GASKET 8L3873 - Caterpillar

Illustration 1 g01618524
Typical exampleLubricate the threads and the underside of the head bolts with clean engine oil. Tighten the bolts in the sequence that is shown in Illustration 1 to the following torque. ... 50 N m (37 lb ft) Tighten the bolts again to the following torque. ... 100 N m (74 lb ft) Tighten the head bolts to the additional amount. ... 225 degreesMinimum thickness of cylinder head ... 94.80 mm (3.7323 inch)
Illustration 2 g01618556
Typical exampleNote: The maximum distortion of the cylinder head is given in table 1.
Table 1
Dimension    Maximum Permissible Distortion    
Width (A)    
0.03 mm (0.0012 inch)    
Length (B)    
0.05 mm (0.0020 inch)    
Diagonal Line (C)    
0.05 mm (0.020 inch)    
Illustration 3 g01618557
Typical example (C) Valve guide bores Inlet and exhaust ... 5.979 to 5.992 mm (0.2354 to 0.2359 inch) (D) Valve depths Inlet ... 0.905 to 1.163 mm (0.0356 to 0.0458 inch) The service limit for the depth of the inlet valve ... 1.41 mm (0.0555 inch) Exhaust ... 0.876 to 1.131 mm (0.0345 to 0.0445 inch) The service limit for the exhaust valve depth ... 1.38 mm (0.0543 inch)