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Pontiac
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1991
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Firebird V6-191 3.1L
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Repair and Diagnosis
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Specifications
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Mechanical Specifications
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Engine
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Cylinder Head Assembly
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Valve Seat
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Valve Seats
Valve Seats
Seat Angle
46°
Seat Runout
0.05 mm (0.002 in.)
Seat Width
Intake
1.25.1.50 mm (0.049-0.059 in.)
Exhaust
1.60-1.90 mm (0.063-0.075 in.)