Grand Prix V6-191 3.1L VIN M SFI (1998)
Valve Seat: Specifications
Valve Face Angle ............................................................................................................................................................................................................. 45°
Seat Angle ........................................................................................................................................................................................................................ 45°
Valve Seat Runout ............................................................................................................................................................................. 0.025 mm (0.001 inch)
Seat Width - Intake ........................................................................................................................................................ 1.55 - 1.80 mm (0.061 - 0.071 inch)
Seat Width - Exhaust ....................................................................................................................................................... 1.70 - 2.0 mm (0.067 - 0.079 inch)
Valve Margin - Minimum Intake ......................................................................................................................................................... 2.10 mm (0.083 inch)
Valve Margin - Minimum Exhaust ...................................................................................................................................................... 2.70 mm (0.106 inch)