What are the reasons for car oil leakage?
3 Answers
Common oil leakage phenomena and reasons in cars: 1. Engine oil pan leakage. The required torque for the oil pan screws is not achieved, meaning they are not tightened properly; this commonly occurs after new cars undergo maintenance, resulting in engine oil leakage. Aging of the engine oil pan gasket leads to poor sealing. Related components such as a cracked or deformed engine oil pan are often caused by abnormal wear, car undercarriage impacts, or traffic accidents. 2. Valve cover leakage. Aging of the valve cover gasket results in poor sealing. A blocked crankcase ventilation port causes excessive pressure inside the crankcase. Due to the pressure difference between the inside and outside of the crankcase, engine oil leaks from weak points under high pressure, leading to oil leakage. 3. Brake fluid leakage. When you notice a significant increase in brake pedal travel, it is essential to carefully check for brake fluid leakage. Brake fluid leakage most commonly occurs in these areas: near the brake fluid drain holes of the four wheels, at the brake fluid reservoir, and at the brake pedal. Brake fluid leakage must be taken seriously as it directly relates to driving safety.
I've encountered oil leaks in cars several times. The most common issue is the aging of the oil pan gasket or loose screws under the engine. Over time, rubber components tend to harden and crack, allowing oil to seep out, leaving small puddles on the ground. Additionally, improperly installed or damaged oil filters can also cause leaks, especially if they're not tightened properly during an oil change. If the undercarriage is hit by rocks or obstacles, damaging oil line components, oil can leak heavily. It's advisable to regularly check parking spots for oil stains and inspect the oil pan and screws periodically. Replacing aged seals promptly can prevent major issues. If you notice an oil leak, don't ignore it—low oil levels can cause the engine to overheat and fail.
Last week, my car was leaking oil. After parking, I noticed a dark puddle of oil on the ground, which gave me quite a scare. Upon checking myself, I found that the transmission oil pipe fitting was loose, probably due to improper handling during the last maintenance. Looking back, the frequent high-speed driving vibrations likely caused the screws to loosen. Oil pump or gasket wear could also lead to leaks, especially in older cars with more issues. I quickly tightened the fitting and added new oil to avoid staining the garage and polluting the environment. A reminder to everyone: pay attention to unusual noises under the car or oil smells and fix them promptly, as small issues can turn into bigger, more expensive problems requiring part replacements. For manual transmission cars, regularly inspect the clutch area oil lines—prevention is key.
