(1) 7S7144 Spring for valve:
Length under test force … 1.766 in.(44.86 mm)
Test force … 57.7 ± 2.9 lb.(26.2 ± 1.3 kg)
Free length after test … 2.05 in.(52.0 mm)
Outside diameter … 1.38 in.(35.1 mm)
(2) Height to top of valve guide … .875 in.(22.22 mm)
(3) Diameter of valve stem (new) … .3717 ± .0005 in.(9.441 ± 0.013 mm)
Minimum permissible diameter of valve stem (worn) … .3702 in.(9.403 mm)
Bore in valve guide with guide installed in the head … .3746 ± .0010 in.(9.515 ± 0.025 mm)
Maximum permissible diameter of bore in valve guide (worn) … .3766 in.(9.566 mm)
(4) Minimum permissible thickness of lip for exhaust valve:
5S7232 Valve … .047 in.(1.19 mm)
7S6767 Valve … .057 in.(1.44 mm)
Minimum permissible thickness of lip for intake valve … .057 in.(1.44 mm)
(5) Diameter of valve head:
Exhaust valve … 1.896 ± .005 in.(48.16 ± 0.13 mm)
Intake valve … 2.020 ± .005 in.(51.31 ± 0.13 mm)
(6) Angle of valve face … 291/4°
(7) Depth of bore in head for valve seat insert … .449 ± .002 in.(11.40 ± 0.05 mm)
(8) Diameter of valve seat insert for exhaust valve … 2.0035 ± .0005 in.(50.889 ± 0.013 mm)
Bore in head for valve seat insert for exhaust valve … 2.0005 ± .0005 in.(50.813 ± 0.013 mm)
Diameter of valve seat insert for intake valve … 2.1285 ± .0005 in.(54.064 ± 0.013 mm)
Bore in head for valve seat insert for intake valve … 2.1255 ± .0005 in.(53.988 ± 0.013 mm)
(9) Angle of face of valve seat insert … 30°
(10) Maximum permissible width of valve seat (intake and exhaust) … .076 in.(1.93 mm)
Minimum permissible width of valve seat (intake and exhaust) … .030 in.(0.76 mm)
(11) Dimension from top of closed valve to face of head:
Maximum permissible dimension for 5S7232 Exhaust Valves … .134 in.(3.40 mm)
Minimum permissible dimension for 5S7232 Exhaust Valves … .080 in.(2.03 mm)
Maximum permissible dimension for 7S6767 Exhaust Valve … .157 in.(3.99 mm)
Minimum permissible dimension for 7S6767 Exhaust Valve … .111 in.(2.82 mm)
Maximum permissible dimension for intake valve … .134 in.(3.40 mm)
Minimum permissible dimension for intake valve … .088 in.(2.24 mm)
(12) Outside diameter of the face of the valve seat (insert):
Exhaust seat (new insert) … 1.810 in.(45.97 mm)
Maximum permissible exhaust seat (worn) … 1.860 in.(47.25 mm)
Intake seat (new insert) … 1.934 in.(49.12 mm)
Maximum permissible, intake seat (worn) … 1.984 in.(50.40 mm)
(13) Angle to grind seat face of the insert to get a reduction of maximum seat diameter … 15°