Nissan Pathfinder (2010 year). Manual - part 374

EM-120

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ENGINE UNIT

• When lower cylinder block is removed after being tightened to the

specified torque with main bearings installed, the tip end of bearing

must protrude. Refer to 

EM-102, "Disassembly and Assembly"

 for

the tightening procedure.

• If the standard is not met, replace main bearings.

CRUSH HEIGHT OF CONNECTING ROD BEARING

• 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-102, "Disassembly

and Assembly"

 for the tightening procedure.

• If the standard is not met, replace connecting rod bearings.

LOWER CYLINDER BLOCK BOLT OUTER DIAMETER

• Measure the outer diameters [(d

1)

, (d

2)]

 at two positions as shown.

• If reduction appears in (A) range, regard it as (d

2)

.

• If it exceeds the limit (large difference in dimensions), replace

lower cylinder block bolt with new one.

CONNECTING ROD BOLT OUTER DIAMETER

• Measure the outer diameter (d) at position shown.

• If the reduction appears in a position other than (d), regard it as (d).

• When (d) exceeds the limit (when it becomes thinner), replace

connecting rod bolt with new one.

DRIVE PLATE 

Standard

: There must be crush height.

SEM502G

Standard

: There must be crush height.

PBIC1646E

Limit [(d

1) - (

d

2

)]

: 0.11 mm (0.0051 in)

PBIC0911E

Limit

: 7.75 mm (0.3051 in)

PBIC0912E

2010 Pathfinder

ENGINE UNIT

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• Check drive plate and signal plate for deformation or cracks.

CAUTION:

• Do not disassemble drive plate.

• Do not place drive plate with signal plate facing down.

• When handling signal plate, take care not to damage or

scratch it. 

• Handle signal plate in a manner that prevents it from becom-

ing magnetized.

• If anything is found, replace drive plate.

OIL JET

• Check nozzle for deformation and damage.

• Blow compressed air from nozzle, and check for clogs.

• If it is not satisfied, clean or replace oil jet.

OIL JET RELIEF VALVE

• Using clean plastic stick, press check valve in oil jet relief valve.

Make sure that valve moves smoothly with proper reaction force.

• If it is not satisfied, replace oil jet relief valve.

Dowel Pin Alignment

INFOID:0000000005260478

REMOVAL

1. Use suitable tool to lock the drive plate and match mark (A) the

drive plate before removing the drive plate bolts.

CAUTION:

Do not damage the ring gear teeth, or the signal plate teeth

behind the ring gear.

2. Remove drive plate.

• Loosen the drive plate bolts in a diagonal order.

CAUTION:

• Never place drive plate with signal plate facing down.

• When handling the signal plate, take care not to damage

or scratch it.

• Handle the signal plate in a manner that prevents it from

becoming magnetized

INSTALLATION 

1. Installation is in the reverse order of removal.

PBIC2938E

EMU0468D

ALBIA0522ZZ

SEM760G

2010 Pathfinder

EM-122

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ENGINE UNIT

• When installing the drive plate to the crankshaft, use the

match mark (A) as shown to correctly align the crankshaft side

dowel pin to the drive plate side dowel pin hole.

• Install the drive plate and the reinforcement plate in the direc-

tion as shown.

• Tighten the drive plate bolts in a diagonal pattern in two steps. Refer to 

EM-102, "Disassembly and

Assembly"

.

ALBIA0522ZZ

PBIC0910E

2010 Pathfinder

HOW TO SELECT PISTON AND BEARING

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HOW TO SELECT PISTON AND BEARING

How to Select Piston and Bearing

INFOID:0000000005260479

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-112, "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

2010 Pathfinder

EM-124

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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-112, "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-112, "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

2010 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

to 

EM-112, "Inspection After Disassembly"

 and 

EM-112, "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

2010 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

2010 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)

2010 Pathfinder