Engine cylinder knocking phenomenon, causes and solutions

With the increase of automobile service life, it is inevitable that some faults will occur, such as engine knocking. So what are the phenomena, causes and solutions of engine knocking?

The so-called engine knocking refers to the phenomenon of metal knocking when the pressure rise rate in the cylinder is too large. When a car knocks on the cylinder, it is necessary to check whether the engine is insufficiently lubricated.

If the pressure or viscosity of the oil is too low, it will cause the engine to knock without lubrication. Even the lower the engine temperature, the louder the knocking sound will be; The main reason is that the gap between piston and cylinder is too large, which will lead to engine knocking, usually in low temperature environment.

When the engine is in winter, it will lead to insufficient lubrication of the cylinder; If the fluidity of internal engine oil becomes worse, or the cylinder wall is not fully lubricated, then cylinder knocking will occur; You need to wait for the engine temperature to rise and let the oil play a normal role in lubrication, and then you will avoid engine knocking.