3512 and 3516 EUI Engines and 784B, 785B, 789B and 793B Off-Highway Truck/Tractors Caterpillar

Illustration 1	g01429899
Typical example (1) Locating pad (2) Pipe plug

Illustration 2	g01608653

Use the following procedure to tighten the cylinder head bolts:

Note: Before assembly, coat the threads of the cylinder head bolts with clean engine oil.

1. Tighten the bolt 1 through bolt 8 in the numerical sequence that is shown in Illustration 2 to 30 ± 5 N·m (22 ± 4 lb ft).

2. Tighten the bolt 1 through bolt 8 in the numerical sequence that is shown in Illustration 2 to 400 ± 35 N·m (300 ± 26 lb ft).

3. Tighten the bolt 1 through bolt 8 in the numerical sequence that is shown in Illustration 2 to 575 ± 20 N·m (420 ± 15 lb ft).

Note: Tighten the bolts (3) only after the cylinder head bolts have been given final torque.

(3) Torque for two bolts ... 55 ± 10 N·m (41 ± 7 lb ft)

Illustration 3	g01430598
Typical example

Note: Apply 6V-6640 Sealant to the bores of the cup plugs before assembly.

(A) Depth of the cup plugs in the top of the cylinder head ... 9.0 ± 0.5 mm (0.35 ± 0.02 inch)

(B) Height of new cylinder head ... 142.00 ± 0.15 mm (5.591 ± 0.006 inch)

(C) Depth of the cup plugs in the cylinder head below the bottom of the chamfer ... 1.0 ± 0.5 mm (0.04 ± 0.02 inch)