How to do if the vehicle leaks oil?

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, early damage of the parts may be caused, and even hidden accidents may be left. Therefore, the vehicle oil leakage fault, which is one of the common faults, is often listed as an important criterion and content for assessing the quality of automobile assembly and repair and the driver's car insurance.

First, the main reason for common vehicle oil leakage

1. The product (accessory) is poor in quality, material, or process; there is a problem with the structural design.

2. Improper assembly of high speed, improper mating surfaces, broken gaskets, displacement, or failure to install according to operating specifications.

3. The tightening force of the tightening nut is not uniform, the slide wire is broken or the looseness is loose, and the work is invalid.

4. The seal material wears too long after long-term use, aging deterioration, deformation failure.

5. Too much lubricating oil, too high oil level or wrong oil.

6. Deformation and deformation of the joint surface of the components (such as side covers and thin-walled parts) and damage to the housing will cause the oil to leak out.

7. After the air plug and the one-way valve are blocked, due to the pressure difference between the inside and outside of the box, it often causes oil leakage in the weak sealing area.

Second, prevent 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 of leakproof sealing. 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. When disassembling, pay attention to proper placement, carefully inspect and assemble according to specifications.

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 the aging of rubber. Found that leakage should be updated.

4. If the auto parts are used for too long, there will be excessive wear (such as pistons and cylinders), which will cause high-pressure gas in the combustion chamber to enter the crankcase and force the oil to leak. Therefore, when the outer cover of the oil filler cover is severe, wear parts should be repaired or replaced as soon as possible.

5. Avoid check valve, vent valve blocked. As a result, the temperature in the enclosure rises, the oil and gas fill the entire space, and the canal is not discharged. As a result, the pressure in the enclosure increases and the lubricant consumption increases and the replacement cycle shortens. After the engine's 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.

6. Properly solve all types of oil pipe joint seals. The joint nut of the vehicle is often disassembled and disassembled, and the slide wire is easily broken and loose; the accuracy of the two joints' bell mouth is poor, the center line of the two cones is not coincident and the contact is bad; the taper is different but not consistent, which will cause oil leakage. . Replace the union nut, use a grinding method to solve the cone seal, make the nut tight and solve the seal.

7. Avoid hub throwing oil. Wheel hub bearings and cavity too much lubricating oil, or its oil package is not properly equipped, 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, the "cavity lubrication method (that is, the amount of lubrication)" is useful to clear the ventilation holes, strictly select high-quality accessories, and assembly and high-speed according to the process specification.

Third, the vehicle maintenance and repair points

Assembly under extremely clean conditions, without any bumps, scratches, burrs, and other attachments on the work surface; strict operating procedures, seals should be properly installed to prevent deformation in place; grasp the performance specifications and requirements for seals , timely replacement of failures; for the side cover type thin-walled parts, the use of sheet metal cold correction; easy to wear shaft hole parts can be metal spraying, welding repair, adhesive, mechanical processing and other processes to achieve the original size; Use sealant as much as possible, if necessary, use a paint substitute to achieve the desired sealing effect; nut slip wire breakage, loosening should be repaired or replaced with new parts, and screw to the specified torque; rubber seals should be carefully checked before assembly quality; Special tools are used for press-fitting to avoid ramming and deforming. Lubricating grease is added according to the regulations. Regular cleaning is needed to clear the ventilation holes and check valves. As long as the above points are achieved, the problem of vehicle oil leakage is completely curable.

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