NOTE: GUIDELINE FOR REUSABLE PARTS; VALVES AND VALVE SPRINGS, Forms SEBF8002 and SEBF8034, have the procedure and specifications necessary for checking used valves and valve springs.
(1) 9N5496 Spring for valves (outer):
Length under test force … 1.790 in.(45.47 mm)
Test force … 41.6 ± 4 lb.(185.0 ± 18.0 N)
Use again minimum load at length under test force … 37.3 lb.(166 N)
Length of spring at valve open position … 1.190 in.(30.23 mm)
Use again minimum load at valve open position … 135 lb.(600 N)
Free length after test … 2.038 in.(51.77 mm)
Outside diameter … 1.560 in.(39.62 mm)
Spring must not be bent more than … .071 in.(1.80 mm)
(1) 9N5495 Spring for valves (inner):
Length under test force … 1.672 in.(42.47 mm)
Test force … 20.5 ± 2 lb.(91.2 ± 9.0 N)
Use again minimum load at length under test force … 18.4 lb.(81.9 N)
Length of spring at valve open position … 1.072 in.(27.23 mm)
Use again minimum load at valve open position … 66.3 lb.(295 N)
Free length after test … 1.920 in.(48.77 mm)
Outside diameter … 1.050 in.(26.67 mm)
Spring must not be bent more than … .067 in.(1.70 mm)
(2) Distance from the end of the valve to the valve spring spacer seat … 2.063 ± .015 in.(52.40 ± 0.38 mm)
(3) Diameter of valve stem:
9L7682 Intake Valve … .3725 ± .0005 in.(9.462 ± 0.013 mm)
Use again minimum diameter of the valve stem … .371 in.(9.42 mm)
9N5125 Exhaust Valve (tapered stem):
Head end of valve stem … .3705 ± .0005 in.(9.411 ± 0.013 mm)
Use again minimum diameter of the head end of valve stem … .369 in.(9.37 mm)
Lock end of valve stem … .3715 ± .0005 in.(9.436 ± 0.013 mm)
Use again minimum diameter of the lock end of valve stem … .3704 in.(9.408 mm)
Bore in the valve guides (intake and exhaust) … .3745 ± .0005 in.(9.512 ± 0.013 mm)
Maximum permissible bore in the valve guides (worn):
Measure .75 in. (19.0 mm) deep in valve guide bore from both ends of the valve guide … .3760 in.(9.550 mm)
(4) Angle of valve face:
Intake valve … 30° ± 15′
Exhaust valve … 45° ± 15′
(5) Diameter of valve head (intake valve) … 2.094 ± .005 in.(53.19 ± 0.13 mm)
Diameter of valve head (exhaust valve) … 1.804 ± .005 in.(45.82 ± 0.13 mm)
(6) Thickness of valve lip:
Intake valve … .091 in.(2.31 mm)
Use again minimum valve lip thickness … .070 in.(1.78 mm)
Exhaust valve … .063 in.(1.60 mm)
Use again minimum valve lip thickness … .050 in.(1.27 mm)