ENGINE MECHANICAL
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 3A-47
VALVE SEATS
1. Measure exhaust and intake valve seats. Refer to valve seat specifications.
2. If measured values are not as specified repair or replace the valve seats.
e
d
a
b
c
f
50351
g
Exhaust Valve Seat Specifications
a-Valve Recession (Max.): 0.03 mm (.001 in.)
b-Head Surface to Seat: 2.05 -2.25 mm (.080 - .088 in.)
c-Counterbore Inner Diameter: (Measurement Not Available At Time Of Printing)
d-Seat Outer Diameter: 39 mm (1.53 in.)
e-Seat Height: 7.90 mm (.311 in.)
f-Seat Width: 2.00 mm (.078 in.)
g-Seat Angle: 60 Degrees
Intake Valve Seat Specifications
a-Valve Recession (Max.): 0.03 mm (.001 in.)
b-Head Surface to Seat: 2.17 -2.37 mm (.085 - .093 in.)
c-Counterbore Inner Diameter: (Measurement Not Available At Time Of Printing)
d-Seat Outer Diameter: 42 mm (1.653 in.)
e-Seat Height: 7.80 mm (.307 in.)
f-Seat Width: 3.25 mm (.127 in.)
g-Seat Angle: 45 Degrees
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