Operation CHARM: Car repair manuals for everyone.

Valve Seat

Valve seat
Refacing angle 15°, 45°, 75°
Contacting angle 45°
Contacting width
Intake 1.0 - 1.4 mm (0.039 - 0.055 inch)
Exhaust 1.2 - 1.6 mm (0.047 - 0.063 inch)