84

SERVICE DATA AND SPECIFICATIONS (S.D.S.)

Inspection and Adjustment (Cont'd)

VALVE

Unit: mm (in)

Valve spring

T (Margin thickness)

SEM188

Free height    mm (in)    46.70(1.8386)

Pressure height    28.5/545.3

mm/N (mm/kg, in/lb) (28.5/55.6, 1.122/122.6)

Assembled height    37.0/161.8

mm/N (mm/kg, in/lb)    (37.0/16.5, 1.457/36.4)

Out of square "S" mm (in)    2.0 (0.079)

MA12

Valve guide

Unit: mm (in)

Valve head diameter "D" Intake

Exhaust

35 (1.38) 30(1.18)

Valve guide

Outer diameter

Standard

Seryice

Valve length "L" Intake

Exhaust

109.4 - 110.0 (4.3071 -4.3307)

108.9-109.5 (4.2874 - 4.3110)

Valve stem diameter "d"

Intake    6.970-6.985(0.2744-0.2750)

Exhaust    ,    6.945-6.960(0.2734 - 0.2740)

Valve seat angle "ot"

Intake

45° 15’ - 45°45’

Exhaust

Valve margin "T" Limit

Valve stem end surface grinding limit

0.5 (0.020) 0.2 (0.008)

11.023- 11.034    11.223- 11.234

(0.4340 - 0.4344)    (0.4418 - 0.4423)

Valve guide

Inner diameter [Finished size]

7.005 - 7.020 (0.2758 - 0.2764)

Cylinder head valve guide 10.960-10.978    11.160-11.178

hole diameter    (0.4315 - 0.4322)    (0.4394 - 0.4401)

Interference fit of valve guide

0.045 -0.074 (0.0018-0.0029)

Standard    Max. tolerance

Stem to guide cie3rance

Intake

Exhaust

0.015-0.045

(0.0006-0.0018)

0.045 - 0.075 (0.0018-0.0030)

0.1 (0.004)

Valve clearance

Intake

Exhaust

(Hot)

0.25 (0.0098) 0.30 (0.0118)

(Cold)

♦0.18 (0.007) *0.25 (0.010)

Valve deflection limit

0.2 (0.008)

* At ambient temperaturę 20°C (68°F). After checking valve clearance while engine is cold, also check it when engine is hot to see if it remains within the specified value. If it does not, readjust it.