Pontiac Workshop Service and Repair Manuals

Valve Seat: Specifications

Seat Width

Intake

.047-.059 in 

Note:  Seat insert depression: standard, .027 inch;

maximum, .055 inch.

Exhaust .047-.059 in 

Note:  Seat insert depression: standard, .027 inch;

maximum, .055 inch.

Seat Angle

Intake

45 deg 

Exhaust 45 deg 

Run Out

Intake

0.0002 in 

Exhaust 0.0002 in