Usually, the Copeland discus piston of the car we drive can be replaced free of charge for life. As long as the engine operates 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 piston.

Copeland discus piston is a reciprocating part in the engine cylinder 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. The top of the Copeland discus piston often has various pits, and its specific shape, location and size must be adapted to the requirements of the diesel engine's mixture formation and combustion.

Signs of changing the Copeland discus piston:

1. When the engine is overhauled, if it needs to be replaced (inspected), the principle of replacing the original parts (piston rings) is to be the principle. According to the old-fashioned standard, when the vehicle travels 100,000km, it needs to be replaced, but the design of new cars can sometimes even run. It does not need to be replaced until 20000KM, 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 is significantly reduced, and the edge of the cylinder block is too worn (0.15mm), or the end clearance of the Copeland discus piston 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 Copeland discus piston to break.