Analysis of Cylinder Head Cylinder Head Leakage and Solution

Analysis of Cylinder Head Cylinder Head Leakage and Solution

1.Observation Method The observation method adopts visual inspection and touch methods. Only for severe cracks or cracks. However, due to trace leakage, there are obvious traces of rust outside the cylinder. Although this method is simple, it is difficult to detect tiny cracks. The oil immersion method should be used to find cracks that are not easily visible to the naked eye.
2.Oil immersion method The oil immersion method is to use kerosene or washing oil to soak suspicious parts and wipe them clean; Then sprinkle white powder evenly over the top and hit the cylinder with a wooden hammer. Oil marks appear in the broken white layer due to oil penetration. Although the oil immersion method has the advantages of convenient operation and quick inspection, it is not convenient for the inner parts of the cylinder block and the uneven parts.
3.This method must be carried out under the condition that the cylinder block and the cylinder head are combined according to the provisions. The operation method is: block the inlet of the pump, so that the pump outlet line is equipped with compressed air (also through the hydraulic press). The water should be heated to full pressure during the test. The pressure of the compressed air on the water is kept at 0.3 M Pa 0. 5 M Pa for 5 minutes. Observe the appearance and parts of the cylinder. The leaked website. The hydrostatic test is slow, so it is necessary to observe carefully through visual observation to find leakage, and it is inevitable to miss detection.
4.Pressure test method The test preparation is basically the same as the hydrostatic test. The operation method is: clean the body, put it into a pool containing hot water, and then add compressed air to the waterless water jacket. Keep up the pressure. At zero. 3 M Pa 0. 5 M Pa. At this time, there must be bubbles in the leakage area, and the size of the crack or trachoma can be determined according to the degree of bubble generation. This method can identify not only leakage, inner leakage, but also oil leakage of cooling system. Although the method is complex, it can find the leakage location accurately without missing, which has its unique advantages.