What causes oil leakage under the engine?

[ODaniela]

The reasons for oil leakage under the engine are: 1. Damage to the oil pan gasket or loose screws; 2. The rear crankshaft oil return thread is clogged with dirt. The methods to address engine oil leakage include: 1. Inspect or replace the engine oil filter; 2. Replace the valve cover gasket; 3. Remove the engine timing cover and apply sealant; 4. Tighten or replace the oil drain plug; 5. Replace the oil pan sealing gasket and apply sealant; 6. Replace the crankshaft oil seal. Engine maintenance methods are: 1. Use qualified engine oil; 2. Use qualified coolant and antifreeze; 3. Regularly clean the radiator scale; 4. Regularly remove carbon deposits from the engine. The function of the engine is to convert the thermal energy of gasoline or diesel into mechanical energy by burning the fuel in a sealed cylinder, causing the gas to expand and push the piston to perform work.

[VincentDella]

When I find oil leaking under the engine, I always suspect several common issues. It could be that the oil pan gasket has aged and cracked, as rubber components tend to become brittle and leak over time. Also, if the oil filter isn't tightened properly or is misaligned, it can cause seepage—remember to check for oil stains around the filter connection. Additionally, damaged seals like the crankshaft rear oil seal or timing chain cover can allow oil to seep through gaps and drip down. This is more common in older vehicles, and regular replacement of rubber gaskets can prevent it. Ignoring oil leaks can lead to insufficient oil levels, increased engine wear, or even engine stalling. I recommend cleaning the oil stains on the ground, running the engine for a few minutes to observe the source, using a light to pinpoint the leak, and then taking it in for repairs.

[AdalynnLee]

My car also had an oil leak before, leaving a stain in the parking lot. After inspection, it was found that the oil pan gasket was deformed. Replacing it with a new gasket solved the problem. Engine oil leaks usually have simple causes: cracked seals, loose oil filter screws, or a damaged oil pan. New cars might have assembly issues, and leaks can occur after prolonged driving on bumpy roads. Don't underestimate it; low oil levels can trigger high-temperature engine alarms, doubling repair costs. I've also found that regularly checking for oil stains under the car is a good habit, helping to detect issues early and save money and time. Developing small inspection habits, like squatting down to check the chassis for leaks every month, can prevent minor issues from becoming major problems.

[AbigailDella]

Oil leaks are mostly caused by seal failures. Rubber components like the oil pan gasket and crankshaft oil seal can start leaking as they age. It could also be due to a loosely installed filter or cracks in the oil pan. If you notice oil stains, don't wait—take your car to a repair shop immediately. Insufficient lubrication from low oil levels can lead to engine damage, resulting in much costlier repairs. Pay attention to the condition of these parts during maintenance, as simple upkeep can prevent major issues.