Nissan Altima L32. Manual - part 641

EM-100

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SERVICE DATA AND SPECIFICATIONS (SDS)

CYLINDER HEAD

Unit: mm. (in)

VALVE

Valve Dimensions

Unit: mm. (in)

Valve Clearance

Unit: mm. (in)

* Approximately 80

°C (176°F)

Available Valve Lifter

Description

Limit

Head surface distortion

0.1 (0.004)

Description

Standard

Spark plug tube installation height 

41.7 (1.642)

PBIC0283E

Valve head diameter (D)

Intake

35.5 - 35.8 (1.398 - 1.409)

Exhaust

30.3 - 30.6 (1.193 - 1.205)

Valve length (L)

Intake

 96.84 (3.8136)

Exhaust

97.9 (3.8553)

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

1.08 (0.0425)

Exhaust

1.38 (0.0543)

SEM188

Cold

Hot*

Intake

 0.24 - 0.32 (0.009 - 0.013)

0.304 - 0.416 (0.012 - 0.016)

Exhaust

0.26 - 0.34 (0.010 - 0.013)

0.308 - 0.432 (0.012 - 0.017)

SERVICE DATA AND SPECIFICATIONS (SDS)

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Valve Spring

Thickness mm. (in)

Identification mark (Stamp)

7.88 (0.310)

788U

7.90 (0.311)

790U

7.92 (0.312)

792U

7.94 (0.313)

794U

7.96 (0.313)

796U

7.98 (0.314)

798U

8.00 (0.315)

800U

8.02 (0.316)

802U

8.04 (0.317)

804U

8.06 (0.317)

806U

8.08 (0.318)

808U

8.10 (0.319)

810U

8.12 (0.320)

812U

8.14 (0.320)

814U

8.16 (0.321)

816U

8.18 (0.322)

818U

8.20 (0.323)

820U

8.22 (0.324)

822U

8.24 (0.324)

824U

8.26 (0.325)

826U

8.28 (0.326)

828U

8.30 (0.327)

830U

8.32 (0.328)

832U

8.34 (0.328)

834U

8.36 (0.329)

836U

8.38 (0.330)

838U

KBIA0119E

Free height standard
mm. (in)

Intake

43.72 - 43.92 (1.7213 - 1.7291)

Exhaust

                45.29 - 45.49 (1.7831 - 1.7909)

Pressure standard
N (kg- lb.) at height mm. (in)

Intake and Exhaust

151 - 175 (15.4 - 17.8, 34 - 39) at 35.30 (1.390)

Out-of-square mm. 

(in)

1.9 (0.0748)

Installation height mm. (in)

Intake

35.30 (1.390)

Exhaust

35.30 (1.390)

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SERVICE DATA AND SPECIFICATIONS (SDS)

Valve Lifter

Unit: mm. (in)

Valve Oil Seal

Unit: mm. (in)

Valve Guide

Unit: mm. (in)

Valve Seat

Installation load N (kg - f, lb. - f)

Intake

151 - 175 (15.4 - 17.8, 34 - 39)

Exhaust

151 - 175 (15.4 - 17.8, 34 - 39)

Height during valve open mm. (in)

Intake

25.30 (0.9961)

Exhaust

26.76 (1.0535)

Load with valve open N (kg-f, lb-f)

Intake

351 - 394 (35.8 - 40.2, 79 - 89)

Exhaust

318 - 362 (32.4 - 36.9, 72 - 81)

Description

                                              Standard

Valve lifter outer diameter

33.977 - 33.987 (1.3377 - 1.3381)

Valve lifter bore inner diameter

34.000 - 34.021 (1.3386 - 1.3394)

Clearance between lifter and lifter guide

0.013 - 0.044 (0.0005 - 0.0017)

Description

                                              Standard

Valve oil seal installation height (A)

12.1 (0.476)

Description

Standard

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)

Standard

Valve guide clearance (Stan-
dard)

Intake

0.020 - 0.053 (0.0008 - 0.0021)

Exhaust

0.030 - 0.063 (0.0012 - 0.0025) 

Valve guide clearance (Limit)

Intake

0.08 (0.003)

Exhaust

0.09 (0.004)

Projection length (L)

Intake

10.1 - 10.3 (0.398 - 0.406)

Exhaust

                               10.0 - 10.4 (0.394 - 0.409)

PBIC0184E

SERVICE DATA AND SPECIFICATIONS (SDS)

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Unit: mm. (in)

*1 Machining data

CAMSHAFT AND CAMSHAFT BEARING

Unit: mm. (in)

Description

Standard

Service

Cylinder head seat recess diameter 
(D)

Intake

36.500 - 36.516 (1.4370 - 1.4376)

 37.000 - 37.016 (1.4567 - 1.4573)

Exhaust

31.500 - 31.516 (1.2402 - 1.2408)

32.000 - 32.016 (1.2598 - 1.2605)

Valve seat interference fit

Intake

0.081 - 0.113 (0.0032 - 0.0044)

Exhaust

0.084 - 0.116 (0.0033 - 0.0046)

Valve seat outer diameter (d)

Intake

36.597 - 36.613 (1.4408 - 1.4415)

37.097 - 37.113 (1.4605 - 1.4611)

Exhaust

31.600 - 31.616 (1.2441 - 1.2447)

32.100 - 32.116 (1.2638 - 1.2644)

Diameter (d1)

Intake

33.5 (1.319)

Exhaust

28.0 (1.102)

Diameter (d2)

Intake

34.8 - 35.3 (1.370 - 1.390)

Exhaust

29.6 - 30.1 (1.165 - 1.185)

Angle (

α1)

Intake

60

°

Exhaust

60

°

Angle (

α2)

Intake

88

° 46' - 90° 14'

Exhaust

88

° 46' - 90° 14'

Angle (

α3)

Intake

120

°

Exhaust

120

°

Contacting width (W)*1

Intake

0.99 - 1.35 (0.0390 - 0.0531)

Exhaust

1.19 - 1.55 (0.0469 - 0.0610)

PBIC2745E

Standard

Camshaft runout [TIR*]

                       Less than 0.04 (0.0016)

SEM671