拖拉机使用中,由于过热后骤加冷水或冷天骤放热水都会引起缸盖、缸套炸裂。发动机工作时,轻微裂纹的现象是:水箱口的水平面会慢慢升高,当高到30～50毫米时,冒出一个大气泡后,水平面骤然下降。当裂纹大或缸垫局部冲烂时,水箱口处像开锅一样,气泡接连不断地出现,这说明气缸内的压缩气体通过裂纹窜入了冷却系统。为了排除这个故障,推荐采用下述判断方法。 Tractor use, due to overheating sudden cold water or cold water can cause sudden hot water cylinder head, cylinder burst. Engine work, the phenomenon of minor cracks: the level of the tank mouth will slowly rise, when the height of 30 to 50 mm, emerge a big bubble, the water level suddenly dropped. When the crack is large or the cylinder cushion is partially scouring, the bubble at the mouth of the water tank appears like a pot, which shows that the compressed gas in the cylinder flew into the cooling system through the crack. In order to eliminate this fault, recommend the following judgment method.