2007 NISSAN 350Z crankshaft

CYLINDER BLOCK
EM-119
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: 2006 November2007 350Z
How to Select Piston and Bearing NBS00014
DESCRIPTION
*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only “0” grade is available.) The
information at the shipment from the plant is described as a reference.

The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.

For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table.

For details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, refer to the text.
HOW TO SELECT PISTON
When New Cylinder Block is Used
Check the cylinder bore grade (“1”, “2” or “3”) on rear side of cylinder
block, and select piston of the same grade.
NOTE:
Piston is available with piston pin as a set for the service part. (Only
“0” grade piston pin is available.)
When Cylinder Block is Reused
1. Measure the cylinder bore inner diameter. Refer to EM-129, "Cylinder Bore Inner Diameter" .
Selection points Selection parts Selection items Selection methods
Between cylinder block to
crankshaftMain bearingMain bearing grade
(bearing thickness)Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft to connect-
ing rodConnecting rod bearingConnecting rod bearing grade
(bearing thickness)Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer
diameter determine connecting
rod bearing selection.
Between cylinder block to pis-
tonPiston and piston pin assembly
(Piston is available together
with piston pin as assembly.)Piston grade
(piston skirt diameter)Piston grade = cylinder bore
grade (inner diameter of bore)
Between piston to connecting
rod*———
A : Bearing housing grade No. 1
B : Bearing housing grade No. 2
C : Bearing housing grade No. 3
D : Bearing housing grade No. 4
E : Cylinder bore grade No. 1
F : Cylinder bore grade No. 2
G : Cylinder bore grade No. 3
H : Cylinder bore grade No. 4
I : Cylinder bore grade No. 5
J : Cylinder bore grade No. 6
K : Identification code
: Engine front
PBIC4995E

EM-120
CYLINDER BLOCK
Revision: 2006 November2007 350Z
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 assembly.

Piston pin (piston pin hole) 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
1. “Connecting Rod Bearing Selection Table” rows correspond to
connecting rod big end diameter grade (D) stamped on side face
of connecting rod.
2. “Connecting Rod Bearing Selection Table” columns correspond
to pin journal diameter grade (E - J) on front side of crankshafts.
A : Piston grade number
B : Front mark
C : Piston pin grade number
PBIC4994E
Grade 1 2 3
Cylinder bore inner diameter95.500 - 95.510
(3.7598 - 3.7602)95.510 - 95.520
(3.7602 - 3.7606)95.520 - 95.530
(3.7606 - 3.7610)
Piston skirt diameter95.480 - 95.490
(3.7590 - 3.7594)95.490 - 95.500
(3.7594 - 3.7598)95.500 - 95.510
(3.7598 - 3.7602)
A : Sample code
B : Bearing stopper groove
C : Small end diameter grade
D : Big end diameter grade
E : Weight grade
F : Cylinder No.
G : Management code
H : Front mark
I : Management code
A : Main journal diameter grade No. 1
B : Main journal diameter grade No. 2
C : Main journal diameter grade No. 3
D : Main journal diameter grade No. 4
E : Pin diameter grade No. 1
F : Pin diameter grade No. 2
G : Pin diameter grade No. 3
H : Pin diameter grade No. 4
I : Pin diameter grade No. 5
J : Pin diameter grade No. 6
K : Identification code
PBIC5046E
PBIC4996E

CYLINDER BLOCK
EM-121
C
D
E
F
G
H
I
J
K
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MA
EM
Revision: 2006 November2007 350Z
3. Select connecting rod bearing grade at the point where selected row and column meet in “Connecting
Rod Bearing Selection Table”.
When Crankshaft and Connecting Rod are Reused
1. Measure the connecting rod big end diameter and crankshaft pin journal diameter. Refer to EM-127,
"CONNECTING ROD BIG END DIAMETER" . and EM-131, "CRANKSHAFT PIN JOURNAL DIAMETER"
.
2. Correspond the measured dimension in “Connecting rod big end diameter” row of “Connecting Rod Bear-
ing Selection Table”.
3. Correspond the measured dimension in “Crankshaft pin journal diameter” column of “Connecting Rod
Bearing Selection Table”.
4. Select connecting rod bearing grade at the point where selected row and column meet in following selec-
tion table.
Connecting Rod Bearing Selection Table
Connecting Rod Bearing Grade Table
PBIC5023E
Grade number Thickness mm (in) Identification color (mark)
0 1.497 – 1.500 (0.0589 – 0.0591) Black
1 1.500 – 1.503 (0.0591 – 0.0592) Brown

EM-122
CYLINDER BLOCK
Revision: 2006 November2007 350Z
Undersize Bearings Usage Guide

When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.

When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
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.
2 1.503 – 1.506 (0.0592 – 0.0593) Green
3 1.506 – 1.509 (0.0593 – 0.0594) Yellow
4 1.509 – 1.512 (0.0594 – 0.0595) Blue Grade number Thickness mm (in) Identification color (mark)
PBIC1908E
Size Thickness
US 0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643)
A : Bearing housing grade No. 1
B : Bearing housing grade No. 2
C : Bearing housing grade No. 3
D : Bearing housing grade No. 4
E : Cylinder bore grade No. 1
F : Cylinder bore grade No. 2
G : Cylinder bore grade No. 3
H : Cylinder bore grade No. 4
I : Cylinder bore grade No. 5
J : Cylinder bore grade No. 6
K : Identification code
: Engine front
A : Main journal diameter grade No. 1
B : Main journal diameter grade No. 2
C : Main journal diameter grade No. 3
D : Main journal diameter grade No. 4
E : Pin diameter grade No. 1
F : Pin diameter grade No. 2
G : Pin diameter grade No. 3
H : Pin diameter grade No. 4
PBIC4995E
PBIC4996E

CYLINDER BLOCK
EM-123
C
D
E
F
G
H
I
J
K
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MA
EM
Revision: 2006 November2007 350Z3. 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-129, "
MAIN BEARING HOUSING INNER DIAMETER" and EM-130, "CRANKSHAFT MAIN
JOURNAL 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.
Main Bearing Selection Table
I : Pin diameter grade No. 5
J : Pin diameter grade No. 6
K : Identification code
PBIC5024E

EM-124
CYLINDER BLOCK
Revision: 2006 November2007 350Z
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 2.500 - 2.503 (0.0984 - 0.0985)
19.9 - 20.1
(0.783 - 0.791)Black
Grade and color are
the same for upper
and lower bearings. 1 2.503 - 2.506 (0.0985 - 0.0987) Brown
2 2.506 - 2.509 (0.0987 - 0.0988) Green
3 2.509 - 2.512 (0.0988 - 0.0989) Yellow
4 2.512 - 2.515 (0.0989 - 0.0990) Blue
5 2.515 - 2.518 (0.0990 - 0.0991) Pink
6 2.518 - 2.521 (0.0991 - 0.0993) Purple
7 2.521 - 2.524 (0.0993 - 0.0994) White
01UPR 2.503 - 2.506 (0.0985 - 0.0987) Brown
Grade and color are
different for upper and
lower bearings. LWR 2.500 - 2.503 (0.0984 - 0.0985) Black
12UPR 2.506 - 2.509 (0.0987 - 0.0988) Green
LWR 2.503 - 2.506 (0.0985 - 0.0987) Brown
23UPR 2.509 - 2.512 (0.0988 - 0.0989) Yellow
LWR 2.506 - 2.509 (0.0987 - 0.0988) Green
34UPR 2.512 - 2.515 (0.0989 - 0.0990) Blue
LWR 2.509 - 2.512 (0.0988 - 0.0989) Yellow
45UPR 2.515 - 2.518 (0.0990 - 0.0991) Pink
LWR 2.512 - 2.515 (0.0989 - 0.0990) Blue
56UPR 2.518 - 2.521 (0.0991 - 0.0993) Purple
LWR 2.515 - 2.518 (0.0990 - 0.0991) Pink
67UPR 2.521 - 2.524 (0.0993 - 0.0994) White
LWR 2.518 - 2.521 (0.0991 - 0.0993) Purple
PBIC1908E
Size Thickness
US 0.25 (0.0098) 2.633 - 2.641 (0.1037 - 0.1040)

CYLINDER BLOCK
EM-125
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D
E
F
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EM
Revision: 2006 November2007 350Z
Inspection After DisassemblyNBS00015
CRANKSHAFT END PLAY

Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with
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 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 inside microme-
ter.
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with 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 (0.0040 - 0.0098 in)
Limit : 0.30 mm (0.0120 in)
PBIC2953E
Standard : 0.20 - 0.35 mm (0.0080 - 0.0138 in)
Limit : 0.40 mm (0.0160 in)
PBIC2954E
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)

EM-130
CYLINDER BLOCK
Revision: 2006 November2007 350Z
Piston Skirt Diameter
Measure the outer diameter of piston skirt with 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 calculated value exceeds the limit, replace piston and piston pin assembly. Refer to EM-119, "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 lower cylinder block, 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 micrometer.

If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to EM-
132, "MAIN BEARING OIL CLEARANCE" . Measure point
: Distance from the top 38.8 mm (1.528 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 : 64.951 - 64.975 mm (2.5571 - 2.5581 in) dia.