一台丰田子弹头车发动机(2TZ-FE型)因水温高和常缺水而来修理。检查表明,发动机气缸盖平面第4缸处的水道孔因受品质差的防冻液腐蚀而与气缸相通(未与气缸盖上的燃烧室相通),如图1所示。由于在发动机工作时气缸处于高温、高压状态,用一般的修补方法不能修复该气缸盖,所以决定采用镶 A Toyota bullet car engine (2TZ-FE type) due to high water temperature and water often to repair. The inspection showed that the water hole at the cylinder 4 in the plane of the cylinder head of the engine was communicated with the cylinder due to the corrosion of the poor quality antifreeze (not communicating with the combustion chamber on the cylinder head) as shown in FIG. 1. Since the cylinder is under high temperature and high pressure while the engine is working, the cylinder head can not be repaired by a normal repair method, so it is decided to use the insert