C2.2 Engine Caterpillar

Illustration 1	g00903737

(1) Valve spring

Standard free length ... 35.0 mm (1.378 inch)

Service limit ... 33.5 mm (1.319 inch)

Standard test force ... 79 N (17.8 lb)

Service limit ... 68.6 N (15.4 lb)

Length under test force ... 30.4 mm (1.197 inch)

(2) Valve guide seal for the exhaust valve

Identification ... Black garter spring

Label on the black garter spring ... "EX"

(3) Valve guide seal for the inlet valve

Identification ... Silver garter spring

(4) Valve spring recess for the valve spring

Illustration 2	g00903744

(5) Exhaust valve guide

(A) Exhaust valve and valve guide

Clearance between the exhaust valve and the valve guide ... 0.050 to 0.075 mm (0.0020 to 0.0030 inch)

Service limit ... 0.25 mm (0.010 inch)

(6) Inlet valve guide

(A) Inlet valve and valve guide

Clearance between the inlet valve and the valve guide ... 0.030 to 0.060 mm (0.0012 to 0.0024 inch)

Service limit ... 0.2 mm (0.008 inch)

(7) Exhaust valve stem

Diameter of the exhaust valve stem ... 6.940 to 6.950 mm (0.27323 to 0.27362 inch)

Service limit ... 6.84 mm (0.269 inch)

(8) Inlet valve stem

Diameter of the inlet valve stem ... 6.955 to 6.970 mm (0.27382 to 0.27441 inch)

Service limit ... 6.89 mm (0.271 inch)

Illustration 3	g00845823

(B) Thickness of the valve head ... 0.925 to 1.075 mm (0.03642 to 0.04232 inch)

Service limit ... 0.5 mm (0.020 inch)

Illustration 4	g00903773

(C) Valve depth below the cylinder head face

Inlet and exhaust valves ... 0.65 to 0.95 mm (0.0256 to 0.0374 inch)

Service limit ... 1.8 mm (0.071 inch)

Illustration 5	g00903760

(D) Valve seat angle ... 45 degrees

(E) Contact face

Exhaust valve ... 1.94 to 2.16 mm (0.0764 to 0.0850 inch)

Service limit ... 2.5 mm (0.098 inch)

Inlet valve ... 1.50 to 2.00 mm (0.0591 to 0.0790 inch)

Service limit ... 2.5 mm (0.098 inch)