汽油机和柴油机的机体出现裂纹时，感到很棘手，往往是刚补焊没用多久，又在原处开出更长的裂纹。其实只要处理得当，这类问题是可以得到很好地解决的。 1裂纹的查找及预处理 　　首先对发现的裂纹用碱水刷洗干净，然后用气焊炬烧，以完全消除裂纹内外的油垢，用煤油检查出裂缝 Gasoline engine and diesel engine body cracks, it is very difficult, often just repair welding useless how long, but also in the original place out a longer crack. In fact, such problems can be well solved if properly handled. 1 Crack Find and pretreatment First found on the crack scrubbing with alkali water, and then use the gas torch burning, to completely eliminate the crack inside and outside the grease, with kerosene to detect cracks