Nissan Frontier. Manual - part 763

ENGINE UNIT

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• 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-219, "Exploded View"

.

INSTALLATION (M/T models)

1. Installation is in the reverse order of removal after the following.

• Be sure the dowel pin is installed in the crankshaft.

• When installing the flywheel (3) to the crankshaft (2), be sure

to correctly align crankshaft side dowel pin (1) to the flywheel

side dowel pin hole (A) as shown.

- Oil seal (4)

• There is a locator mark (B) on the clutch cover side of the fly-

wheel (4). Refer to this for ease of installation.

- Crankshaft dowel pin (1)

- Oil seal (2)

- Crankshaft (3)

- Flywheel (4)

- Dowel pin hole (A)

- Dowel pin locator mark (B)

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

EM-220, "Disassembly and

Assembly"

.

ALBIA0522ZZ

PBIC0910E

AWBIA0539ZZ

AWBIA0540ZZ

EM-242

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HOW TO SELECT PISTON AND BEARING

HOW TO SELECT PISTON AND BEARING

How to Select Piston and Bearing

INFOID:0000000009478152

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-230, "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

HOW TO SELECT PISTON AND BEARING

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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-230, "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-230, "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

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HOW TO SELECT PISTON AND BEARING

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-230, "Inspection After Disassembly"

 and 

EM-230, "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