GASKET 6I2003 - Caterpillar

The cylinder head bolts are two different lengths. The following information provides the proper torque for the cylinder head bolts.
Illustration 1 g00987480
The tightening sequence
Lubricate the threads and the underside of the head bolts with clean engine oil. Tighten the bolts in the sequence that is shown in Illustration1 to the following torque. ... 50 N m (37 lb ft)Tighten the bolts again to the following torque. ... 100 N m (74 lb ft)
Illustration 2 g00905621
Head bolts
The head bolts require an additional torque turn procedure. The numbers (1, 3, 4) are three long cylinder head bolts. All the other bolts are short bolts. The tightening sequence is shown in Illustration 1. Place an index mark on the top of each bolt head. Tighten the short bolts for the additional amount. ... 225 degreesPlace an index mark on the top of each bolt head. Tighten the long bolts for the additional amount. ... 270 degreesThickness of the cylinder head ... 117.95 to 118.05 mm (4.643 to 4.647 inch)Minimum thickness of cylinder head ... 117.20 mm (4.614 inch)The maximum distortion of the cylinder head is given in table 1.
Illustration 3 g00924343
Cylinder head
Table 1
Dimension Maximum Permissible Distortion
Width (A) 0.03 mm (0.0012 inch)
Height (B) 0.05 mm (0.0019 inch)
Diagonal Line (C) 0.05 mm (0.0019 inch)
Width (D) 0.03 mm (0.0018 inch)