What is the normal cylinder pressure for an engine?

[StPaislee]

For gasoline engines, the cylinder pressure is generally between 8-11 bar, while for diesel engines, it is typically between 12-16 bar. Introduction to cylinder pressure in gasoline engines: For a four-cylinder engine, a pressure of no less than 7 bar is considered normal. Cylinder pressure varies by vehicle model. Generally, large vehicles (such as Dongfeng 140 and Jiefang 141) have a normal range of 6-8 kg, while small cars should have a pressure above 8 kg. If the pressure is below the normal range, it can be determined that the engine has a fault. Precautions for cylinder pressure in gasoline engines: Carefully remove all spark plugs, as inspecting them can reveal many issues. Oily spark plugs indicate wear between the piston rings and cylinder walls or worn valve guides. Burnt spark plugs suggest vacuum leakage. Using a starter to rotate the engine too slowly can lead to inaccurate results.