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TM5-241O-237-34
3-9. CYLINDER HEAD ASSEMBLY AND SPACER PLATE - REPLACE/REPAIR (Cont'd)
Valve Specifications
Table 3-2.
Ref.
Specification
No.
Description
Valve spring:
1
Test force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58+6
lb.
in.
Length under test force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.756
Free length after test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.05
in.
in.
Outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1.386
Spring MUST not be bent more than . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.072
in.
Valves:
2
Stem diameter (minimum allowable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3704 in.
Lip thickness (minimum allowable):
3
Exhaust valve . . . .. . . .. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 0.106 in.
Intake valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.106 in.
Diameter of valve head:
4
Exhaust valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 0.005 in.
Intake valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . ....... . 0.005 in.
Angle of valve face . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 29-1/4
5
Valve seat insert:
Angle of face . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6
7
Width. .intake and exhaust:
Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.045 in.
Maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.076 in.
8
Face O.D.:
Exhaust seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.812 - 1.862 in.
Intake seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1940 - 1.990 in.
3-34

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