C11 and C13 Industrial Engines Caterpillar

Illustration 1	g01451338
Top view of cylinder head

Note: The top surface of the cylinder block for the gasket, the cylinder liners, and the bottom surface of the cylinder head for the gasket must be free of oil, fuel, water, and other contaminants before assembly.

Note: Before assembly, lubricate the threads of the bolts and both sides of the washers with Loctite Graphite-50.

Use the following procedure to tighten the cylinder head bolts:

1. Tighten bolt 1 through bolt 26 in a numerical sequence to 170 ± 10 N·m (125 ± 7 lb ft).

2. Again tighten the bolt 1 through bolt 26 in a numerical sequence to 170 ± 10 N·m (125 ± 7 lb ft).

3. Place a mark on bolt 1 through bolt 26. Rotate bolt 1 through bolt 26 in a numerical sequence to an extra 120 ± 5 degrees (1/3 turn).

4. Loosen bolt 1 through bolt 26 to 0 N·m (0 lb ft).

5. Tighten bolt 1 through bolt 26 in a numerical sequence to 170 ± 10 N·m (125 ± 7 lb ft).

6. Again tighten the bolt 1 through bolt 26 in a numerical sequence to 170 ± 10 N·m (125 ± 7 lb ft).

7. Place a mark on bolt 1 through bolt 26. Rotate bolt 1 through bolt 26 in a numerical sequence to an extra 120 ± 5 degrees (1/3 turn).

8. Tighten bolt 27 through bolt 34 in a numerical sequence to 55 ± 10 N·m (41 ± 7 lb ft).

Illustration 2	g01446056
Top view of cylinder head (D-D) five cup plugs (E-E) six cup plugs

Illustration 3	g01451339
View A-A (J-J) one cup plug

Illustration 4	g01451344
View B-B (K-K) two cup plugs

Illustration 5	g01451346
View C-C (L-L) four cup plugs

Illustration 6	g01451351
View F-F (M-M) five cup plugs (N-N) 12 cup plugs

Note: Apply Loctite 540 to the bores for the cup plugs prior to the installation of the cup plugs.

(G) Installation depth of the 14 cup plugs from the cylinder head surface ... 1.5 ± 0.5 mm (0.06 ± 0.02 inch)

(H) Installation depth of the 21 cup plugs from the cylinder head surface ... 3.0 ± 1.0 mm (0.12 ± 0.04 inch)

Note: The flatness of the surface of the cylinder head that mates to the cylinder block 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 (5.905 inch) span.