Measure the side clearance between connecting rod and crank-
shaft arm with a feeler gauge.
If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crank-
shaft also.
PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter
Measure the inner diameter of piston pin hole with an inside
micrometer.
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer.
Piston to Piston Pin Oil Clearance
(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)
If the calculated value is out of the standard, replace piston and piston pin assembly. Standard : 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Limit : 0.30 mm (0.012 in)
EMQ0196D
Standard : 0.20 - 0.35 mm (0.0079 - 0.0138 in)
Limit : 0.40 mm (0.016 in)
PBIC0815E
Standard : 21.993 - 22.005 mm (0.8659 - 0.8663 in)
PBIC0116E
Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in)

CYLINDER BLOCK
EM-145
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Revision: 2006 January2006 M35/M45
Piston Skirt Diameter
Measure the outer diameter of piston skirt with a micrometer.
Piston-to-Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter (direction “Y”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter).
If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to EM-135, "HOW
TO SELECT PISTON" .
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 beam, and tighten 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 a micrometer.
If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to EM-
147, "MAIN BEARING OIL CLEARANCE" . Measure point
: Distance from the top 41.0 mm (1.614 in)
Standard
: 95.480 - 95.510 mm (3.7590 - 3.7602 in)
PBIC0125E
Standard : 0.010 - 0.030 mm (0.0004 - 0.0012 in)
Limit : 0.08 mm (0.0031 in)
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 : 59.951 - 59.975 mm (2.3603 - 2.3612 in) dia.

EM-146
[VQ35DE]
CYLINDER BLOCK
Revision: 2006 January2006 M35/M45
CRANKSHAFT PIN JOURNAL DIAMETER
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 EM-146,
"CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT OUT-OF-ROUND AND TAPER
Measure the dimensions at four different points as shown in the
figure on each main journal and pin journal with a 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 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-147, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-146, "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 connect-
ing rod cap, and tighten connecting rod bolts to the specified
torque. Refer to EM-128, "
ASSEMBLY" for the tightening proce-
dure.
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 (Difference 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 (0.002 in)
Limit : 0.10 mm (0.004 in)
SEM346D
PBIC1642E

CYLINDER BLOCK
EM-147
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Revision: 2006 January2006 M35/M45If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer
to EM-136, "
HOW TO SELECT CONNECTING ROD BEARING" .
Method of Using Plastigage
Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.
Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.
Install connecting rod bearings to connecting rod and connecting rod bearing cap, and tighten connecting
rod bolts to the specified torque. Refer to EM-128, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
Remove connecting rod bearing cap 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 OIL CLEARANCE
Method by Calculation
Install main bearings to cylinder block and main bearing caps,
and tighten main bearing cap bolts with main bearing beam to
the specified torque. Refer to EM-128, "
ASSEMBLY" for the
tightening procedure.
Measure the inner diameter of main bearing with a bore gauge.
(Oil clearance) = (Main bearing inner diameter) – (Crankshaft main
journal diameter)
If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diam-
eter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-137,
"HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage
Remove engine oil and dust on crankshaft journal and the surfaces of each bearing completely.
Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.
Install main bearing to cylinder block and main bearing cap, and tighten main bearing bolts with main
bearing beam to the specified torque. Refer to EM-128, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Never rotate crankshaft.Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
(actual clearance)
Limit : 0.070 mm (0.0028 in)
PBIC1149E
Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)
(actual clearance)
Limit : 0.065 mm (0.0026 in)
PBIC1644E

EM-160
[VQ35DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: 2006 January2006 M35/M45
CRANKSHAFT
Unit: mm (in)
*: Total indicator readingMain journal diameter. “Dm” grade StandardGrade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W
Grade No. X
Grade No. Y
Grade No. 4
Grade No. 759.974 - 59.975 (2.3612 - 2.3612)
59.973 - 59.974 (2.3611 - 2.3612)
59.972 - 59.973 (2.3611 - 2.3611)
59.971 - 59.972 (2.3611 - 2.3611)
59.970 - 59.971 (2.3610 - 2.3611)
59.969 - 59.970 (2.3610 - 2.3610)
59.968 - 59.969 (2.3609 - 2.3610)
59.967 - 59.968 (2.3609 - 2.3609)
59.966 - 59.967 (2.3609 - 2.3609)
59.965 - 59.966 (2.3608 - 2.3609)
59.964 - 59.965 (2.3608 - 2.3608)
59.963 - 59.964 (2.3607 - 2.3608)
59.962 - 59.963 (2.3607 - 2.3607)
59.961 - 59.962 (2.3607 - 2.3607)
59.960 - 59.961 (2.3606 - 2.3607)
59.959 - 59.960 (2.3606 - 2.3606)
59.958 - 59.959 (2.3605 - 2.3606)
59.957 - 59.958 (2.3605 - 2.3605)
59.956 - 59.957 (2.3605 - 2.3605)
59.955 - 59.956 (2.3604 - 2.3605)
59.954 - 59.955 (2.3604 - 2.3604)
59.953 - 59.954 (2.3603 - 2.3604)
59.952 - 59.953 (2.3603 - 2.3603)
59.951 - 59.952 (2.3603 - 2.3603)
Pin journal diameter. “Dp” StandardGrade No. 0 51.968 - 51.974 (2.0460 - 2.0462)
Grade No. 1 51.962 - 51.968 (2.0457 - 2.0460)
Grade No. 2 51.956 - 51.962 (2.0455 - 2.0457)
Center distance “r”40.66 - 40.74 (1.6008 - 1.6039)
Taper (Difference between “A” and “B”)
Limit0.002 (0.0001)
Out-of-round (Difference between “X” and “Y”) 0.002 (0.0001)
Crankshaft runout [TIR*]Standard Less than 0.05 (0.002)
Limit 0.10 (0.004)
Crankshaft end playStandard 0.10 - 0.25 (0.0039 - 0.0098)
Limit 0.30 (0.012)
SEM645SBIA0535E

EM-164
[VK45DE]
PRECAUTIONS
Revision: 2006 January2006 M35/M45
Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly.
When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be
used where noted in the step.
Precautions for Inspection, Repair and ReplacementNBS004OA
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationNBS004OB
Use torque wrench to tighten bolts or nuts to specification.
When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
Replace with new gasket, packing, oil seal or O-ring.
Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.
Guide pins are used for several parts alignment. When replacing and reassembling parts with guide pins,
make sure that guide pins are installed in the original position.
Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
Release air within route when refilling after draining engine coolant.
After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Parts Requiring Angle TighteningNBS004OC
Use angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap nuts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)
Do not use a torque value for final tightening.
The torque value for these parts are for a preliminary step.
Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketNBS004OD
REMOVAL OF LIQUID GASKET SEALING
After removing mounting nuts and bolts, separate the mating
surface using seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.
Tap seal cutter to insert it (1), and then slide it (2) by tapping on
the side as shown in the figure.
In areas where seal cutter (SST) is difficult to use, use plastic
hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
PBIC0002E

PREPARATION
EM-167
[VK45DE]
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Revision: 2006 January2006 M35/M45KV10114700
(J–38139)
Main bearing cap removerRemoving crankshaft main bearing cap
KV10107902
(J–38959)
Valve oil seal pullerRemoving valve oil seal
KV10115600
(J–38958)
Valve oil seal driftInstalling valve oil seal
Use side A.
a: 20 (0.79) dia. d: 8 (0.31) dia.
b: 13 (0.51) dia. e: 10.7 (0.421)
c: 10.3 (0.406) dia. f: 5 (0.20)
Unit: mm (in)
EM03470000
(J–8037)
Piston ring compressorInstalling piston assembly into cylinder bore
ST16610001
(J–23907)
Pilot bushing pullerRemoving crankshaft pilot converter
WS39930000
(—)
Tube presserPressing the tube of liquid gasket Tool number
(Kent-Moore No.)
To o l n a m eDescription
ZZA0023D
S-NT011
S-NT603
S-NT044
S-NT045
S-NT052

EM-168
[VK45DE]
PREPARATION
Revision: 2006 January2006 M35/M45
—
(J-45476)
Ring gear stopperRemoving and installing crankshaft pulley
—
(J-45488)
Quick connector releaseRemoving fuel tube quick connectors in
engine room Tool number
(Kent-Moore No.)
Tool nameDescription
PBIC1655E
PBIC0198E