Nissan Silvia. Manual — part 243

VALVE GUIDE

NMEM0031S04

Unit: mm (in)

SEM083D

Standard

Service

Valve guide
Outer diameter

Intake

10.023 - 10.034 (0.3946 - 0.3950)

10.223 - 10.234 (0.4025 - 0.4029)

Exhaust

10.023 - 10.034 (0.3946 - 0.3950)

10.223 - 10.234 (0.4025 - 0.4029)

Valve guide
Inner diameter (Finished size)

Intake

6.000 - 6.018 (0.2362 - 0.2369)

Exhaust

7.000 - 7.018 (0.2756 - 0.2763)

Cylinder head valve guide hole
diameter

Intake

9.975 - 9.996 (0.3927 - 0.3935)

10.175 - 10.196 (0.4006 - 0.4014)

Exhaust

10.975 - 10.996 (0.4321 - 0.4329)

11.175 - 11.196 (0.4400 - 0.4408)

Interference fit of valve guide

0.027 - 0.059 (0.0011 - 0.0023)

Standard

Limit

Stem to guide clearance

Intake

0.020 - 0.053 (0.0008 - 0.0021)

0.08 (0.0031)

Exhaust

0.040 - 0.073 (0.0016 - 0.0029)

0.1 (0.004)

Valve deflection limit

0.2 (0.008)

Projection length “L”

14.0 - 14.2 (0.551 - 0.559)

VALVE SHIM CLEARANCE ADJUSTMENT

NMEM0031S06

Unit: mm (in)

SEM095D

Valve shim clearance (cold)
Intake & Exhaust

Less than 0.025 (0.001)

Shim thickness “T

1

”

T

1

±

0.025 (0.001)

GI

MA

LC

EC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SERVICE DATA AND SPECIFICATIONS (SDS)

Valve (Cont’d)

EM-85

AVAILABLE SHIM

NMEM0031S07

AEM236

Thickness mm (in)

Identification mark

2.800 (0.1102)

28
00

2.825 (0.1112)

28
25

2.850 (0.1122)

28
50

2.875 (0.1132)

28
75

2.900 (0.1142)

29
00

2.925 (0.1152)

29
25

2.950 (0.1161)

29
50

2.975 (0.1171)

29
75

3.000 (0.1181)

30
00

3.025 (0.1191)

30
25

3.050 (0.1201)

30
50

3.075 (0.1211)

30
75

3.100 (0.1220)

31
00

3.125 (0.1230)

31
25

3.150 (0.1240)

31
50

3.175 (0.1250)

31
75

3.200 (0.1260)

32
00

SERVICE DATA AND SPECIFICATIONS (SDS)

Valve (Cont’d)

EM-86

VALVE SEAT

NMEM0031S05

Unit: mm (in)

SEM651D

Standard

Service

Cylinder head seat recess diameter (D)

In.

35.000 - 35.016 (1.3780 - 1.3786)

35.500 - 35.516 (1.3976 - 1.3983)

Ex.

31.000 - 31.016 (1.2205 - 1.2211)

31.500 - 31.516 (1.2402 - 1.2408)

Valve seat interference fit

In.

0.064 - 0.096 (0.0025 - 0.0038)

Ex.

0.064 - 0.096 (0.0025 - 0.0038)

Valve seat outer diameter (d)

In.

35.080 - 35.096 (1.3811 - 1.3817)

35.580 - 35.596 (1.4008 - 1.4014)

Ex.

31.080 - 31.096 (1.2236 - 1.2242)

31.580 - 31.596 (1.2433 - 1.2439)

Depth (H)

In.

6.25 (0.2461)

Ex.

6.25 (0.2461)

Height (h)

6.2 - 6.3 (0.244 - 0.248)

5.4 - 5.5 (0.213 - 0.217)

GI

MA

LC

EC

FE

CL

MT

AT

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

SERVICE DATA AND SPECIFICATIONS (SDS)

Valve (Cont’d)

EM-87

VALVE SEAT RESURFACE LIMIT

NMEM0031S08

Unit: mm (in)

AEM343

Depth (L)

42.74 - 43.26 (1.6827 - 1.7031)

Camshaft and Camshaft Bearing

NMEM0032

Unit: mm (in)

Standard

Limit

Camshaft journal to bearing clearance (Except No. 1
intake journal)

0.030 - 0.071 (0.0012 - 0.0071)

0.15 (0.0059)

Camshaft journal to bearing clearance (No. 1 intake jour-
nal)

0.040 - 0.081 (0.0016 - 0.0032)

0.15 (0.0059)

Inner diameter of camshaft bearing (Except No. 1 intake
journal)

28.000 - 28.021 (1.1024 - 1.1032)

—

Inner diameter of camshaft bearing (No. 1 intake journal)

28.010 - 28.031 (1.1028 - 1.1036)

—

Outer diameter of camshaft journal

27.950 - 27.970 (1.1004 - 1.1012)

—

Camshaft runout [TIR*]

Less than 0.02 (0.0008)

0.1 (0.004)

Camshaft sprocket runout [TIR*]

Less than 0.25 (0.0098)

—

Camshaft end play

0.092 - 0.173 (0.0036 - 0.0068)

0.20 (0.0079)

EM671

Cam height “A”

Intake

37.920 - 38.110 (1.4929 - 1.5004)

Exhaust

37.920 - 38.110 (1.4929 - 1.5004)

Wear limit of cam height

0.2 (0.008)

Valve lift

Intake

9.2 (0.362)

Exhaust

9.2 (0.362)

*Total indicator reading

SERVICE DATA AND SPECIFICATIONS (SDS)

Valve (Cont’d)

EM-88