C15 and C18 On-Highway Engines Cylinder Head - Remove and Install Caterpillar


Cylinder Head - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
Loctite Graphite-50 Anti-Seize Lubricant 
8T-2998  Lubricant 
Loctite 242 Threadlocker Medium Strength, Blue 
Loctite C5-A Anti-Seize Lubricant  

Start By:

  1. Remove the camshaft gear.

  2. Remove the electronic unit injectors.

  3. Remove the rocker arm and shafts.

  4. Remove the valve mechanism cover base.

  5. Remove the exhaust manifold.

  6. Remove the fuel filter base.

  7. Remove the fumes disposal group.

  8. Remove the exhaust gas induction valve.

  9. Remove the engine oil filter base.

  10. Remove the boost pressure sensor.


    Illustration 1g01377731

  1. Remove bolt (1) and thrust plate (2) in order to remove adapter (3).

  2. Remove bolts (4) and plate (5).


    Illustration 2g01377738

  3. Remove sealing plate (6).


    Illustration 3g01377739

  4. Remove O-ring seal (8) and O-ring seal (9) from sealing plate (7).


    Illustration 4g01867334

  5. Remove bolts (10).


    Illustration 5g01867354

  6. Use a suitable lifting device in order to remove cylinder head (11). The weight of cylinder head (11) is approximately 293 kg (645 lb).


    Illustration 6g01867473

  7. Remove oil seal (12), water seals (13), and gasket (14), from the cylinder block.


    Illustration 7g01867515

  8. Remove spacer plate (15) from the cylinder block.


    Illustration 8g01867534

  9. Remove gasket (16) from the cylinder block.

  10. Remove O-ring seal (17) from the dowel in the cylinder block.

Installation Procedure

  1. Install the cylinder head in reverse order.

    1. Apply Tooling (A) to the threads of cylinder head bolts (10) and the washers.


      Illustration 9g01072801

      Note: The bolts that are marked "x" are 216 mm (8.50 inch) long: 11, 12, 13, 14, 16, 18, 20, 22, 24 and 26. The remaining bolts are 194 mm (7.60 inch) long.

    2. Tighten the cylinder head bolts according to the following procedure.

      • Tighten bolts 1 through 26 to a torque of 270 ± 15 N·m (200 ± 11 lb ft) in a numerical sequence.

      • Tighten bolts 1 through 26 to a torque of 450 ± 15 N·m (330 ± 11 lb ft) in a numerical sequence.

      • Tighten bolts 1 through 26 again to a torque of 450 ± 15 N·m (330 ± 11 lb ft) In a numerical sequence.

    3. Apply a 50/50 mixture of Tooling (B) and clean engine oil onto O-ring seal (8) and O-ring seal (9) prior to assembly.

    4. Apply Tooling (C) onto the threads of bolts (1).

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