What is the reason for oil leakage in the CV joint of a car's half shaft?
2 Answers
The reason for oil leakage in the CV joint of a car's half shaft is excessive wear. Symptoms of a damaged CV joint in a car's half shaft include: 1. Regular clicking noises during normal steering or when driving over bumps; 2. Loss of power in severe cases; 3. The vehicle pulling to one side while driving. CV joints are divided into: inner CV joints and outer CV joints. The inner CV joint connects to the transmission differential, while the outer CV joint connects to the wheel. The outer CV joint plays a role in power output and when the vehicle turns. The CV joint, also known as a constant velocity joint, connects the half shaft to the wheel and is a crucial component in the car's drivetrain. It ensures that power is continuously transmitted to the wheel in any direction, especially when the wheel jumps.
I'm an experienced auto repair technician, and CV joint oil leakage is a very common issue. It's mainly caused by aging or cracking of the dust boot, or loose clamps. When we drive over bumpy roads with lots of jolts, rubber components like CV joint boots become brittle and crack due to exposure to wind and sun. Sometimes, improper installation by mechanics or loose clamps can also cause leaks. The most troublesome case I've seen is when the CV joint itself wears out, flinging grease all over the axle shaft. If you notice oil stains on the inner side of the tire or hear clicking noises when turning, it's usually a CV joint problem. If not addressed promptly, dust and sand can enter the CV joint, causing the universal joint to fail quickly. I recommend replacing the dust boot early - it's just a matter of tens of yuan. If you delay until you need to replace the entire CV joint, it could cost several hundred yuan.
