Nissan X-Trail 32. Manual - part 1092

HOW TO SELECT PISTON AND BEARING

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HOW TO SELECT PISTON AND BEARING

Description

INFOID:0000000010783825

 *For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only grade “0” 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.

Piston

INFOID:0000000010783826

WHEN NEW CYLINDER BLOCK IS USED

• Check the cylinder bore grade on rear left side of cylinder block,

and select piston of the same grade.

• If there is a corrected stamp mark on the cylinder block, use it as a correct reference.

WHEN CYLINDER BLOCK IS REUSED

1.

Measure the cylinder bore inner diameter. Refer to 

EM-256, "Inspection"

.

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 an assembly.)

Piston grade (piston outer diam-
eter)

Piston grade = cylinder bore 
grade (inner diameter of bore)

Between piston and connecting 

rod

*

—

—

—

: Corrected stamping position

: Basic stamping position

: No.1 - 4 from left

: Cylinder bore grade

: No.1 - 5 from left

: Main bearing housing grade

: Engine front

JSBIA2542ZZ

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HOW TO SELECT PISTON AND BEARING

3.

Select piston of the same grade.

PISTON SELECTION TABLE

Unit: mm (in)

NOTE:
• There is no piston grade “1”.
• Piston is available together with piston pin as an assembly. 
• The piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no

grades can be selected. (Only grade “0” is available.)

Connecting Rod Bearing

INFOID:0000000010783827

WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED

1.

Apply connecting rod big end diameter grade stamped on con-
necting rod side face to the row in the “Connecting Rod Bearing
Selection Table”.

2.

Apply crankshaft pin journal diameter grade stamped on crank-
shaft front side to the column in the “Connecting Rod Bearing
Selection Table”.

3.

Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.

4.

Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.

WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED

: Front mark

: Piston pin bore grade number 

: Piston grade identification stamp number

: Piston upper surface identification code stamp

: Identification code

AWBIA1373ZZ

Grade number (Mark)

2

3

Cylinder bore Inner diameter

89.010 - 89.020 (3.5043 - 3.5047)

89.020 - 89.030 (3.5047 - 3.5051)

Piston skirt diameter

88.990 - 89.000 (3.5035 - 3.5039)

89.000 - 89.010 (3.5039 - 3.5043)

: Oil splash

: Small end diameter grade

: Management code

: Bearing stopper groove

: Management code

: Cylinder number

: Big end diameter grade

JSBIA2507ZZ

: Key

: Main jounal diameter grade (No.1 - 5 from left)

: Pin jounal diameter grade (No.1 - 4 from left)

JSBIA2543ZZ

HOW TO SELECT PISTON AND BEARING

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1.

Measure the dimensions of the connecting rod big end diameter and crankshaft pin journal diameter indi-
vidually. Refer to 

EM-256, "Inspection"

.

2.

Apply the measured dimension to the “Connecting Rod Bearing Selection Table”.

3.

Read the symbol at the cross point of selected row and column in the “Connecting Rod Bearing Selection
Table”.

4.

Apply the symbol obtained to the “Connecting Rod Bearing Grade Table” to select connecting rod bearing.

Connecting Rod Bearing Grade Table

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 the 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)] 

.

Connecting Rod Bearing Grade Table

: Refer to 

EM-284, "Connecting Rod Bearing"

.

Bearing undersize table:

Refer to 

EM-284, "Connecting Rod Bearing"

.

PBIC3263J

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HOW TO SELECT PISTON AND BEARING

CONNECTING ROD BEARING SELECTION TABLE

CONNECTING ROD BEARING GRADE TABLE

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 the 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)] 

.

JPBIA0797GB

Connecting rod bearing grade table

: Refer to 

EM-284, "Connecting Rod Bearing"

.

Bearing undersize table:

Refer to 

EM-284, "Connecting Rod Bearing"

.

PBIC3263J