3126 Truck Engine Military Caterpillar

Installation Procedure

1. Thoroughly clean the mating surfaces of the cylinder head and the cylinder block.

2. Visually inspect the bolt holes for the cylinder block for thread damage.

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Illustration 1	g00611342

3. Install a new cylinder head gasket (3) .

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Illustration 2	g00746424

Note: To avoid damage to the cylinder head gasket, use guide bolts of an appropriate size to install the cylinder head.

4. Attach a suitable lifting device to the cylinder head. Position the cylinder head assembly onto the dowels in the cylinder block. Lower the cylinder head onto the cylinder block.

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Illustration 3	g00748574

5. Inspect the condition of cylinder head bolts (1) and (2). Replace cylinder head bolts (1) and (2), if necessary.

6. Lubricate cylinder head bolts (1) and (2) with clean engine oil. Install cylinder head bolts (1) and (2). Follow Step 7 for the correct tightening procedure.

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Illustration 4	g00794320

7. Tighten the cylinder head bolts according to the following procedure:

   1. Tighten bolt (1) through bolt (14) in a numerical sequence to a torque of 300 ± 15 N·m (221 ± 11 lb ft).

   2. Loosen bolt (1) through bolt (14) until washers are loose under the bolt heads.

   3. Tighten bolt (1) through bolt (14) again in a numerical sequence to a torque of 130 ± 15 N·m (96 ± 11 lb ft).

   4. Tighten bolt (1) through bolt (14) again in a numerical sequence to a torque of 130 ± 15 N·m (96 ± 11 lb ft).

   5. Place a mark on bolt (1) through bolt (14). Rotate bolt (1) through bolt (14) in a numerical sequence for an additional 90 degrees (1/4 turn).

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

End By:

1. Install the exhaust manifold. Refer to Disassembly and Assembly, "Exhaust Manifold - Remove and Install".
2. Install the inlet manifold. Refer to Disassembly and Assembly, "Air Inlet Manifold - Install".
3. Install the water temperature regulator housing. Refer to Disassembly and Assembly, "Water Temperature Regulator Housing - Remove and Install".
4. Install the unit injectors. Refer to Disassembly and Assembly, "Unit Injector - Install".
5. Install the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove and Install".