Nissan Pathfinder. Manual — part 574
SERVICE DATA AND SPECIFICATIONS (SDS)
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*
1
: Cam wear limit
*
2
: Total indicator reading
VALVE LIFTER
Unit: mm (in)
VALVE CLEARANCE
Unit: mm (in)
*: Approximately 80
°C (176°F)
AVAILABLE VALVE LIFTER
Unit: mm (in)
Difference in level between front end
faces of No. 1 camshaft bracket and cyl-
inder head
: – 0.14 to 0.14mm (– 0.0055 to 0.0055 in)
—
SEM671
Items
Standard
Valve lifter outer diameter
33.977 - 33.987 (1.3377 - 1.3381)
Valve lifter bore 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
788U
7.88 (0.3102)
790U
7.90 (0.3110)
792U
7.92 (0.3118)
794U
7.94 (0.3126)
796U
7.96 (0.3134)
798U
7.98 (0.3142)
800U
8.00 (0.3150)
802U
8.02 (0.3157)
804U
8.04 (0.3165)
806U
8.06 (0.3173)
808U
8.08 (0.3181)
810U
8.10 (0.3189)
812U
8.12 (0.3197)
814U
8.14 (0.3205)
816U
8.16 (0.3213)
818U
8.18 (0.3220)
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< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
*: Always check with the Parts Department for the latest parts information.
Cylinder Head
INFOID:0000000009177954
CYLINDER HEAD
Unit: mm (in)
VALVE DIMENSIONS
820U
8.20 (0.3228)
822U
8.22 (0.3236)
824U
8.24 (0.3244)
826U
8.26 (0.3252)
828U
8.28 (0.3260)
830U
8.30 (0.3268)
832U
8.32 (0.3276)
834U
8.34 (0.3283)
836U
8.36 (0.3291)
838U
8.38 (0.3299)
840U
8.40 (0.3307)
Identification (stamped) mark*
Thickness
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 (4.97 - 4.98)
—
Spark plug tube installation height
38.2 +0.9/- 0.5 (1.5 +0.035 / -0.020)
—
PBIC0924E
SERVICE DATA AND SPECIFICATIONS (SDS)
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Unit: mm (in)
Valve Oil Seal
Unit: mm (in)
VALVE GUIDE
Valve head diameter (D)
Intake
36.6 - 36.9 (1.441 - 1.453)
Exhaust
30.2 - 30.5 (1.189 - 1.201)
Valve length (L)
Intake
97.13 (3.8240)
Exhaust
94.67 (3.7272)
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
1.15 - 1.45 (0.0453 - 0.0571)
Exhaust
1.45 - 1.75 (0.0571 - 0.0689)
Valve margin (T) limit
More than 0.5 (0.020)
Valve stem end surface grinding limit
Less than 0.2 (0.008)
SEM188
Items
Standard
Height (H) (without valve spring installed)
14.300 - 14.900 (0.5630 - 0.5870)
WBIA0490E
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< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
VALVE SEAT
Items
Standard
Oversize (Service) [0.2 (0.008)]
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 (0.0031)
Exhaust
0.040 - 0.073 (0.0016 - 0.0029)
0.01 (0.004)
Valve deflection
Intake
—
0.24 (0.0094)
Exhaust
—
0.28 (0.0110)
Projection length (L)
12.6 - 12.8 (0.496 - 0.504)
SEM950E
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