（1）逐缸切削油：逐缸方法用于确定喷砂缸的位置。如果将油切到某个气缸，声音会大大降低或消失，并且在恢复供油时可以清晰听到。“喀哒”声表示气缸活塞撞击气缸。
(1) Cylinder by cylinder cutting oil: the cylinder by cylinder method is used to determine the position of the sandblasting cylinder. If the oil is cut to a certain cylinder, the sound will be greatly reduced or disappeared, and can be heard clearly when the oil supply is restored“ The "click" sound indicates that the cylinder piston hits the cylinder.
（2）为了进一步确认气缸的活塞已被撞到，可以将气缸的喷油器取下，可以向气缸中添加少量的CD级增压油（密封），并安装一个喷油器，然后引擎启动。敲击声消失或减弱。手术后，再次发生爆震，毫无疑问，它敲击了气缸的活塞。
(2) In order to further confirm that the piston of the cylinder has been hit, the injector of the cylinder can be removed, a small amount of CD grade booster oil (seal) can be added to the cylinder, and an injector can be installed, and then the engine starts. The knocking sound disappears or weakens. After the operation, there was another knock, which undoubtedly knocked on the piston of the cylinder.

对于活塞缸，可以使用以下方法：
For piston cylinders, the following methods can be used:
（1）发动机启动后，发动机会在低温下发出爆震声。温度恢复正常后，声音消失，无需进一步处理即可暂时进行处理。
(1) After the engine is started, the engine will knock at low temperature. After the temperature returns to normal, the sound disappears and can be processed temporarily without further processing.
（2）发动机温度正常时，有明显的爆震声。尽量避免高速操作，拆卸和维护。
(2) When the engine temperature is normal, there is obvious knock sound. Avoid high speed operation, disassembly and maintenance as far as possible.
（3）拆下气缸盖并拔出活塞后，发现气缸严重脱离或变形，或活塞与气缸之间的间隙太大，应更换气缸套，活塞和活塞环。
(3) After removing the cylinder head and pulling out the piston, it is found that the cylinder is seriously separated or deformed, or the gap between the piston and the cylinder is too large. The cylinder liner, piston and piston ring should be replaced.
（4）如果发现连杆变形，则应尽可能更换。
(4) If the connecting rod is found to be deformed, replace it as far as possible.
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