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Valve seat

Item
Measurement
Qualification
Standard or New
Service Limit
Valve seat
Width
Intake
0.850−1.150 mm (0.0335−0.0453 in.)
1.60 mm (0.063 in.)
Exhaust
1.250−1.550 mm (0.0492−0.0610 in.)
2.00 mm (0.079 in.)
Stem installed height
Intake
46.1−46.5 mm (1.815−1.831 in.)
46.8 mm (1.843 in.)
Exhaust
46.2−46.6 mm (1.819−1.835 in.)
46.9 mm (1.846 in.)