Usage:
(1) 9L9190 Spring (outer):
Length under test force ... 1.715 in.(43.56 mm)
Test force ... 35 ± 5 lb.(15.9 ± 2.3 kg)
Free length after test ... 1.855 in.(47.12 mm)
Outside diameter ... 1.440 in.(36.58 mm)
(2) 9L9172 Spring (inner):
Length under test force ... 1.715 in.(43.56 mm)
Test force ... 16.5 ± 4 lb.(7.4 ± 1.8 kg)
Free length after test ... 1.85 ± .02 in.(47.1 ± 0.5 mm)
Outside diameter ... .998 ± .012 in.(25.35 ± 0.30 mm)
(3) Diameter of valve stem:
Intake valve ... .3725 ± .0005 in.(9.462 ± 0.013 mm)
Minimum permissible diameter of the valve stem (worn) ... .3710 in.(9.423 mm)
9L8377 Exhaust Valve ... .3715 ± .0005 in.(9.436 ± 0.013 mm)
Minimum permissible diameter of the valve stem (worn) ... .3700 in.(9.398 mm)
9L9244 and 9L7683 Exhaust valve (tapered stem):
Head end of valve stem ... .3705 ± .0005 in.(9.411 ± 0.013 mm)
Lock end of valve stem ... .3715 ± .0005 in.(9.436 ± 0.013 mm)
Minimum permissible diameter of the valve stem (worn) ... .3690 in.(9.373 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) Thickness of valve lip:
Intake valve ... .091 in.(2.31 mm)
Minimum permissible valve lip ... .076 in.(1.93 mm)
Exhaust valve ... .063 in.(1.60 mm)
Minimum permissible valve lip ... .048 in.(1.22 mm)
(5) Angle of valve face:
Intake valve ... 30° ± 15'
Exhaust valve ... 45° ± 15'
(6) 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)