Oldsmobile Workshop Service and Repair Manuals

Valve Seat: Specifications

Valve Installed Height - All .................................................................................................................................  25.00 mm - 25.50 mm (0.9840"- 1.0040")
Measured From Top of Valve Stem to Top of Camshaft Housing Mounting Surface
Valve Tip Above Spring Retainer ....................................................................................................................  All 1.00 mm - 2.00 mm (0.0394" - 0.0787")

INTAKE

Face ........................................................................................................................................................................................................................  Angle 44°

Seat Angle ........................................................................................................................................................................................................................  45°

Head Diameter ....................................................................................................................................................  36.37 mm - 36.63 mm (1.4318" - 1.4421")
Stem Diameter ................................................................................................................................................  6.990 mm - 6.972 mm (0.27512" - 0.27445")
Overall Length ...................................................................................................................................................................................  109.984 mm (4.3300")
Stem to Guide Clearance ....................................................................................................................................  0.025 mm - 0.069 mm (0.0010" - 0.0027")
Valve Seat Width ....................................................................................................................................................  0.94 mm - 1.90 mm (0.0370" - 0.0748")
Valve Seat Margin ........................................................................................................................................................................  (Min.) 0.25 mm (0.0098")
Valve Face Runout .................................................................................................................................................................................  0.038 mm (0.0015")
Valve Tip to Groove ...........................................................................................................................................  3.023 mm - 3.473 mm (0.1190" - 0.1367")

EXHAUST

Face Angle .....................................................................................................................................................................................................................  44.5°

Seat Angle ........................................................................................................................................................................................................................  45°

Head Diameter

(VIN D, 3) ....................................................................................................................................................  29.88 mm - 30.14 mm (1.1764" - 1.1866")
(VIN A) ........................................................................................................................................................  31.37 mm - 31.63 mm (1.2350" - 1.2453")

Stem Diameter ....................................................................................................................................................  6.959 mm - 6.977 mm (0.2740" - 0.2747")
Overall Length ...................................................................................................................................................................................  109.482 mm (4.3103")
Stem to Guide Clearance ....................................................................................................................................  0.038 mm - 0.081 mm (0.0015" - 0.0032")
Valve Seat Width ..................................................................................................................................................  0.094 mm - 1.90 mm (0.0037" - 0.0748")
Valve Seat Margin ........................................................................................................................................................................  (Min.) 0.25 mm (0.0098")
Valve Face Runout .................................................................................................................................................................................  0.038 mm (0.0015")
Valve Tip to Groove ...........................................................................................................................................  3.023 mm - 3.473 mm (0.1190" - 0.1367")