Infiniti G35 (V35). Manual - part 500

CYLINDER BLOCK

EM-155

Main Bearing Grade Table (All Journals)

Undersize Bearing Usage Guide

●

When the specified main bearing oil clearance is not obtained with standard size main bearings, use
underside (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 bear-
ings, keep the fillet R [1.5 mm (0.059 in)].

Bearing undersize table

Unit: mm (in)

Grade number

Thickness

Unit: mm (in)

Width

Unit: mm (in)

Identification color

Remarks

2.000 - 2.003 (0.0787 - 0.0789)

19.9 - 20.1

(0.783 - 0.791)

Black

Grade is the same for
upper and lower bear-
ings.

2.003 - 2.006 (0.0789 - 0.0790)

Brown

2.006 - 2.009 (0.0790 - 0.0791)

Green

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

2.012 - 2.015 (0.0792 - 0.0793)

Blue

2.015 - 2.018 (0.0793 - 0.0794)

Pink

2.018 - 2.021 (0.0794 - 0.0796)

Purple

2.021 - 2.024 (0.0796 - 0.0797)

White

UPR

2.003 - 2.006 (0.0789 - 0.0790)

Brown

Grade is different for
upper and lower bear-
ings.

LWR

2.000 - 2.003 (0.0787 - 0.0789)

Black

UPR

2.006 - 2.009 (0.0790 - 0.0791)

Green

LWR

2.003 - 2.006 (0.0789 - 0.0790)

Brown

UPR

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

LWR

2.006 - 2.009 (0.0790 - 0.0791)

Green

UPR

2.012 - 2.015 (0.0792 - 0.0793)

Blue

LWR

2.009 - 2.012 (0.0791 - 0.0792)

Yellow

UPR

2.015 - 2.018 (0.0793 - 0.0794)

Pink

LWR

2.012 - 2.015 (0.0792 - 0.0793)

Blue

UPR

2.018 - 2.021 (0.0794 - 0.0796)

Purple

LWR

2.015 - 2.018 (0.0793 - 0.0794)

Pink

UPR

2.021 - 2.024 (0.0796 - 0.0797)

White

LWR

2.018 - 2.021 (0.0794 - 0.0796)

Purple

PBIC1908E

Size

Thickness

US 0.25 (0.0098)

2.132 - 2.140 (0.0839 - 0.0843)

EM-156

CYLINDER BLOCK

Inspection After Disassembly

NBS002V8

CRANKSHAFT END PLAY

●

Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with
dial gauge.

●

If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crank-
shaft also.

CONNECTING ROD SIDE CLEARANCE

●

Measure the side clearance between connecting rod and crank-
shaft arm with feeler gauge.

●

If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crank-
shaft also.

PISTON TO PISTON PIN OIL CLEARANCE
Piston Pin Hole Diameter

Measure the inner diameter of piston pin hole with inside microme-
ter.

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with micrometer.

Piston to Piston Pin Oil Clearance

(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)

●

If clearance is out of the standard, replace piston and piston pin assembly.

Standard

: 0.10 - 0.25 mm (0.0040 - 0.0098 in)

Limit

: 0.30 mm (0.012 in)

EMQ0196D

Standard

: 0.20 - 0.35 mm (0.0080 - 0.0138 in)

Limit

: 0.40 mm (0.016 in)

PBIC0815E

Standard

: 21.993 - 22.005 mm (0.8659 - 0.8663 in)

PBIC0116E

Standard

: 21.989 - 22.001 mm (0.8657 - 0.8662 in)

PBIC0117E

Standard

: 0.002 - 0.006 mm (0.0001 - 0.0002 in)

CYLINDER BLOCK

EM-157

●

When replacing piston and piston pin assembly, refer to

EM-160, "PISTON TO CYLINDER BORE

CLEARANCE"

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

PISTON RING SIDE CLEARANCE

●

Measure the side clearance of piston ring and piston ring groove
with feeler gauge.

●

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.

PISTON RING END GAP

●

Make sure that cylinder bore inner diameter is within specifica-
tion. Refer to

EM-160, "Cylinder Bore Inner Diameter"

●

Lubricate with new engine oil to piston and piston ring, and then
insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with feeler gauge.

Standard:

M/T models

Top ring

: 0.045 - 0.080 mm (0.0018 - 0.0031 in)

2nd ring

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Oil ring

: 0.065 - 0.135 mm (0.0026 - 0.0053 in)

A/T models

Top ring

: 0.045 - 0.080 mm (0.0018 - 0.0031 in)

2nd ring

: 0.030 - 0.070 mm (0.0012 - 0.0028 in)

Oil ring

: 0.065 - 0.135 mm (0.0026 - 0.0053 in)

Limit:

M/T models

Top ring

: 0.11 mm (0.0043 in)

2nd ring

: 0.10 mm (0.004 in)

Oil ring

: 0.17 mm (0.0067 in)

A/T models

Top ring

: 0.11 mm (0.0043 in)

2nd ring

: 0.10 mm (0.004 in)

Oil ring

: —

SEM024AA

Standard:

M/T models

Top ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

2nd ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

Oil ring

: 0.20 - 0.50 mm (0.008 - 0.020 in)

A/T models

Top ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

2nd ring

: 0.33 - 0.48 mm (0.0130 - 0.0189 in)

Oil ring

: 0.20 - 0.50 mm (0.008 - 0.020 in)

Limit:

M/T models

Top ring

: 0.54 mm (0.0213 in)

PBIC0118E

EM-158

CYLINDER BLOCK

●

If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.

CONNECTING ROD BEND AND TORSION

●

Check with connecting rod aligner.

●

If it exceeds the limit, replace connecting rod assembly.

CONNECTING ROD BIG END DIAMETER

●

Install connecting rod cap without connecting rod bearing
installed, and tightening connecting rod bolts to the specified
torque. Refer to

EM-143, "ASSEMBLY"

for the tightening proce-

dure.

●

Measure the inner diameter of connecting rod big end with
inside micrometer.

●

If out of the standard, replace connecting rod assembly.

2nd ring

: 0.53 mm (0.0209 in)

Oil ring

: 0.85 mm (0.0335 in)

A/T models

Top ring

: 0.54 mm (0.0213 in)

2nd ring

: 0.80 mm (0.0315 in)

Oil ring

: 0.95 mm (0.0374 in)

Bend:

Limit: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length

Torsion:

Limit: 0.30 mm (0.012 in) per 100 mm (3.94 in) length

PBIC2077E

Standard

: 55.000 - 55.013 mm (2.1654 - 2.1659 in)

PBIC1641E

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