Nissan Pathfinder (2007 year). Manual - part 245

CYLINDER BLOCK

EM-117

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c.

Then tighten all connecting rod bolts 90

°

 clockwise.

CAUTION:

Always use Tool. Avoid tightening based on visual check
alone.

●

After tightening connecting rod bolts, make sure that crank-
shaft rotates smoothly.

●

Check the connecting rod side clearance. Refer to 

EM-123,

"CONNECTING ROD SIDE CLEARANCE"

 .

19. Install pilot converter (A/T models).

●

With drift of the following outer diameter, press-fit as far as it
will go.

●

Press-fit pilot converter with its chamfer facing crankshaft as
shown. (A/T models)

20. Install knock sensors.

●

Install knock sensor so that connector faces rear of engine.

●

After installing knock sensor, connect harness connector, and
lay it out to rear of engine.

CAUTION:

●

Do not tighten bolts while holding connector.   

●

If any impact by dropping is applied to knock sensor,
replace it with new one.

NOTE:

●

Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor. 

●

Make sure that knock sensor does not interfere with other
parts.

Tool number

: KV10112100 (BT-8653-A)

WBIA0586E

Pilot converter

: Approx. 33 mm (1.30 in)

PBIC2947E

SEM537E

PBIC2948E

EM-118

CYLINDER BLOCK

2007 Pathfinder

21. Assemble in the reverse order of disassembly after this step.

Drive plate (A/T models)

●

Install drive plate and reinforcement plate as shown.

●

Holding ring gear using Tool.

●

Tighten bolts crosswise over several times.

How to Select Piston and Bearing 

EBS00QCB

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 cylin-
der 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-127, "Cylinder Bore Inner Diameter"

 .

Tool number

: KV10117700 (J-44716)

PBIC0910E

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 
diameter 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

CYLINDER BLOCK

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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

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-125, "CONNECTING ROD BIG END DIAME-

TER"

 .

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-129, "CRANKSHAFT PIN JOURNAL DIAME-

TER"

 .

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)

PBIC2950E

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)

EM-120

CYLINDER BLOCK

2007 Pathfinder

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:

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.

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

PBIC1908E

Size

Thickness

US 0.25 (0.0098)

1.626 - 1.634 (0.0640 - 0.0643)

PBIC2949E

PBIC2951E

CYLINDER BLOCK

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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-127, "MAIN BEARING HOUSING INNER DIAMETER"

  and 

EM-128, "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.

Main Bearing Selection Table

WBIA0625E

EM-122

CYLINDER BLOCK

2007 Pathfinder

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 number

Thickness

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 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)

CYLINDER BLOCK

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Inspection After Disassembly

EBS00QCC

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 (0.0039 - 0.0098 in)

Limit

: 0.30 mm (0.0118 in)

PBIC2953E

Standard

: 0.20 - 0.35 mm (0.0079 - 0.0138 in)

Limit

: 0.40 mm (0.0157 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-124

CYLINDER BLOCK

2007 Pathfinder

●

When replacing piston and piston pin assembly, refer to 

EM-118, "HOW TO SELECT PISTON"

 .

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.)

PISTON RING SIDE CLEARANCE

●

Measure side clearance of piston ring and piston ring groove
with feeler gauge.

●

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.

PISTON RING END GAP

●

Make sure that the cylinder bore inner diameter is within the
specification. Refer to 

EM-127, "Cylinder Bore Inner Diameter"

 .

●

Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with feeler gauge.

●

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.

Standard:

Top ring

: 0.045 - 0.080 mm (0.0018 - 0.0031 in)

2nd ring

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Oil ring

: 0.065 - 0.135 mm (0.0026 - 0.0053 in)

Limit:

     Top ring

: 0.11 mm (0.0043 in)

     2nd ring

: 0.10 mm (0.0039 in)

SEM024AA

Standard:

Top ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

2nd ring

: 0.33 - 0.48 mm (0.0130 - 0.0189 in)

Oil ring

: 0.20 - 0.50 mm (0.0079 - 0.0197 in)

Limit:

     Top ring

: 0.56 mm (0.0220 in)

     2nd ring

: 0.68 mm (0.0268 in)

Oil ring

: 0.85 mm (0.0335 in)

PBIC0118E