Nissan Frontier. Manual - part 765

 

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Nissan Frontier. Manual - part 765

 

 

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-249

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Valve Clearance

Unit: mm (in)

*: Approximately 80

°C (176°F)

Available Valve Lifter

Unit: mm (in)

Valve lifter hole diameter

34.000 - 34.016 (1.3386 - 1.3392)

Valve lifter clearance

0.013 - 0.039 (0.0005 - 0.0015)

Items

Cold

Hot* (reference data)

Intake

0.26 - 0.34 (0.010 - 0.013)

0.304 - 0.416 (0.012 - 0.016)

Exhaust

0.29 - 0.37 (0.011 - 0.015)

0.308 - 0.432 (0.012 - 0.017)

Identification (stamped) mark*

Thickness

Intake

Exhaust

788U

N788

7.88 (0.3102)

790U

N790

7.90 (0.3110)

792U

N792

7.92 (0.3118)

794U

N794

7.94 (0.3126)

796U

N796

7.96 (0.3134)

798U

N798

7.98 (0.3142)

800U

N800

8.00 (0.3150)

802U

N802

8.02 (0.3157)

804U

N804

8.04 (0.3165)

806U

N806

8.06 (0.3173)

808U

N808

8.08 (0.3181)

810U

N810

8.10 (0.3189)

812U

N812

8.12 (0.3197)

814U

N814

8.14 (0.3205)

816U

N816

8.16 (0.3213)

818U

N818

8.18 (0.3220)

820U

N820

8.20 (0.3228)

822U

N822

8.22 (0.3236)

824U

N824

8.24 (0.3244)

826U

N826

8.26 (0.3252)

828U

N828

8.28 (0.3260)

830U

N830

8.30 (0.3268)

832U N832

8.32 

(0.3276)

834U

N834

8.34 (0.3283)

836U

N836

8.36 (0.3291)

838U

—

8.38 (0.3299)

EM-250

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SERVICE DATA AND SPECIFICATIONS (SDS)

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

CYLINDER HEAD

Unit: mm (in)

Valve Dimensions

Unit: mm (in)

840U

—

8.40 (0.3307)

Identification (stamped) mark*

Thickness

Intake

Exhaust

SEM758G

Items

Standard

Limit

Head surface distortion

Less than 0.03 (0.0012)

0.1 (0.004)

Normal cylinder head height (H)

126.3 - 126.5 (4.972 - 4.980)

—

Cylinder head No. 1 camshaft journal bear-
ing length

27.360 - 27.385 (1.0772 - 1.0781)

—

PBIC0924E

Valve head diameter (D)

Intake

37.0 - 37.3 (1.4567 - 1.4685)

Exhaust

31.2 - 31.5 (1.228 - 1.240)

Valve length (L)

Intake

96.46 (3.7976)

Exhaust

93.99 (3.7004)

SEM188

SERVICE DATA AND SPECIFICATIONS (SDS)

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Valve Guide

Unit: mm (in)

Valve Seat

Unit: mm (in)

Valve stem diameter (d)

Intake

5.965 - 5.980 (0.2348 - 0.2354)

Exhaust

5.955 - 5.970 (0.2344 - 0.2350)

Valve seat angle (

α)

Intake

45

°15′ - 45°45′

Exhaust

Valve margin (T)

Intake

1.1 (0.043)

Exhaust

1.3 (0.051)

Items

Standard

0.2 (0.008) oversize (Service)

Valve guide

Outer diameter

10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)

Inner diameter (Finished size)

6.000 - 6.018 (0.2362 - 0.2369)

Cylinder head valve guide hole diameter

9.975 - 9.996 (0.3927 - 0.3935)

10.175 - 10.196 (0.4006 - 0.4014)

Interference fit of valve guide

0.027 - 0.059 (0.0011 - 0.0023)

Items

Standard

Limit

Valve guide clearance

Intake

0.020 - 0.053 (0.0008 - 0.0021)

0.08 (0.003)

Exhaust

0.030 - 0.063 (0.0012 - 0.0025)

0.09 (0.004)

Projection length “L”

12.6 - 12.8 (0.496 - 0.504)

SEM950E

Items

Standard

Oversize [0.5 (0.020)] (Service)

Cylinder head seat recess diameter (D)

Intake

38.000 - 38.016 (1.4961 - 1.4967)

38.500 - 38.516 (1.5157 - 1.5164)

Exhaust

32.200 - 32.216 (1.2677 - 1.2683)

32.700 - 32.716 (1.2874 - 1.2880)

Valve seat outer diameter (d)

Intake

38.097 - 38.113 (1.4999 - 1.5005)

38.597 - 38.613 (1.5196 - 1.5202)

Exhaust

32.280 - 32.296 (1.2709 - 1.2715)

32.780 - 32.796 (1.2905 - 1.2912)

Valve seat interference fit

Intake

0.081 - 0.113 (0.0032 - 0.0044)

Exhaust

0.064 - 0.096 (0.0025 - 0.0038)

PBIC2745E

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SERVICE DATA AND SPECIFICATIONS (SDS)

*

1

: Diameter made by intersection point of conic angles (

α1) and (α2)

*

2

: Diameter made by intersection point of conic angles (

α2) and (α3)

*3

: Machining data

Valve Spring

Spark Plug Tube

Unit: mm (in)

CYLINDER BLOCK

Unit: mm (in)

Diameter (d1)*

1

Intake

35 (1.38)

Exhaust

28.7 (1.130)

Diameter (d2)*

2

Intake

36.3 - 36.8 (1.429 - 1.449)

Exhaust

30.3 - 30.8 (1.193 - 1.213)

Angle (

α1)

Intake

60

°

Exhaust

60

°

Angle (

α2)

Intake

88

°45′ - 90°15′

Exhaust

88

°45′ - 90°15′

Angle (

α3)

Intake

120

°

Exhaust

120

°

Contacting width (W)*

3

Intake

1.0 - 1.4 (0.039-0.055)

Exhaust

1.2 - 1.6 (0.047-0.063)

Height (h)

Intake

5.9 - 6.0 (0.232 - 0.236)

5.05 - 5.15 (0.1988 - 0.2028)

Exhaust

5.9 - 6.0 (0.232 - 0.236)

4.95 - 5.05 (0.1949 - 0.1988)

Depth (H)

6.0 (0.236)

Free height  mm (in)

47.07 (1.8531)

Pressure  N (kg, lb) at height mm (in)

Installation

166 - 188 (16.9 - 19.2, 37 - 42) at 37.00 (1.4567)

Valve open

373 - 421 (38.0 - 42.9, 84 - 95) at 27.20 (1.0709)

Squareness mm 

(in)

Limit

2.1 

(0.083)

Items

Standard

Spark plug tube press-fit height (H)

37.7 - 39.1 (1.484 - 1.539)

Surface flatness

Standard

Less than 0.03 (0.0012)

Limit

0.1 (0.004)

Main bearing housing inner diameter

Standard

74.993 - 75.017 (2.9525 - 2.9534)

Cylinder bore

Inner diameter

Standard*

Grade No. 1

95.500 - 95.510 (3.7598 - 3.7602)

Grade No. 2

95.510 - 95.520 (3.7602 - 3.7606)

Grade No. 3

95.520 - 95.530 (3.7606 - 3.7610)

PBIC2955E

 

 

 

 

 

 

 

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