As long as the engine works normally, the idle speed is stable, the power output and fuel consumption do not change much, and the exhaust gas does not emit blue smoke, there is no need to replace the Bitzer 4VC Piston.

The Bitzer 4VC Piston is the reciprocating part in the engine block. The basic structure of the piston can be divided into top, head and skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of small heat-absorbing area. There are often various pits on the top of the diesel engine piston, and their specific shape, location and size must be adapted to the requirements of the diesel engine's mixture formation and combustion.

Signs of changing Bitzer 4VC Piston:

1. When the engine is overhauled, if it needs to be replaced (checked), the principle of replacing the original Bitzer 4VC Piston is to be the principle. According to the old standard, when the vehicle travels 100,000km, it needs to be replaced, but the design of new cars can sometimes even run to 20,000KM No need to replace, such a "phenomenon" is not uncommon. Specifically, the actual inspection is the standard.

2. When it is felt or found that the power performance of the engine has decreased significantly, and the wear of the cylinder block edge is too high (0.15mm), or the end clearance of the Bitzer 4VC Piston ring exceeds the standard (about 2mm). When the consumption of fuel and lubricating oil increases sharply, and the spark plug is prone to carbon deposition.

3. Reasons for driving, maintenance, lubrication system, etc. cause the Bitzer 4VC Piston ring to break.