3176C and 3196 Engines for Caterpillar Built Machines Caterpillar

Illustration 1	g01323412
(1) Inlet valve (2) Exhaust valve

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

(3) 214-0586 Spring

Length under test force ... 52.95 mm (2.085 inch)

Test force ... 320 ± 31 N (72 ± 7 lb)

Free length after test ... 62.7 mm (2.47 inch)

Outside diameter ... 34.0 mm (1.34 inch)

(4) 224-4441 Spring

Length under test force ... 50.47 mm (1.987 inch)

Test force ... 160 ± 13 N (36 ± 2.9 lb)

Free length after test ... 64.1 mm (2.52 inch)

Outside diameter ... 23.24 mm (0.915 inch)

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

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

Bore in valve guide after installation of valve guide into cylinder head assembly ... 9.484 ± 0.026 mm (0.3734 ± 0.0010 inch)

The valve guide can be reused. The valve guide bore must not be larger than the following value. ... 9.538 mm (0.3755 inch)

The valves can be reused if the minimum dimensions for the valve stems are met.

Inlet ... 9.408 mm (0.3704 inch)

Exhaust ... 9.408 mm (0.3704 inch)

(C) 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)

(D) Angle of face of valve seat insert

Inlet valve ... 29.75 ± 0.25 degrees

Exhaust valve ... 44.75 ± 0.25 degrees

Illustration 2	g01323455

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

Inlet ... 15.00 ± 0.05 mm (0.591 ± 0.002 inch)

Exhaust ... 14.10 ± 0.05 mm (0.555 ± 0.002 inch)

(F) Angle of valve face

Angle of the face of the inlet valve ... 60.75 ± 0.25 degrees

Angle of the face of the exhaust valve ... 45.75 ± 0.25 degrees

(G) 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)

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

(H) Minimum thickness of the valve lip

Inlet valve ... 2.35 mm (0.093 inch)

Exhaust valve ... 2.03 mm (0.080 inch)

Illustration 3	g01323473

(J) 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)