G3400 Engines (EIS) Caterpillar


Mechanical Noise (Knock) in Engine

Usage:

G3408C 3WR

Probable Causes

  • Driven equipment

  • Cylinder head and related components

  • Gear train

  • Crankshaft and related components

  • Piston

Recommended Repairs

Driven Equipment

Inspect the alignment and the balance of the driven equipment. Inspect the coupling. If necessary, disconnect the driven equipment and test the engine.

Cylinder Head and Related Components

Inspect the components of the valve train for good condition. Check for signs of damage and/or wear to the valves, cylinder head gasket, etc. Inspect the condition of the camshafts. If a camshaft is replaced, new valve lifters must be installed.

Gear Train

Inspect the condition of the gear train.

Inspect the engine oil filters for nonferrous material. Flaking of nonferrous material could indicate worn gear train bearings.

Crankshaft

Inspect the crankshaft and the related components. Inspect the connecting rod bearings and the bearing surfaces on the crankshaft. Make sure that the bearings are in the correct position.

Look for worn thrust plates and wear on the crankshaft.

Piston

Make sure that the piston pin is correctly installed.

Inspect the condition of the pistons according to Guidelines for Reusable Parts and Salvage Operations.

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