Nissan Frontier. Manual - part 729

HOW TO SELECT PISTON AND BEARING

EM-105

< UNIT DISASSEMBLY AND ASSEMBLY >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

CAUTION:

There are two main bearing selection tables. One is for odd-numbered journals (No. 1, 3 and 5) and

the other is for even-numbered journals (No. 2 and 4).   Make certain to use the appropriate table.

This is due to differences in the specified clearances. 

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.

Main Bearing Selection Table (No. 1, 3 and 5 journals)

PBIC2201E

EM-106

< UNIT DISASSEMBLY AND ASSEMBLY >

[QR25DE]

HOW TO SELECT PISTON AND BEARING

Main Bearing Selection Table (No. 2 and 4 journals)

Main Bearing Grade Table (All Journals)

Unit: mm (in)

PBIC2202E

Grade number*

Thickness 

Identification color

Remarks

0

1.973 - 1.976 (0.0777 - 0.0778)

Black

Grade and color are the same 
for upper and lower bearings.

1

1.976 - 1.979 (0.0778 - 0.0779)

Brown

2

1.979 - 1.982 (0.0779- 0.0780)

Green

3

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

4

1.985 - 1.988 (0.0781 - 0.0783)

Blue

5

1.988 - 1.991 (0.0783 - 0.0784)

Pink

6

1.991 - 1.994 (0.0784 - 0.0785)

Purple

7

1.994 - 1.997 (0.0785 - 0.0786)

White           

HOW TO SELECT PISTON AND BEARING

EM-107

< UNIT DISASSEMBLY AND ASSEMBLY >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

*: Always check with the Parts Department for the latest parts information.

Undersize Bearing Usage Guide

• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-

size (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 fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)]. 

Bearing undersize table

Unit: mm (in)

01

UPR

1.973 - 1.976 (0.0777 - 0.0778)

Black 

Grade and color are different 
for upper and lower bearings.

LWR

1.976 - 1.979 (0.0778 - 0.0779)

Brown

12

UPR

1.976 - 1.979 (0.0778 - 0.0779)

Brown 

LWR

1.979 - 1.982 (0.0779 - 0.0780)

Green

23

UPR

1.979 - 1.982 (0.0779- 0.0780)

Green 

LWR

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

34

UPR

1.982 - 1.985 (0.0780 - 0.0781)

Yellow

LWR

1.985 - 1.988 (0.0781 - 0.0783)

Blue

45

UPR

1.985 - 1.988 (0.0781 - 0.0783)

Blue

LWR

1.988 - 1.991 (0.0783 - 0.0784)

Pink

56

UPR

1.988 - 1.991 (0.0783 - 0.0784)

Pink 

LWR

1.991 - 1.994 (0.0784 - 0.0785)

Purple

67

UPR

1.991 - 1.994 (0.0784 - 0.0785)

Purple 

LWR

1.994 - 1.997 (0.0785 - 0.0786)

White

Grade number*

Thickness 

Identification color

Remarks

PBIC2200E

Size

Thickness

US 0.25 (0.0098)

2.106 - 2.114 (0.0829 - 0.0832)

EM-108

< SERVICE DATA AND SPECIFICATIONS (SDS) 

[QR25DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Standard and Limit

INFOID:0000000009478082

GENERAL SPECIFICATIONS

DRIVE BELT

EXHAUST MANIFOLD AND THREE WAY CATALYST ASSEMBLY

Unit: mm (in)

SPARK PLUG

*: Always check with the Parts Department for the latest parts information.

CYLINDER HEAD

Unit: mm (in)

Cylinder arrangement

In-line 4

Displacement

cm

3

 (cu in)

2,488 (151.82)

Bore and stroke

mm (in)

89.0 x 100.0 (3.504 x 3.937)

Valve arrangement

DOHC

Firing order

1-3-4-2

Number of piston rings

Compression

2

Oil

1

Compression ratio

9.5

Compression pressure                    
kPa (kg/cm

2

, psi) / 250 rpm

Standard

1,304 (13.3, 189)

Minimum

1,108 (11.3, 161)

Differential limit between cylinders

100 (1.0, 14)

Tension of drive belt

                         Auto adjustment by auto-tensioner

Item

Limit

Surface distortion

0.3 (0.012)

Make

NGK

Standard type*

PLZKAR6A–11

Gap (nominal)

1.1 mm (0.043 in)

Items

Limit

Head surface distortion

                                           0.1 (0.004)

Items

Standard