Nissan Pathfinder (2011 year). Manual — part 377
HOW TO SELECT PISTON AND BEARING
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HOW TO SELECT PISTON AND BEARING
How to Select Piston and Bearing
INFOID:0000000006247044
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, follow the applicable procedures.
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-116, "Inspection After Disassembly"
.
2. Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.
Selection points
Selection parts
Selection items
Selection methods
Between cylinder block and
crankshaft
Main bearing
Main 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 and con-
necting rod
Connecting rod bearing
Connecting rod bearing grade
(bearing thickness)
Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer di-
ameter determine connecting
rod bearing selection.
Between cylinder block and pis-
ton
Piston 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 and connecting
rod*
—
—
—
PBIC2949E
PBIC2950E
2011 Pathfinder
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HOW TO SELECT PISTON AND BEARING
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 pis-
ton 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 journal grade (“0”, “1”, or “2”) on front of crankshaft, and
select connecting rod bearing of the same grade.
NOTE:
There is no grading for connecting rod big end diameter.
When Crankshaft and Connecting Rod are Reused
1. Measure the connecting rod big end diameter. Refer to
EM-116, "Inspection After Disassembly"
2. Make sure that the connecting rod big end diameter is within the standard value.
3. Measure the crankshaft pin journal diameter. Refer to
EM-116, "Inspection After Disassembly"
.
4. Determine the grade of crankshaft pin journal grade by corresponding to the measured dimension in
“Crankshaft pin journal diameter” column of “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)
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:
Grade
1
2 (or no mark)
3
Cylinder bore inner diameter
95.500 - 95.510
(3.7598 - 3.7602)
95.510 - 95.520
(3.7602 - 3.7606)
95.520 - 95.530
(3.7606 - 3.7610)
Piston skirt diameter
95.480 - 95.490
(3.7590 - 3.7594)
95.490 - 95.500
(3.7594 - 3.7598)
95.500 - 95.510
(3.7598 - 3.7602)
PBIC2951E
Connecting rod big end diameter
57.000 - 57.013 (2.2441 - 2.2446)
Crankshaft
Connecting rod bearing
Crankshaft pin journal diameter
Grade (Mark)
Dimension (Bearing thickness range)
Bearing grade No.
Color
53.968 - 53.974 (2.1247 - 2.1250)
0
1.500 - 1.503 (0.0591 - 0.0592)
STD 0
Black
53.962 - 53.968 (2.1245 - 2.1247)
1
1.503 - 1.506 (0.0592 - 0.0593)
STD 1
Brown
53.956 - 53.962 (2.1242 - 2.1245)
2
1.506 - 1.509 (0.0593 - 0.0594)
STD 2
Green
2011 Pathfinder
HOW TO SELECT PISTON AND BEARING
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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
EM-116, "Inspection After Disassembly"
EM-116, "Inspection After Disassembly"
.
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)
PBIC2949E
PBIC2951E
2011 Pathfinder
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HOW TO SELECT PISTON AND BEARING
Main Bearing Selection Table
Main Bearing Grade Table (All Journals)
WBIA0625E
Grade number
Thickness
Unit: mm (in)
Width
Unit: mm (in)
Identification color
Remarks
2011 Pathfinder
HOW TO SELECT PISTON AND BEARING
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Undersize Bearing Usage Guide
• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-
side (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 bearings,
keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in)
0
2.500 - 2.503 (0.0984 - 0.0985)
19.9 - 20.1
(0.783 - 0.791)
Black
Grade is the same for
upper and lower bear-
ings.
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
01
UPR
2.503 - 2.506 (0.0985 - 0.0987)
Brown
Grade is different for
upper and lower bear-
ings.
LWR
2.500 - 2.503 (0.0984 - 0.0985)
Black
12
UPR
2.506 - 2.509 (0.0987 - 0.0988)
Green
LWR
2.503 - 2.506 (0.0985 - 0.0987)
Brown
23
UPR
2.509 - 2.512 (0.0988 - 0.0989)
Yellow
LWR
2.506 - 2.509 (0.0987 - 0.0988)
Green
34
UPR
2.512 - 2.515 (0.0989 - 0.0990)
Blue
LWR
2.509 - 2.512 (0.0988 - 0.0989)
Yellow
45
UPR
2.515 - 2.518 (0.0990 - 0.0991)
Pink
LWR
2.512 - 2.515 (0.0989 - 0.0990)
Blue
56
UPR
2.518 - 2.521 (0.0991 - 0.0993)
Purple
LWR
2.515 - 2.518 (0.0990 - 0.0991)
Pink
67
UPR
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)
2011 Pathfinder
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and Limit
INFOID:0000000006247045
GENERAL SPECIFICATIONS
DRIVE BELT
INTAKE MANIFOLD COLLECTOR, INTAKE MANIFOLD AND EXHAUST MANIFOLD
Cylinder arrangement
V-6
Displacement cm
3
(cu in)
3,954 (241.30)
Bore and stroke mm (in)
95.5
×
92.0 (3.76
×
3.622)
Valve arrangement
DOHC
Firing order
1-2-3-4-5-6
Number of piston rings
Compression
2
Oil
1
Number of main bearings
4
Compression ratio
9.7
Compression pressure
kPa (kg/cm
2
, psi)/300 rpm
Standard
1,275 (13.0, 185)
Minimum
981 (10.0, 142)
Differential limit between cylinders
98 (1.0, 14)
Cylinder number
Valve timing
(Intake valve timing control - “OFF”)
Unit: degree
a
b
c
d
e
f
244
240
−
4
64
6
58
SEM713A
PBIC0187E
Tension of drive belts
Auto adjustment by auto tensioner
2011 Pathfinder
SERVICE DATA AND SPECIFICATIONS (SDS)
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Unit: mm (in)
SPARK PLUG
*: Always check with the Parts Department for the latest parts information
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*
1
: Total indicator reading
Valve Seal
Unit: mm (in)
Valve Lifter
Items
Limit
Surface distortion
Intake manifold collector
0.1 (0.004)
Intake manifold
0.1 (0.004)
Exhaust manifold
0.3 (0.012)
Application
United States and Canada
Mexico
Make
NGK
Standard type*
DILFR5A-11
PLFR5A-11
Gap (nominal)
1.1 mm (0.043 in)
Items
Standard
Limit
Camshaft journal oil clearance
No. 1
0.045 - 0.086 (0.0018 - 0.0034)
0.15 (0.0059)
No. 2, 3, 4
0.035 - 0.076 (0.0014 - 0.0030)
Camshaft journal length
No. 1
27.500 - 27.548 (1.0827 - 1.0846)
—
Camshaft bracket inner diameter
No. 1
26.000 - 26.021 (1.0236 - 1.0244)
—
No. 2, 3, 4
23.500 - 23.521 (0.9252 - 0.9260)
—
Camshaft journal diameter
No. 1
25.935 - 25.955 (1.0211 - 1.0218)
—
No. 2, 3, 4
23.445 - 23.465 (0.9230 - 0.9238)
—
Camshaft end play
0.115 - 0.188 (0.0045 - 0.0074)
0.24 (0.0094)
Camshaft cam height (A)
Intake
45.465 - 45.655 (1.7900 - 1.7974)
45.265 (1.7821)
Exhaust
45.075 - 45.265 (1.7746 - 1.7821)
44.875 (1.7667)
Camshaft runout [TIR*
1
]
Less than 0.02 (0.0008)
0.05 (0.0020)
Camshaft sprocket runout [TIR*
2
]
—
0.15 (0.0059)
SEM671
Items
Standard
Valve seal installed height (H)
14.3 - 14.9 (0.563 - 0.587)
2011 Pathfinder
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SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
Valve Clearance
Unit: mm (in)
*: Approximately 80
°
C (176
°
F)
Available Valve Lifter
VQ40DE
Unit: mm (in)
Items
Standard
Valve lifter outer diameter
33.977 - 33.987 (1.3377 - 1.3381)
Valve lifter hole diameter
34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance
0.013 - 0.039 (0.0005 - 0.0015)
Items
Cold
Hot* (reference data)
Intake
0.26 - 0.34 (0.010 - 0.013)
0.304 - 0.416 (0.012 - 0.016)
Exhaust
0.29 - 0.37 (0.011 - 0.015)
0.308 - 0.432 (0.012 - 0.017)
Identification (stamped) mark*
Thickness
Intake
Exhaust
788U
N788
7.88 (0.3102)
790U
N790
7.90 (0.3110)
792U
N792
7.92 (0.3118)
794U
N794
7.94 (0.3126)
796U
N796
7.96 (0.3134)
798U
N798
7.98 (0.3142)
800U
N800
8.00 (0.3150)
802U
N802
8.02 (0.3157)
804U
N804
8.04 (0.3165)
806U
N806
8.06 (0.3173)
808U
N808
8.08 (0.3181)
810U
N810
8.10 (0.3189)
812U
N812
8.12 (0.3197)
814U
N814
8.14 (0.3205)
816U
N816
8.16 (0.3213)
818U
N818
8.18 (0.3220)
820U
N820
8.20 (0.3228)
822U
N822
8.22 (0.3236)
824U
N824
8.24 (0.3244)
826U
N826
8.26 (0.3252)
828U
N828
8.28 (0.3260)
830U
N830
8.30 (0.3268)
832U N832
8.32
(0.3276)
834U
N834
8.34 (0.3283)
836U
N836
8.36 (0.3291)
838U
—
8.38 (0.3299)
2011 Pathfinder
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