What is the reason for the oil leakage from the right rear wheel of the car? What is the reason for the oil leakage from the rear right wheel of the car?

We often see cars leaving a trace of oil on the road after driving. Although there is not much leakage, for the sake of driving safety, even if there is a drop of oil leakage, you must check it carefully. After all, oil is flammable and explosive, and even a spark can ignite it. So what is the reason for the oil leakage from the rear wheel of the car?

Why is the oil leaking from the right rear wheel of the car?

It may be that the rear axle oil seal is broken, causing gear oil to leak.

If the braking effect is not affected, the cause of brake fluid leakage can be ruled out. The rear axle mainly contains the differential and half shafts. The differential is located in the central gear bag, and the two half shafts transmit power to the wheels on both sides. There is gear oil in the rear axle cavity, which is used to lubricate the differential. Under normal circumstances, there is not much gear oil in the rear axle. It is mainly lubricated by the differential rotation and splash. There are oil seals at both ends of the rear axle to prevent gear oil from leaking from both sides.

It is recommended to replace the rear axle oil seal. Do not add too much gear oil, just enough to cover part of the differential. The differential will bring up the gear oil during rotation, so do not add too much, otherwise the oil seal will be damaged.

What causes oil leakage from car wheels?

There is a differential vent valve on the top of the differential. First, twist it back and forth. If there is oil leakage from the hubs at both ends, the breather valve is clogged.

Then look at the amount of differential lubricating oil. If the amount of lubricating oil increases, check the quality of the lubricating oil and replace it if any abnormality is found. Because when the vehicle is exposed to water, water can easily enter through the ventilation holes.

If everything is normal, disassemble and check the rear wheel oil seal, and check the butter in the shaft head. You don’t need too much butter, just spread it on the bearings, otherwise it will not be good for the hub’s heat dissipation. If the hub temperature is too high, the butter will melt, the pressure in the hub will increase, and the oil seal will burst. It is recommended to directly replace the shaft head oil seal. You can also see if the half shaft oil seal needs to be replaced.

What is the function of the grooves of car wheels?

First of all, it enhances adhesion, that is, gripping force. To ensure that the vehicle drives stably and does not deviate from the driving direction, especially when driving on rough and uneven roads, the grooves allow the vehicle to better adhere to the ground when turning, accelerating, and braking.

In addition, in rainy days, the water when the tire is in contact with the ground can be drained from the grooves, and the slippery road surface in rainy days can also grip the ground well. Without tread, there would be a film of water between the tire and the road, causing slippage.

Another reason is the beauty.