When a car friend E90 was driving, the instrument indicated the power generation fault. Due to the generator failure, the vehicle broke down while driving, and the vehicle was rescued to the store. After inspection, it was found that the generator shaft was damaged. The following problems were found in the process of inspection and repair. The engine was leaking oil seriously, and the front shock absorber was damaged. In the process of dealing with the oil leakage, the timing connection of the engine was found to be broken. Fortunately, the partner carefully found the hidden trouble in time. Avoid the engine damage caused by the complete fracture of the timing guide rail in the later stage. Abnormal noise was found in the generator drive belt tensioner and guide pulley during the maintenance of the generator fault. in view of the long mileage and abnormal noise, it is resolutely recommended to replace the new kit (100000 km replacement is recommended).
A car and clothing E90 suddenly stalled while driving, and the instrument indicated that the battery failed, so it was inconvenient for on-site maintenance, so the vehicle was towed to the repair shop for repair. according to the preliminary estimation, the power generation system failed.
The vehicle came to the store to check and found that the generator had no magnetic field, and the generator fault was preliminarily determined.
Dismantling the generator found that the carbon brush was gone, the copper ring on the shaft was polished, and the vehicle was found to have oil leakage.
The friction of the two groups of carbon brushes is completely different, maintenance two options, replacement of generator assembly (expensive, low risk,) maintenance generator replacement of separate copper rings and regulators (low maintenance cost, high risk)
During the inspection, it is found that the drive belt and the belt guide pulley have different hidden dangers in Chengdu. In the introduction, due to the dry noise caused by long-time maintenance-free, the belt appears aging cracks. Even if it is replaced.
Riders choose to directly replace the new generator, we choose when Bosch generator, the original car is also installed Bosch generator.
During the maintenance of generator failure, it is found that the vehicle is leaking oil seriously and needs maintenance.
The oil leakage at the lower part of the engine is also quite serious, so it is dripping.
Oil leakage also occurred in the two front shock absorbers.
There is also an oil leak in the oil pan pad.
Rubber seals almost have oil leakage due to the relationship of time.
The first maintenance is the oil seat and oil radiator oil leakage, you can replace the gasket. Clean it up at the same time.
Replace the brand-new sealing ring
Regular accessories are resistant to high temperature and have a long service life and can be used casually for two years.
Yuanbaoliang needs to be removed to replace the oil pan gasket, which takes a long time.
The interior of the machine looks OK, there is no sludge.
In the process of inspection, it is found that the connecting wrench of the timing mechanism is broken, fortunately it is not the main part of the fracture.
Oil pan gasket selection of Dena accessories, the quality of 100% no problem, used for many years of accessories brand.
Choose just-in-time guideway is also a big brand accessories, refuse fake goods, the real original parts but the price will not be so cheap (their own products), maintenance must ensure the quality of maintenance, otherwise it is empty talk.
It will take some time to change the rails.
The guideway is a plastic part, and the mileage can be checked at any time.
After replacing the guide rail, tighten the screws according to the standard.
Recalibrate timing.
After dealing with the oil leak in the lower part of the engine, it looks much more comfortable.
Do not underestimate these sealing rings, a small sealing ring can also cause failure.
The front shock absorber is ZF’s shock absorber, which can be used freely for 60, 000 kilometers in two years.
Both are produced by the same company.
The replacement parts are repaired this time.
After cleaning the cabin, prepare for delivery.
This generation of E90 chassis is solid, the shape is also beautiful, now the price is not bad, the maintenance is not high. A good E90 is really good to get one.
OpheliaAlcott 
6 
September 15, 2024 
