Nissan Xterra. Manual - part 375

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HOW TO SELECT PISTON AND BEARING

Main Bearing Selection Table

Main Bearing Grade Table (All Journals)

WBIA0625E

Grade number

Thickness

Unit: mm (in)

Width

Unit: mm (in)

Identification color

Remarks

HOW TO SELECT PISTON AND BEARING

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Undersize Bearing Usage Guide

• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-

side (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 bearings,

keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)]. 

Bearing undersize table

Unit: mm (in)

0

2.500 - 2.503 (0.0984 - 0.0985)

19.9 - 20.1

 (0.783 - 0.791)

Black

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

1

2.503 - 2.506 (0.0985 - 0.0987)

Brown

2

2.506 - 2.509 (0.0987 - 0.0988)

Green

3

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

4

2.512 - 2.515 (0.0989 - 0.0990)

Blue

5

2.515 - 2.518 (0.0990 - 0.0991)

Pink

6

2.518 - 2.521 (0.0991 - 0.0993)

Purple

7

2.521 - 2.524 (0.0993 - 0.0994)

White

01

UPR

2.503 - 2.506 (0.0985 - 0.0987)

Brown

Grade is different for 
upper and lower bear-
ings.

LWR

2.500 - 2.503 (0.0984 - 0.0985)

Black

12

UPR

2.506 - 2.509 (0.0987 - 0.0988)

Green

LWR

2.503 - 2.506 (0.0985 - 0.0987)

Brown

23

UPR

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

LWR

2.506 - 2.509 (0.0987 - 0.0988)

Green

34

UPR

2.512 - 2.515 (0.0989 - 0.0990)

Blue

LWR

2.509 - 2.512 (0.0988 - 0.0989)

Yellow

45

UPR

2.515 - 2.518 (0.0990 - 0.0991)

Pink

LWR

2.512 - 2.515 (0.0989 - 0.0990)

Blue

56

UPR

2.518 - 2.521 (0.0991 - 0.0993)

Purple

LWR

2.515 - 2.518 (0.0990 - 0.0991)

Pink

67

UPR

2.521 - 2.524 (0.0993 - 0.0994)

White

LWR

2.518 - 2.521 (0.0991 - 0.0993)

Purple

PBIC1908E

Size

Thickness

US 0.25 (0.0098)

2.633 - 2.641 (0.1037 - 0.1040)

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Standard and Limit

INFOID:0000000009484496

GENERAL SPECIFICATIONS

DRIVE BELT

INTAKE MANIFOLD COLLECTOR, INTAKE MANIFOLD AND EXHAUST MANIFOLD

Cylinder arrangement

V-6

Displacement cm

3

(cu in)

3,954 (241.30)

Bore and stroke mm (in)

95.5 

× 92.0 (3.76 × 3.622)

Valve arrangement

DOHC

Firing order

1-2-3-4-5-6

Number of piston rings

Compression

2

Oil

1

Number of main bearings

4

Compression ratio

9.7

Compression pressure                                  
kPa (kg/cm

2

, psi)/300 rpm

Standard

1,275 (13.0, 185)

Minimum

981 (10.0, 142)

Differential limit between cylinders

98 (1.0, 14)

Cylinder number

Valve timing
(Intake valve timing control - “OFF”)

Unit: degree

a

b

c

d

e

f

244

240

−4

64

6

58

SEM713A

PBIC0187E

Tension of drive belts

Auto adjustment by auto-tensioner

SERVICE DATA AND SPECIFICATIONS (SDS)

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Unit: mm (in)

SPARK PLUG

*: Always check with the Parts Department for the latest parts information.

CAMSHAFT AND CAMSHAFT BEARING

Unit: mm (in)

*

1

: Total indicator reading

Valve Seal

Unit: mm (in)

Valve Lifter

Unit: mm (in)

Items

                                Limit

Surface distortion

Intake manifold collector

0.1 (0.004)

Intake manifold

0.1 (0.004)

Exhaust manifold

0.3 (0.012)

Make

NGK

Standard type*

DILFR5A-11

Gap (nominal)

1.1 mm (0.043 in)

Items

Standard

Limit

Camshaft journal oil clearance

No. 1

0.045 - 0.086 (0.0018 - 0.0034)

0.15 (0.0059)

No. 2, 3, 4

0.035 - 0.076 (0.0014 - 0.0030)

Camshaft journal length

No. 1

27.500 - 27.548 (1.0827 - 1.0846)

—

Camshaft bracket inner diameter

No. 1

26.000 - 26.021 (1.0236 - 1.0244)

—

No. 2, 3, 4

23.500 - 23.521 (0.9252 - 0.9260)

—

Camshaft journal diameter

No. 1

25.935 - 25.955 (1.0211 - 1.0218)

—

No. 2, 3, 4

23.445 - 23.465 (0.9230 - 0.9238)

—

Camshaft end play

0.115 - 0.188 (0.0045 - 0.0074)

0.24 (0.0094)

Camshaft cam height (A)

Intake

45.465 - 45.655 (1.7900 - 1.7974)

45.265 (1.7821)

Exhaust

45.075 - 45.265 (1.7746 - 1.7821)

44.875 (1.7667)

Camshaft runout [TIR*

1

]

Less than 0.02 (0.0008)

0.05 (0.002)

Camshaft sprocket runout [TIR*

2

]

—

0.15 (0.0059)

SEM671

Items

Standard

Valve seal installed height (H)

14.3 - 14.9 (0.563 - 0.587)

Items

Standard

Valve lifter outer diameter

33.977 - 33.987 (1.3377 - 1.3381)