C7 On-highway Engine Caterpillar

Illustration 1	g01523894
Top view of engine

Use the following procedure to tighten the cylinder head bolts:

1. Tighten the bolt 1 through bolt 14 in a numerical sequence to 300 ± 15 N·m (220 ± 11 lb ft).

2. Loosen the bolt 1 through the bolt 14 to 0 N·m (0 lb ft).

3. Tighten the bolt 1 through bolt 14 in a numerical sequence to 130 ± 15 N·m (95 ± 11 lb ft).

4. Again, tighten the bolt 1 through bolt 14 in a numerical sequence to 130 ± 15 N·m (95 ± 11 lb ft).

5. Turn the bolt 1 through bolt 14 in a numerical sequence to an additional angle of 90 degrees (1/4 turn).

Note: Before assembly, lubricate the threads and the bearing surfaces of the bolt 15 through bolt 20 with 4C-5592 Anti-Seize Compound .

6. Tighten bolt 15 through bolt 20 in a numerical sequence to 55 ± 7 N·m (41 ± 5 lb ft).

Note: Before assembly, apply 6V-6640 Sealant to the bore of six cup plugs.

(C) Installation depth of six cup plugs ... 1.25 ± 0.25 mm (0.049 ± 0.010 inch)

(D) Length for applying 4C-9506 Retaining Compound on the injector sleeve ... 4.0 mm (0.16 inch)

(1) Apply clean engine oil to 12 O-ring seals.

Illustration 2	g01446630
Right side view of engine

Note: Before assembly, apply 6V-6640 Sealant to the bore of four cup plugs.

(G) Installation depth of four cup plugs ... 1.25 ± 0.25 mm (0.049 ± 0.010 inch)

Illustration 3	g01523906
View E-E

(K) Height of new cylinder head ... 158.00 ± 0.15 mm (6.220 ± 0.006 inch)

Note: Before assembly, apply 6V-6640 Sealant to the bore of two cup plugs.

(L) Installation depth of two cup plugs ... 1.25 ± 0.25 mm (0.049 ± 0.010 inch)

Illustration 4	g01523910
View H-H

Note: Before assembly, apply 6V-6640 Sealant to the bore of two cup plugs.

(N) Installation depth of two cup plugs ... 1.25 ± 0.25 mm (0.049 ± 0.010 inch)