Valve seat

Item
Measurement
Qualification
Standard or New
Service Limit
Valve seat
Width
Intake
0.85−1.15 mm (0.033−0.045 in.)
1.6 mm (0.06 in.)
Exhaust
1.25−1.55 mm (0.049−0.061 in.)
2.0 mm (0.08 in.)
Stem installed height
Intake
67.2−67.4 mm (2.646−2.654 in.)
67.7 mm (2.665 in.)
Exhaust
58.4−58.6 mm (2.299−2.307 in.)
58.9 mm (2.319 in.)