Car in use，Oil leakage often occurs，It will directly affect the technical performance of the car，Cause lubricant、Waste of fuel，Consumption of power，Affecting the cleanliness of the car，Cause environmental pollution。Due to oil leakage、Reduced lubricating oil inside the machine，Resulting in poor lubrication of machine parts、Insufficient cooling，Will cause early damage to the machine parts，Even leaving potential accident hazards。

1. The main causes of common vehicle oil leakage

1、Product (accessories) quality、Poor material or workmanship;There are problems with structural design。

2、Improper assembly speed，The mating surface is not clean，Packing damaged、Displacement or installation not in accordance with operating procedures。

3、Uneven tightening force of tightening nuts、The sliding wire is broken or loosened, causing work failure。

4、Sealing material wear exceeds limit after long-term use，Aging and deterioration、Deformation failure。

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

6、Parts (side covers、Thin-walled parts) joint surface deflection deformation、The shell is damaged，Cause lubricating oil to seep out。

7、Vent plug、After the one-way valve is blocked，Due to the difference in air pressure between the inside and outside of the box，Often causes oil leakage at weak sealing points。

2. Measures to prevent vehicle oil leakage

1. Pay attention to the padding function.

Stationary parts seabet myof the car (such as each joint end face、Each end cap、Casing、Cover Pad、The gasket between components such as flat enamel covers plays a leak-proof sealing role。If in the material、The production quality and installation do not meet the technical specifications，It will not be able to seal and prevent leakage，Even accidents occurred。Such as oil pan or valve cover，Difficult to compact due to large contact area，Oil leakage caused by this。Pay attention to proper placement when disassembling and assembling，Check carefully，And assembled according to specifications。

2、All types of fastening nuts on the vehicle must be tightened to the specified torque。

The gasket will leak if it is too loose and not tight enough;Too tight will cause the metal around the screw hole to bulge or the thread to slip, causing oil leakage。Also，If the oil pan drain plug is not tightened or loosened and falls off，Easy to cause oil loss，The machine damage accident of "burning tiles and holding the shaft" occurred。

3. Replace the failed oil seal in time.

Many moving parts on the car (such as oil seals、O-ring) may be installed incorrectly，The journal and the oil seal cutting edge are not concentric，Yaw and throw away oil。Some oil seals will lose elasticity due to rubber aging after being used for a long time。Update if leakage is found。

4、Auto parts will wear out after being used for a long time (such as pistons and cylinders, etc.)

Causing high-pressure gas in the combustion chamber to escape into the crankcase，And force the oil to leak。Therefore，When the exhaust gas escapes severely from the oil filler cap，Wear parts should be repaired or replaced as soon as possible。

5. Avoid blockage of one-way valve and vent valve.

This causes the temperature inside the box to rise，Oil and gas fill the entire space、The discharge cannot exit the canal，Increases the pressure inside the tank and increases lubricating oil consumption and shortens the replacement cycle。After the engine ventilation seabet loginsystem is blocked，Increase the movement resistance of the piston，Increase fuel consumption。Due to the difference in air pressure between the inside and outside of the box，Often causes oil leakage at weak sealing points。Therefore, regular inspections of the vehicle are required、Unblock、Cleaning。

6. Properly solve the sealing problems of various types of oil pipe joints.

Vehicle union nuts are often disassembled and assembled，Easy to break the thread and loosen it;Poor accuracy of bell mouths of two connectors，The center lines of the two cones do not coincide and the contact is poor;The tapers are different but not consistent，This will cause oil leakage。Replace union nut，Use grinding method to solve the cone seal，Tighten the nut to solve the seal。

7. Prevent wheel hub from throwing oil.

Too much grease in the hub bearing and cavity，Or the oil seal is improperly matched，Poor quality and aging failure;Excessive hub temperature caused by frequent braking;Loose axle nuts, etc. will cause the wheel hub to throw oil。Therefore the "cavity lubrication method" is useful，Unblock the vent，Strictly select high-quality accessories，And perform assembly and high-speed according to process specifications。

3. Main points of vehicle maintenance

Assembled under extremely clean conditions，No bumps on the working surface of the parts、No scratches、Burrs and other attachments;Strict operating procedures，Seals should be installed correctly，Prevent deformation if not in place;Understand the performance specifications and usage requirements of seals，Replace failed parts in time;For thin-walled parts such as side covers，Using sheet metal cold correction;Shaft hole parts that are prone to wear can be metal sprayed、Welding repair、Adhesive、Machining and other processes to achieve original factory size;Use sealant as much as possible，If necessary, paint can be used instead to achieve the ideal sealing effect;The nut slider is broken、Loose parts should be repaired or replaced with new ones，And tighten to the specified torque;The appearance quality of rubber seals should be carefully checked seabet mybefore assembly;Use special tools to press fit，Avoid knocking and deformation;Add lubricating grease as required，Regularly clean and clear vents, one-way valves, etc.。As long as you do the above points，The problem of vehicle oil leakage can be completely cured。