Internal braking quality of 460 Yuchai engine.

1. Engine cylinder shortage mainly refers to that one or more cylinders of the engine are not working normally, which is generally manifested as: the exhaust gas flow discharged by the automobile is obviously intermittent, and the exhaust pipe is severely shaken, and the engine "chug" sound or plop, plop sound can be clearly heard. This phenomenon is closely related to the failure of ignition coil. It's a bit like the sound of a pencil knocking on the table. An increase in sound is equivalent to an increase in engine speed. Possible cause: There is dust in the engine. It is recommended to change the oil, filter the engine and clean the engine. There may be a valve problem.

Due to poor lubrication conditions and excessive wear of piston and cylinder wall, the clearance fit tolerance between piston and cylinder wall is beyond the normal range. When the engine is running, the piston skirt collides with the cylinder wall, producing a crisp sound, which is generally obvious at idle speed or low speed.