Unit: mm (in)

|
Items
| Standard
| Oversize (Service) [0.5 (0.020)]
|
Cylinder head seat recess diameter “D”
| Intake
| 38.000 - 38.016 (1.4961 - 1.4967)
| 38.500 - 38.516 (1.5157 - 1.5164)
|
Exhaust
| 33.000 - 33.016 (1.2992 - 1.2998)
| 33.500 - 33.516 (1.3189 - 1.3195)
|
Valve seat outer diameter “d”
| Intake
| 38.097 - 38.113 (1.4999 - 1.5005)
| 38.597 - 38.613 (1.5196 - 1.5202)
|
Exhaust
| 33.080 - 33.096 (1.3024 - 1.3030)
| 33.580 - 33.596 (1.3220 - 1.3227)
|
Valve seat interference fit
| Intake
| 0.081 - 0.113 (0.0032 - 0.0044)
|
Exhaust
| 0.064 - 0.096 (0.0025 - 0.0038)
|
Diameter “d1”*1
| Intake
| 31.1 - 31.6 (1.224 - 1.244)
|
Exhaust
| 29.52 (1.1622)
|
Diameter “d2”*2
| Intake
| 36.3 - 36.8 (1.429 - 1.449)
|
Exhaust
| 35.0 (1.378)
|
Angle “α1”
| Intake
| 60°
|
Exhaust
| 60°
|
Angle “α2”
| Intake
| 88°45′ - 90°15′
|
Exhaust
| 88°45′ - 90°15′
|
Angle “α3”
| Intake
| 110°
|
Exhaust
| 110°
|
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)
| 4.61 - 4.71 (0.1815 - 0.1854)
|
Exhaust
| 5.9 - 6.0 (0.232 - 0.236)
| 4.26 - 4.36 (0.1677 - 0.1717)
|
Depth “H”
| 6.0 (0.236)
|
*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