C9 On-highway Engine Caterpillar

Cylinder Head

Usage:

C9 C9S

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Illustration 1	g01367697
Bolt tightening sequence

Note: Lubricate the bolts with clean engine oil prior to assembly.

Use the following procedure in order to tighten the cylinder head bolts:

Tighten bolt (1) through bolt (26) in a numerical sequence.
Tighten the bolts to the following torque. ... 160 ± 15 N·m (118 ± 11 lb ft)

Tighten bolt (1) through bolt (26) again in a numerical sequence.
Tighten the bolts again to the following torque. ... 160 ± 15 N·m (118 ± 11 lb ft)

Place a mark on bolt (1) through bolt (26) . Rotate bolt (1) through bolt (26) in a numerical sequence.
Rotate the bolts in the clockwise direction. ... 90 degrees (1/4 turn)

Loosen bolt (1) through bolt (26) until the washers are loose under the bolt heads.

Tighten bolt (1) through bolt (26) in a numerical sequence.
Tighten the bolts to the following torque. ... 160 ± 15 N·m (118 ± 11 lb ft)

Tighten bolt (1) through bolt (26) again in a numerical sequence.
Tighten the bolts again to the following torque. ... 160 ± 15 N·m (118 ± 11 lb ft)

Place a mark on bolt (1) through bolt (26) . Rotate bolt (1) through bolt (26) in a numerical sequence.
Rotate the bolts in the clockwise direction. ... 90 degrees (1/4 turn)

Tighten bolt (27) through bolt (32) in a numerical sequence.
Tighten the bolts to the following torque. ... 28 ± 7 N·m ( 21 ± 5 lb ft)

Thickness of new cylinder head ... 163.00 ± 0.15 mm (6.417 ± 0.006 inch)

Note: The flatness of the cylinder head should be within 0.15 mm ( 0.006 inch). The flatness should also be a maximum of 0.05 mm ( 0.002 inch) for any 150.00 mm ( 5.906 inch) span.

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