What Causes Engine Oil Leakage in Cars?
3 Answers
The causes of engine oil leakage in cars are: 1. Leakage from the front and rear crankshaft oil seals; 2. Poor sealing of the radiator gasket; 3. Poor sealing or aging of the oil filter base gasket; 4. Aging or damage to the oil pan gasket; 5. Aging or damage to the timing cover; 6. Loose or damaged drain plug; 7. Poor sealing of the valve cover gasket. The solutions for engine oil leakage are: 1. Replace the damaged sealing ring; 2. Identify the leakage point and clean the oil traces at the leakage site; 3. Tighten loose bolts and replace damaged accessories. The functions of engine oil are: 1. Cooling and temperature reduction; 2. Sealing and leakage prevention; 3. Cleaning and purification; 4. Shock absorption and buffering; 5. Lubrication to reduce wear; 6. Rust and corrosion prevention; 7. Protection of components.
Having driven for decades, the most common cause of oil leaks is the aging or cracking of the oil pan gasket. Prolonged exposure to high temperatures makes the rubber brittle and ineffective, causing oil to slowly seep out. Oil leaks can also occur if the oil filter isn't tightened properly or is damaged, especially if it loosens right after an oil change. Damage to the front or rear crankshaft oil seals can lead to significant oil leakage, a common issue in older car models. Valve cover gasket leaks are also frequent, with summer heat exacerbating the problem. Ignoring oil leaks can reduce oil levels, leading to severe engine piston wear and increasing the risk of spontaneous combustion. I must remind you to regularly check the ground for oil stains after parking, frequently use the dipstick to monitor oil levels, and immediately visit a professional repair shop upon detecting any leaks. I've seen friends learn the hard way by saving small repair costs only to face major engine repairs later.
As a car DIY enthusiast, I maintain my car myself. Oil leaks are usually caused by sealing issues. The oil pan gasket aging and cracking, or improper installation of the oil filter not being tightened properly can cause oil to leak. A failed crankshaft oil seal often leads to significant leakage, like in my old car where the rubber deteriorated quickly under high temperatures. A loose oil pan drain plug is also a common cause. Ignoring oil leaks can lead to engine damage due to oil depletion. I recommend using a light to inspect the bottom of the engine for oil traces and trying to tighten screws if possible. If there are multiple leak points, it's safer to take it to a repair shop. I always insist on regular oil checks to avoid major overhauls.
