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C3.4B Engines for Caterpillar Built Machines Caterpillar


Cylinder Head - Inspect

Usage:

CCS7 4B2

  • Remove the cylinder head from the engine.

  • Remove the water temperature regulator housing.

  • Inspect the cylinder head for signs of gas or coolant leakage.

  • Remove the valve springs and valves.

  • Clean the bottom face of the cylinder head thoroughly. Clean the coolant passages and the lubricating oil passages. Make sure that the contact surfaces of the cylinder head and the cylinder block are clean, smooth, and flat.

  • Inspect the bottom face of the cylinder head for pitting, corrosion, and cracks. Inspect the area around the valve seat inserts and the holes for the fuel injection nozzles carefully.

  • Test the cylinder head for leaks at a pressure of 200 kPa (29 psi).
    Show/hide table
    Illustration 1g03698264
    Flatness of the cylinder head (typical example)
    (A) Side to side
    (B) End to end
    (C) Diagonal

  • Measure the cylinder head for flatness. Use a straight edge and a feeler gauge to check the cylinder head for flatness.

    • Measure the cylinder head from one side to the opposite side (A).

    • Measure the cylinder head from one end to the opposite end (B).

    • Measure the cylinder head from one corner to the opposite corner (C).

    Refer to Specifications, "Cylinder Head" for more information.

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