HOUSING AS-FLYWHEEL 4232810 - Caterpillar

Illustration 1 g01277243
Typical example
(1) Valve spring Length of the inlet valve spring under test force ... 41.75 mm (1.6437 inch)Test force of the inlet valve spring ... 326.4 N (73.4 lb)Length of the exhaust valve spring under test force ... 41.5 mm (1.6339 inch)Test force of the exhaust valve spring ... 332.5 N (74.7 lb) (2) Valve spring recess (3) Valve guides Inside diameter of valve guide ... 9.000 to 9.022 mm (0.3543 to 0.3552 inch)Outside diameter of the exhaust valve guide ... 13.034 to 13.047 mm (0.5131 to 0.5137 inch)Outside diameter of the inlet valve guide ... 13.034 to 13.047 mm (0.5131 to 0.5137 inch)Interference fit of valve guide in cylinder head ... 0.007 to 0.047 mm (0.0003 to 0.0019 inch)Length of valve guide ... 47.25 to 47.75 mm (1.86023 to 1.87992 inch)Note: When new valve guides are installed, new valves and new valve seat inserts must be installed. The valve guides and the valve seat inserts are supplied as partially finished parts. The unfinished valve guides and unfinished valve seat inserts are installed in the cylinder head. Then, the guides and inserts are cut and reamed in one operation with special tooling. This procedure ensures the concentricity of the valve seat to the valve guide in order to create a seal that is tight. Refer to Disassembly and Assembly for removal and installation procedures. (4) Exhaust valve Diameter of the exhaust valve stem ... 8.938 to 8.960 mm (0.3519 to 0.3528 inch)Clearance of valve in valve guide ... 0.040 to 0.084 mm (0.00157 to 0.00331 inch)Overall length of the exhaust valve ... 128.92 to 129.37 mm (5.075 to 5.093 inch) (5) Inlet valve Diameter of the inlet valve stem ... 8.957 to 8.971 mm (0.35264 to 0.35319 inch)Clearance of valve in valve guide ... 0.029 to 0.065 mm (0.00114 to 0.00256 inch)Overall length of the inlet valve ... 128.92 to 129.37 mm (5.075 to 5.093 inch) (6) Exhaust valve face angle from the vertical axis Valve face angle ... 30 degreesValve seat angle ... 30 degrees (7) Diameter of the exhaust valve head ... 41.51 to 41.75 mm (1.634 to 1.643 inch) (8) Diameter of the head of the inlet valve ... 46.20 to 46.46 mm (1.819 to 1.829 inch) (9) Angle of the inlet valve face from the vertical axis Valve face angle ... 30 degreesValve seat angle ... 30 degreesThe valve lash is the following value when the engine is cold: Inlet valves ... 0.35 mm (0.014 inch)Exhaust valves ... 0.45 mm (0.018 inch)