Infiniti G35 (V35). Manual - part 499

CYLINDER BLOCK

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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-160, "Cylinder Bore Inner Diameter"

 .

2.

Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.

NOTE:
Figure shows the piston A/T models. The front marks of M/T
models are 2 punched.

3.

Select piston of the same grade.

Piston Selection Table

Unit: mm (in)

NOTE:

●

Piston is available together with piston pin as assembly.

●

The 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 diameter 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.

SEM756G

PBIC0812E

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)

SEM452G

EM-152

CYLINDER BLOCK

When Crankshaft and Connecting Rod are Reused

1.

Measure the connecting rod big end diameter. Refer to 

EM-158, "CONNECTING ROD BIG END DIAME-

TER"

 .

2.

Make sure the connecting rod big end diameter is within the standard value.

3.

Measure the crankshaft pin journal diameter. Refer to 

EM-162, "CRANKSHAFT PIN JOURNAL DIAME-

TER"

 .

4.

Determine the grade of crankshaft pin journal diameter grade by corresponding to the measured dimen-
sion 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 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 mm (0.059 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.

Connecting rod big end diameter

55.000 - 55.013 (2.1654 - 2.1659)

Crankshaft pin journal diameter

Grade (Mark)

Dimension (Bearing thickness range)

Bearing grade No.

Color

51.968 - 51.974 (2.0460 - 2.0462)

0

1.500 - 1.503 (0.0591 - 0.0592)

STD 0

Black

51.962 - 51.968 (2.0457 - 2.0460)

1

1.503 - 1.506 (0.0592 - 0.0593)

STD 1

Brown

51.956 - 51.962 (2.0455 - 2.0457)

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)

SEM756G

CYLINDER BLOCK

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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 the cylinder block main bearing housing inner diameter and crankshaft main journal diameter.
Refer to 

EM-160, "MAIN BEARING HOUSING INNER DIAMETER"

  and 

EM-162, "CRANKSHAFT MAIN

JOURNAL 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 the following selection
table.

SEM452G

EM-154

CYLINDER BLOCK

Main Bearing Selection Table

PBIC1981E