3304 DIRECT INJECTION VEHICULAR ENGINE
WITH SCROLL FUEL SYSTEM
TM 5-3805-258-24-1
SPECIFICATIONS
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
VALVES
7S71 44 Spring for valves (new):
Length under test force . . . . . . . . . . . . . . . . . . . . . . . . 44.86 mm (1.766 in.)
Test force . . . . . . . . . . . . . . . . . . . . . . . . . . . 256.7 t 20 N (57.7 ~ 4.5 lb.)
Use again minimum load at length
under test force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
207 N (46.5 lb.)
Length of spring at valve
open position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.28 mm (1.271 in.)
Use again minimum load at valve
open position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642 N (144.4 lb.)
Free length after test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.1 mm (2.05 in.)
Outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35.20 mm (1.386 in.)
Spring must not be bent more than . . . . . . . . . . 1.83 mm (.072 in.)
Height to top of valve guide . . . . . . . . . . . . . . . . . . . 22.23 mm (.875 in.)
Diameter of valve stem
(new) . . . . . . . . . . . . . . . . . . .
9.441 * 0.008 mm (.3717 * .0003 in.)
Uee again minimum diameter . . . . . . . . . . . . . . . . 9.408 mm (.3704 in.)
Bore in valve guide with guide installed in the head.
Minimum permissible (new) . . . . . . . . . . . . . . . . . . . 9.456 mm (.3723 in.)
Maximum permissible (worn) . . . . . . . . . . . . . . . . 9.581 mm (.3772 in.)
Valve lip thickness:
6N9916 Exhauat Valve
Use again minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.69 mm (.106 in.)
7N572 Intake Valve
Uae again minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.89 mm (.106 in.)
Diameter of valve head:
Exhaust valve . . . . . . . . . . .
48.16 ~ 0.13 mm (1.898 * .005 in.)
Intake valve . . . . . . . . . . . . . .
51.31 * 0.13 mm (2.020 * .005 in.)
Angle of valve face . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 1/4°
Depth of bore in head for valve
seat insert . . . . . . . . . . . . . . . . . .
12.41 * 0.13 mm (.488 * .005 in.)
Diameter of valve aeat insert for exhauat
valve . . . . . . . . . . . . . . . . .
50.889 t 0.013 mm (2.0035 * .0005 in.)
8ore in head for valve seat inserf for exhaust
valve . . . . . . . . . . . . . . . . .
50.813 * 0.013 mm (2.0005 t .0005 in.)
Diameter of valve seat inserf for intake
valve . . . . . . . . . . . . . . . . .
52.032 t 0.013 mm (2.0485 t .0005 in.)
Sore in head for valve seat insert for intake
valve . . . . . . . . . . . . . . . . .
51.956 ~ 0.013 mm (2.0455 ~ .0005 in.)
Angle of face of valve aeat inserf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
(10) Maximum permissible width of valve seat
(intake and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.93 mm (.076 in.)
Minimum permissible width of valve seat
(intake and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l.I4 mm (.o45 in.)
(11) Dimension from top of closed valve to face of head:
Mhimum permissible dimension for
6N9916 Exhaust Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.66 mm (.026 in.)
(12)
Outside diameter of the face of the valve seat insert:
Exhaust seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.02 mm (1.612 in.)
Maximum permissible,
exhauat seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47.29 mm (1.882 in.)
Intake seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49.28 mm (1.940 in.)
Maximum permissible,
intake seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.55 mm (1.990 in.)
Angle to grind seat face of the insert to get a
reduction of maximum seat diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15°
Minimum permissible dimension for
(13)
7N572 Intake Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 mm (.006 in.)
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