Chevrolet Workshop Service and Repair Manuals

Rocker Arm Assembly: Specifications

Valve

Valve Installed Height, All ....................................................................................................................................  24.86 - 25.62 mm (0.9787 - 1.0024 inch)
Valve Tip Above Spring Retainer, All ..................................................................................................................  0.602 - 0.820 mm (0.0237 - 0.0323 inch)

Intake Valves 
Valve Face Angle .............................................................................................................................................................................................................  46°

Head Diameter .........................................................................................................................................................  35.0 ± 0.03 mm (1.3987 ± 0.0011 inch)
Stem Diameter .......................................................................................................................................................  5.921 - 5.941 mm (0.2331 - 0.2339 inch)
Overall Length .............................................................................................................................................................................  107.290 mm (4.2272 inch)
Stem to Guide Clearance .......................................................................................................................................  0.025 - 0.069 mm (0.0009 - 0.0025 inch)
Valve Face Runout ..........................................................................................................................................................................  0.038 mm (0.0015 inch)
Valve Tip to the Groove Centerline .................................................................................................................................................  3.420 mm (0.1346 inch)

Exhaust Valves

Valve Face Angle ..........................................................................................................................................................................................................  45.5°

Head Diameter ..................................................................................................................................................  28.870 - 29.130 mm (1.1366 - 1.1469 inch)
Stem Diameter .......................................................................................................................................................  5.908 - 5.928 mm (0.2326 - 0.2334 inch)
Overall Length ...............................................................................................................................................................................  108.17 mm (4.2586 inch)
Stem to Guide Clearance .......................................................................................................................................  0.038 - 0.082 mm (0.0016 - 0.0032 inch)
Valve Face Runout ..........................................................................................................................................................................  0.038 mm (0.0015 inch)
Valve Tip to Groove Centerline .......................................................................................................................................................  3.420 mm (0.1346 inch)