How often should car pistons be replaced?

[OOscar]

How often car pistons should be replaced can be determined based on actual conditions. As long as the engine operates normally, idles smoothly, has no significant changes in power output and fuel consumption, and no blue smoke comes from the exhaust, there is no need to replace the pistons. Pistons are reciprocating components in the cylinder block of a car engine. The basic structure of a piston can be divided into the top, head, and skirt. The piston top is the main part of the combustion chamber, and its shape is related to the selected combustion chamber type. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. Diesel engine piston tops often have various types of recesses, and their specific shape, position, and size must be adapted to the requirements of mixture formation and combustion in diesel engines.