Infiniti FX35, FX50 (S51). Manual - part 994

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HOW TO SELECT PISTON AND BEARING

2.

Apply crankshaft pin journal diameter grade stamped on crank-
shaft front side to the column in 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.

WHEN CONNECTING ROD AND CRANKSHAFT ARE REUSED

1.

Measure connecting rod big end diameter and crankshaft pin journal diameter. Refer to 

EM-265, "Inspec-

tion"

.

2.

Correspond the measured dimension in  connecting rod big end diameter row of “CONNECTING ROD
BEARING SELECTION TABLE”.

3.

Correspond the measured dimension in crankshaft pin journal diameter column of “CONNECTING ROD
BEARING SELECTION TABLE”.

4.

Follow from step 3 in “WHEN NEW CONNECTING ROD AND CRANKSHAFT ARE USED”.

CONNECTING ROD BEARING SELECTION TABLE

A

: Pin diameter grade No. 1

B

: Pin diameter grade No. 2

C

: Pin diameter grade No. 3

D

: Pin diameter grade No. 4

E

: Journal diameter grade No. 1

F

: Journal diameter grade No. 2

G

: Journal diameter grade No. 3

H

: Journal diameter grade No. 4

I

: Journal diameter grade No. 5

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HOW TO SELECT PISTON AND BEARING

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CONNECTING ROD BEARING GRADE TABLE

UNDERSIZE BEARING 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:

In grinding crankshaft pin to use undersize bearings, keep the
fillet R (A) [1.5 - 1.7 mm (0.059 - 0.067 in)].

Main Bearing

INFOID:0000000005245265

WHEN NEW CYLINDER BLOCK AND CRANKSHAFT ARE USED

1.

“MAIN BEARING SELECTION TABLE” rows correspond to
bearing housing grade on rear side of cylinder block.

2.

“MAIN BEARING SELECTION TABLE” columns correspond to
journal diameter grade on front side of crankshaft.

Connecting rod bearing grade table

: Refer to 

EM-292, "Connecting Rod Bearing"

.

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Bearing undersize table

: Refer to 

EM-292, "Connecting Rod Bearing"

.

A

: Bearing housing grade No. 1

B

: Bearing housing grade No. 2

C

: Bearing housing grade No. 3

D

: Bearing housing grade No. 4

E

: Bearing housing grade No. 5

F

: Cylinder bore grade No. 1

G

: Cylinder bore grade No. 2

H

: Cylinder bore grade No. 3

I

: Cylinder bore grade No. 4

J

: Cylinder bore grade No. 5

K

: Cylinder bore grade No. 6

L

: Cylinder bore grade No. 7

M

: Cylinder bore grade No. 8

: Engine front

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A

: Pin diameter grade No. 1

B

: Pin diameter grade No. 2

C

: Pin diameter grade No. 3

D

: Pin diameter grade No. 4

E

: Journal diameter grade No. 1

F

: Journal diameter grade No. 2

G

: Journal diameter grade No. 3

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EM-278

< UNIT DISASSEMBLY AND ASSEMBLY >

[VK50VE]

HOW TO SELECT PISTON AND BEARING

3.

Select main bearing grade at the point where selected row and column meet in “MAIN BEARING SELEC-
TION TABLE”.

CAUTION:

• Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection

table for each part. 

• No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Never con-

fuse.

4.

Apply sign at crossing in above step 3 to “MAIN BEARING GRADE TABLE”.
NOTE:
• “MAIN BEARING GRADE TABLE” applies to all journals.
• Service parts are available as a set of both upper and lower.

WHEN CYLINDER BLOCK AND CRANKSHAFT ARE REUSED

1.

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

EM-265, "Inspection"

.

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.

Follow from step 3 in “When New Cylinder Block and Crankshaft are Used”.

H

: Journal diameter grade No. 4

I

: Journal diameter grade No. 5

HOW TO SELECT PISTON AND BEARING

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MAIN BEARING SELECTION TABLE (No. 1 and 5 Journal)

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