Nissan Frontier. Manual — part 765
SERVICE DATA AND SPECIFICATIONS (SDS)
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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)
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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)
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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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