Check the oil drain screws. For example, the engine and gearbox have oil drain screws. Due to frequent disassembly and assembly, the screws here are extremely easy to slip. Check the oil filter screw again. Because the oil filter is installed with too much force, it may slip; you can directly replace the filter element screws, but generally there is no problem here.
Check whether the oil seal is aging. The oil seal is also called the oil retainer. It mainly prevents sediment, dust, water vapor, etc. from intruding into the bearing from the outside. Which oil seal in the component is broken can be solved directly.
Causes of automobile oil leakage:
1. The quality, material or workmanship of the product (accessories) is poor, and there are problems with the structural design.
2. Improper assembly, the mating surfaces of the parts are not clean, the gasket is damaged or displaced, or the installation is not carried out according to the operating procedures.
3. Uneven tightening of the fastening nuts, broken or loose slide wires, etc., leading to work failure.
4. After long-term use, the sealing material wears excessively, ages, deteriorates, deforms and fails.
5. Too much lubricating oil is added, the oil level is too high or the wrong fuel is added.