Pontiac Workshop Service and Repair Manuals

Valve Seat: Specifications

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

Seat Angle .......................................................................................................................................................................................................................   46°

Seat Runout ....................................................................................................................................................................................................................   .05°

Seat Width

Intake  ...............................................................................................................................................................................  1.55mm-1.85mm (.061"-.073")
Exhaust  ............................................................................................................................................................................  1.70mm-2.00mm (.067"-.079")

Stem Clearance   .................................................................................................................................................................  .026mm-.068mm (.0010"-.0027)