judge

When the engine is running, some pistons knock abnormally. The abnormal sound of the piston knocking on the cylinder occurs at the upper part of the cylinder, which is a rhythmic "rattling" sound similar to that of hitting the concrete floor with a small hammer. When the engine is idling, the sound is obvious and clear. Especially when the engine is running at low temperature, the sound is obvious. When the temperature rises, the sound will reduce or even disappear

In the same series of fish feeding clusters, the piston structure is not necessarily the same, so when selecting pistons, the corresponding type of piston must be selected according to the type of engine. On the same engine, the piston with the same brand, group or product code should be selected