How to see the installation direction of the piston mark



How to check the installation direction of the piston mark: 1. The top surface of the piston is marked with an arrow. When installing, the arrow should face the direction of the exhaust valve, that is, the front end of the vertical engine, which can reduce the impact of the piston on the cylinder wall. 2. The top surface of the piston has the word IN, and the side marked with IN is installed on the side close to the intake valve.

The piston is the reciprocating part in the cylinder block of the automobile engine. 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 its specific shape, location and size must be adapted to the requirements of the diesel engine's mixture formation and combustion.

If the piston is installed in the wrong direction, there will be a small noise, and if it is large, there will be serious consequences such as top valve and cylinder pulling. In addition, some engine pistons are designed with an eccentric piston pin hole. If installed in reverse, it will affect the performance of the engine.


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