The low tone is reinforced by the load. The most common usage is the wear and tear of the indigenous bearings of the Colenwala. Sometimes accompanied by a burning lamp of oil pressure.
The metallic sound of the average tone, which is heavily increasing under load. He's talking about the wear and tear of the shaft bearings of the Colenwala.
The metallic rattle of a high tone. Maybe he's talking about the wornout piston fingers.
A stool that resembles a clay tableware, which is reduced by the warm-up of the engine. This is about the wear of the piston or the cylinders.
Metal tap with dull noise speaks of problems with valves.
The pounding of the acceleration is a sign of detonation in the engine.
