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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

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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)

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

2 (or no mark)

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)

1.500 - 1.503 (0.0591 - 0.0592)

STD 0

Black

53.962 - 53.968 (2.1245 - 2.1247)

1.503 - 1.506 (0.0592 - 0.0593)

STD 1

Brown

53.956 - 53.962 (2.1242 - 2.1245)

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"

and

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

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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

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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)

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.

2.503 - 2.506 (0.0985 - 0.0987)

Brown

2.506 - 2.509 (0.0987 - 0.0988)

Green

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

2.512 - 2.515 (0.0989 - 0.0990)

Blue

2.515 - 2.518 (0.0990 - 0.0991)

Pink

2.518 - 2.521 (0.0991 - 0.0993)

Purple

2.521 - 2.524 (0.0993 - 0.0994)

White

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

UPR

2.506 - 2.509 (0.0987 - 0.0988)

Green

LWR

2.503 - 2.506 (0.0985 - 0.0987)

Brown

UPR

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

LWR

2.506 - 2.509 (0.0987 - 0.0988)

Green

UPR

2.512 - 2.515 (0.0989 - 0.0990)

Blue

LWR

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

UPR

2.515 - 2.518 (0.0990 - 0.0991)

Pink

LWR

2.512 - 2.515 (0.0989 - 0.0990)

Blue

UPR

2.518 - 2.521 (0.0991 - 0.0993)

Purple

LWR

2.515 - 2.518 (0.0990 - 0.0991)

Pink

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)

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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

(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

Oil

Number of main bearings

Compression ratio

9.7

Compression pressure
kPa (kg/cm

, 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

244

240

−

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)

: 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*

]

Less than 0.02 (0.0008)

0.05 (0.0020)

Camshaft sprocket runout [TIR*

]

—

0.15 (0.0059)

SEM671

Items

Standard

Valve seal installed height (H)

14.3 - 14.9 (0.563 - 0.587)

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SERVICE DATA AND SPECIFICATIONS (SDS)

Unit: mm (in)

Valve Clearance

Unit: mm (in)

*: Approximately 80

C (176

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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