In the use of the vehicle, oil leakage faults often occur, which will directly affect the technical performance of the vehicle, resulting in the waste of lubricating oil and fuel, power consumption, affecting the cleanliness of the vehicle, and causing environmental pollution. Due to the leakage of oil and the reduction of lubricant inside the machine, resulting in poor lubrication of the parts and insufficient cooling, it may cause early damage to the parts and even cause hidden accidents.
First, the main reasons for common vehicle oil leakage 1, the product (accessories) quality, material or process is not good; structural design problems.
2, improper assembly of high speed, with the surface is not clean, broken gasket, displacement or not in accordance with operating specifications to install.
3. Unstable nut tightening force, slipping of the slide wire, loosening of the slide wire, etc., cause work failure.
4, the seal material after long-term use of excessive wear and tear, aging deterioration, deformation failure.
5, lubricating oil added too much, the oil level is too high or the wrong oil products.
6, parts (edge ​​cover, thin wall) joint surface deflection, shell damage, so that the lubricating oil seepage.
7. After plugging of air plugs and one-way valves, the pressure difference between the inside and outside of the box will often cause oil leakage in the weak sealing area.
Second, prevention of vehicle oil leakage measures 1. Pay attention to the role of cushions. The gaskets between the parts where the vehicle rests (such as the joint end faces, the end caps, the housing, the cover mat, the plane cover plate, etc.) play a role in preventing leakage. If the material, production quality and installation do not meet the technical specifications, it will not achieve sealing leakage, even accidents. Such as the oil pan or valve cover, due to the large contact area and difficult to compact, resulting in oil spills.
2. All types of fastening nuts on the vehicle must be tightened according to the specified torque. If the pressure is too tight, the gasket will leak; if it is too tight, it will cause the metal around the screw hole to bulge or screw the screw to cause oil leakage. In addition, if the oil drain plug of the oil pan is not tightened or loosened, it will easily cause the loss of oil, and then the machine damage of “burning and holding the shaft†will occur.
3. Replace the failed oil seal in time. Many moving parts on the car (such as oil seals, O-rings) will be improperly installed, the journal and the oil seal blade are not the same, and the oil will be thrown off. Some oil seals used for too long will lose their elasticity due to aging of the rubber. Found that leakage should be updated.
4. Avoid check valve, vent valve blocked. As a result, the temperature in the enclosure rises, oil and gas fill the entire space, and emissions do not go out. As a result, the pressure in the enclosure increases and the lubricant consumption increases and the replacement cycle shortens. After the engine ventilation system is blocked, the piston's movement resistance is increased and the fuel consumption is increased. Due to the pressure difference between the inside and outside of the enclosure, it often causes oil leakage in the weak sealing area. Therefore, vehicles need to be regularly inspected, dredged and cleaned.
5. Properly solve all types of oil pipe joint seals. The joint nut of the vehicle is often disassembled and assembled, and it is easy for the slip wire to break and loosen, which can cause oil leakage. Replace the union nut, use a grinding method to solve the cone seal, make the nut tight and solve the seal.
6. Avoid hub throwing oil. Wheel hub bearings and cavity too much lubricating oil, or its oil packaging with inappropriate, poor quality and aging failure; brakes frequently caused by the hub temperature is too high; axle nut loose, etc. will cause the hub to throw oil. Therefore, use the "cavity lubrication method (that is, the amount of lubrication)" to clear the ventilation hole.