Buick Workshop Service and Repair Manuals

Valve: Specifications

Installed Height ......................................................................................................................................................  24.86-25.62 mm (0.9787-1.0024 inch) 

Valve Tip Height Above Spring Retainer ............................................................................................................  0.602-0.820 mm (0.0237-0.0323 inch) 

Valve Seat Angle ................................................................................................................................................................................................  45 degrees 

Valve Face Angle

Intake ..........................................................................................................................................................................................................  46 degrees
Exhaust .....................................................................................................................................................................................................  45.5 degrees

Overall Length

Intake .................................................................................................................................................................................  107.290 mm (4.2272 inch)
Exhaust ................................................................................................................................................................................  108.17 mm (4.2586 inch)

Head Diameter

Intake .............................................................................................................................................................  35.5 ± 0.03 mm (1.3987 ± 0.0011 inch)
Exhaust ........................................................................................................................................................  28.870-29.130 mm (1.1366-1.1469 inch)

Stem Diameter

Intake ...............................................................................................................................................................  5.921 5.941 mm (0.2331-0.2339 inch)
Exhaust ............................................................................................................................................................  5.908-5.928 mm (0.2326-0.2334 inch)

Stem To Guide Clearance

Intake ...............................................................................................................................................................  0.025-0.069 mm (0.0009-0.0025 inch)
Exhaust ............................................................................................................................................................  0.038-0.082 mm (0.0016-0.0032 inch)

Valve Seat Width

Intake ...................................................................................................................................................................  0.94-1.90 mm (0.0370-0.0748 inch)
Exhaust ..............................................................................................................................................................  0.094-1.90 mm (0.0037-0.0748 inch)

Valve Seat Margin (Minimum)

Intake .......................................................................................................................................................................................  0.25 mm (0.0098 inch)
Exhaust ....................................................................................................................................................................................  0.25 mm (0.0098 inch)

Valve Face Runout

Intake .....................................................................................................................................................................................  0.038 mm (0.0015 inch)
Exhaust ..................................................................................................................................................................................  0.038 mm (0.0015 inch)

Valve Tip to the Groove Centerline

Intake .....................................................................................................................................................................................  3.420 mm (0.1346 inch)
Exhaust ..................................................................................................................................................................................  3.420 mm (0.1346 inch)