Infiniti F50. Manual - part 549

 

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Infiniti F50. Manual - part 549

 

 

CYLINDER BLOCK

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HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used:

Compare the pin diameter grade of the crankshaft front surface with
the values of the selection table of connecting rod bearing. 

NOTE:
There is no grading for connecting rod big end.

When Crankshaft and Connecting Rod are Reused:

1.

Measure the pin outer diameter of the crankshaft. 

2.

Compare the measurement with the values of the selection table of connecting rod bearing.

Selection Table of Connecting Rod Bearing

Unit: mm (in)

NOTE:
(At shipment from the plant) For an engine, all the connecting rod
assemblies are in the same weight class. For service parts, no
weight grades can be selected.

Undersize Bearings Usage Guide

When the specified oil clearance is not obtained with standard size connecting rod bearings, use under-
size (US) bearings.

When using undersize bearings, measure the bearing inner diameters with bearings installed, and grind
the crankshaft pin so that the oil clearance satisfies the standard. 

PBIC0110E

Connecting rod big end inner diameter

55.000 - 55.013 (2.1654 - 2.1659)

          Crankshaft pin outer diameter

Grade (Mark)

—(No grade)

51.968 - 51.974                                   

(2.0460 - 2.0462)

0

Bearing grade No. 0                              
Bearing thickness range: 1.500 - 1.503 (0.00591 - 0.0592)
Color: No color

51.962 - 51.968                                   

(2.0457 - 2.0460)

1

Bearing grade No.1
Bearing thickness range: 1.503 - 1.506 (0.0592 - 0.0593)
Color: Brown

51.956 - 51.962                                   

(2.0455 - 2.0457)

2

Bearing grade No.2
Bearing thickness range: 1.506 - 1.509 (0.0593 - 0.0594)
Color: Green

PBIC0103E

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CYLINDER BLOCK

   Bearing undersize table

Unit: mm (in)

CAUTION:

In grinding the crankshaft pin to use undersize bearings, do not
damage the fillet R (All crankshaft pins).

HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used:

1.

Apply main bearing housing grade on upper rear side between
cylinder block banks to row in main bearing selection table.

2.

Apply journal diameter grade on crankshaft front to column in
main bearing selection table.

3.

Find sign at crossing of row and column in main bearing selection table.

CAUTION:

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

No.1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Do not con-
fuse. 

4.

Apply sign at crossing in above step 3 to main bearing grade table.

NOTE:

Grade list applies to all journals.

Service parts is available as a set of both upper and lower.

When Cylinder Block and Crankshaft are Reused:

1.

Measure inner diameter of cylinder block main bearing housing and outer diameter of crankshaft journal.

2.

Apply measurement in above step 1 to main bearing selection table.

3.

Follow step 3 and later in “When new cylinder block and crankshaft are used”.

Undersize

Thickness

US         0.25 (0.0098)

1.626 - 1.634 (0.0640 - 0.0643)

PBIC0111E

PBIC0108E

PBIC0110E

CYLINDER BLOCK

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Main Bearings Selection Table (No.1 and No.5 journal)

PBIC0112E

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CYLINDER BLOCK

Main Bearings Selection Table (No.2, 3 and 4 journal)

Main Bearings Grade Table (All Journals)

Unit: mm (in)

PBIC0113E

Grade number

Thickness 

Identification color

(UPR/LWR)

Remarks

0

2.483 - 2.486 (0.0978 - 0.0979)

Black

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

1

2.486 - 2.489 (0.0979 - 0.0980)

Brown

2

2.489 - 2.492 (0.0980 - 0.0981)

Green

3

2.492 - 2.495 (0.0981 - 0.0982)

Yellow

4

2.495 - 2.498 (0.0982 - 0.0983)

Blue

5

2.498 - 2.501 (0.0983 - 0.0985)

Pink

6

2.501 - 2.504 (0.0985 - 0.0986)

Purple

7

     2.504 - 2.507 (0.0986 - 0.0987)

                    White            

8

     2.507 - 2.510 (0.0987 - 0.0988)

                     Red

 

 

 

 

 

 

 

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