C-10 Petroleum Engine Caterpillar

Illustration 1	g01090693

Note: Coat the inlet valve stems and the exhaust valve stems with 8T-2998 Lubricant prior to installation into the cylinder head.

(1) Inlet valve

(2) Exhaust valve

(3) Height to the step that is in the valve guide ... 22.00 ± 0.50 mm (0.866 ± 0.020 inch)

(4) Outer valve spring

214-0586 Spring

Assembled Length ... 52.95 mm (2.085 inch)

Load at assembled length ... 320 ± 31 N (72 ± 7 lb)

Operating length (minimum) ... 37.40 mm (1.472 inch)

Load at minimum operating length ... 860 ± 34 N (193 ± 8 lb)

Free length after test ... 62.7 mm (2.469 inch)

Outside diameter ... 34.00 mm (1.339 inch)

(5) Inner valve spring

224-4441 Spring

Assembled Length ... 50.47 mm (1.987 inch)

Load at assembled length ... 160 ± 13 N (36 ± 3 lb)

Operating length (minimum) ... 34.92 mm (1.375 inch)

Load at minimum operating length ... 385 ± 18 N (87 ± 4 lb)

Free length after test ... 64.10 mm (2.524 inch)

Outside diameter ... 23.24 mm (0.915 inch)

(6) New valve stem diameter ... 9.441 ± 0.008 mm (0.3717 ± 0.0003 inch)

Specifications for the valve guides

Prior to installation into the cylinder head, the valve guide bore is the following value. ... 9.502 ± 0.013 mm (0.3741 ± 0.0005 inch)

(7) Diameter of valve head

Inlet valve ... 45.00 ± 0.13 mm (1.772 ± 0.005 inch)

Exhaust valve ... 42.00 ± 0.13 mm (1.654 ± 0.005 inch)

(8) Angle of face of valve seat insert

Inlet valve ... 29 3/4 ± 1/4 degrees

Exhaust valve ... 44 3/4 ± 1/4 degrees

Illustration 2	g00282169

(9) Depth of the bore in the cylinder head for the valve seat insert

Inlet ... 15.00 ± 0.05 mm (0.591 ± 0.004 inch)

Exhaust ... 14.10 ± 0.05 mm (0.555 ± 0.004 inch)

Note: Shrink the valve seat inserts by reducing the temperature. Shrinking the valve seat inserts allows placement into the counterbore.

(10) Valve seat insert

Diameter of valve seat insert (inlet valve) ... 46.025 ± 0.013 mm (1.8120 ± 0.0005 inch)

Bore in cylinder head for valve seat insert (inlet valve) ... 45.961 ± 0.013 mm (1.8095 ± 0.0005 inch)

Diameter of valve seat insert (exhaust valve) ... 43.390 ± 0.015 mm (1.7083 ± 0.0006 inch)

Bore in cylinder head for valve seat insert (exhaust valve) ... 43.320 ± 0.025 mm (1.7055 ± 0.0010 inch)

(11) Angle of valve face

Angle of the face of the inlet valve ... 29 1/4 ± 1/4 degrees

Angle of the face of the exhaust valve ... 44 1/4 ± 1/4 degrees

(12) Minimum thickness of the valve lip

Inlet valve ... 2.35 mm (0.099 inch)

Exhaust valve ... 2.03 mm (0.080 inch)

Illustration 3	g00472047

(13) Maximum variation of the valve stem length

Inlet valve to inlet valve ... 0.66 mm (0.026 inch)

Exhaust valve to exhaust valve ... 0.66 mm (0.026 inch)