C7.1 Marine Propulsion Engine Caterpillar

Cylinder Head Valves

Usage:

C7.1 GJN

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Illustration 1	g06070904

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Table 1
Specification for 349-5993 Cylinder Head As
Item	Qty	Part	Specification Description
1	24	356-9640 Valve Guide	Bore after installation is 6.45 to 6.55 mm (0.254 to 0.258 inch).
2	12	322-4120 Valve Seat Insert	Diameter of inlet valve seat insert is 36.995 to 37.005 mm (1.4565 to 1.4569 inch). Face angle is 29 to 31 degrees.
3	12	343-5964 Valve Seat Insert	Diameter of exhaust valve seat insert is 34.995 to 35.005 mm (1.3778 to 1.3782 inch). Face angle is 44 to 46 degrees.

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Illustration 2	g06070919

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Table 2
Item	Qty	Part	Specification Description
4	12	436-0524 Spring	Length under test force 1 is 21.5 mm (0.85 inch). Test force 1 is 161.5 to 178.5 N (36.3 to 40.1 lb). Length under test force 2 is 31.5 mm (1.24 inch). Test force 2 is 337.9 to 373.5 N (76.0 to 84.0 lb). The free length of the inlet valve spring is 39.83 to 42.37 mm (1.568 to 1.668 inch).
5	12	436-0523 Spring	Length under test force 1 is 22.3 mm (0.88 inch). Test force 1 is 285 to 315 N (64 to 71 lb). Length under test force 2 is 31.5 mm (1.24 inch). Test force 2 is 408.5 to 451.5 N (91.8 to 101.5 lb). The free length of the exhaust valve spring is 50.70 to 54.76 mm (1.996 to 2.156 inch).
6	12	336-5446 Inlet Valve	Stem diameter (A) is 6.970 to 6.985 mm (0.2744 to 0.2750 inch). Valve diameter (C) is 34.85 to 35.15 mm (1.372 to 1.384 inch). Face angle is 30 degrees.
7	12	336-5447 Exhaust Valve	Stem diameter (B) is 6.945 to 6.960 mm (0.2734 to 0.2740 inch). Valve diameter (D) is 32.85 to 33.15 mm (1.293 to 1.305 inch). Face angle is 45 degrees.

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