Mazda Workshop Service and Repair Manuals

Valve Seat: Specifications

Valve Seat Width:

Intake and Exhaust ............................................................................................................................................................  1.5 - 2.0 mm (0.06 - 0.08 inch)

Angle ................................................................................................................................................................................................................................  45°

Runout (T.I.R.) ..................................................................................................................................................................................  0.076 mm (0.003 inch)
Bore Diameter:

Insert Counterbore Diameter ....................................................................................................................................  47.097 mm (1.8542 inch) Maximum

Intake ............................................................................................................................................................................  47.072 mm (1.8542 inch) Maximum
Exhaust .........................................................................................................................................................................  39.730 mm (1.5645 inch) Maximum