Nissan March K13. Manual - part 288

EM-86

< UNIT DISASSEMBLY AND ASSEMBLY >

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CYLINDER BLOCK

10. Oil ring

11.

Piston pin

12.

Piston

13. Connecting rod

14.

Connecting rod bearing (upper)

15.

Main bearing (upper)

16. Thrust bearing

17.

Crankshaft key

18.

Connecting rod bolt

19. Connecting rod cap

20.

Connecting rod bearing (lower)

21.

Main bearing (lower)

22. Crankshaft

23.

Pilot converter

24.

Rear oil seal

25. Drive plate

26.

Reinforcement plate

27.

Flywheel

A.

Tightening must be done following the 
assembly procedure.
Refer to EM

B.

Chamfered

: Crankshaft side

Refer to 

GI-4, "Components"

 for symbols in the figure.

HOW TO SELECT PISTON AND BEARING

EM-87

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HOW TO SELECT PISTON AND BEARING

Description

INFOID:0000000005988217

• 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.

Connecting Rod Bearing

INFOID:0000000005988218

WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED

1.

Apply connecting rod big end diameter grade stamped (C) on
connecting rod side face to the row in the “Connecting Rod
Bearing Selection Table”.

2.

Apply crankshaft pin journal diameter grade stamped (B) on
crankshaft front side to the column in the “Connecting Rod Bear-
ing 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

1.

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

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.

A

:  Oil  hole

B

: Cylinder number

D

:  Front  mark

PBIC3756E

A

: Main journal diameter grade (No. 1 to 5 from left)

B

: Crankshaft pin journal diameter grade (No. 1 to 4 from left)

PBIC3757E

EM-88

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HOW TO SELECT PISTON AND BEARING

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 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:

PBIC3758E

Connecting Rod Bearing Grade Table

: Refer to 

EM-100, "Connecting Rod Bearing"

.

HOW TO SELECT PISTON AND BEARING

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In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [0.8 - 1.2 mm (0.031 - 0.047 in)].

Main Bearing

INFOID:0000000005988219

HOW TO SELECT MAIN BEARING

When New Cylinder Block and Crankshaft Are Used

1.

“Main Bearing Selection Table” rows correspond to main bearing
housing grade on left side of cylinder block.

• If there is a corrected stamp mark (B) on cylinder block, use it

as a correct reference.

2.

Apply main journal diameter grade stamped on crankshaft front
side to column in the “Main Bearing Selection Table”.

3.

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

4.

Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.
NOTE:
Service part is available as a set of both upper and lower.

When Cylinder Block and Crankshaft Are Reused

1.

Measure the dimensions of the cylinder block main bearing housing inner diameter and crankshaft main
journal diameter individually. Refer to EM.

2.

Apply the measured dimension to the “Main Bearing Selection Table”.

3.

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

4.

Apply the symbol obtained to the “Main Bearing Grade Table” to select main bearing.

Bearing undersize table:

Refer to 

EM-100, "Connecting Rod Bearing"

.

PBIC3263J

A

: Basic stamp mark

: Engine front

PBIC3760E

A

: Main journal diameter grade (No. 1 to 5 from left) 

B

: Crankshaft pin journal diameter grade (No. 1 to 4 from left)

PBIC3757E