What Causes Engine Oil Leaks?
2 Answers
Generally speaking, the causes of engine oil leaks in automobiles include damage to the engine cylinder gasket, oil pan gasket, or sealing rings; failure of the crankshaft front and rear oil seals or camshaft oil seals; loose fastening screws; or aging of the oil cooler and oil filter base sealing gaskets. Valve Cover Oil Leak: This occurs more frequently in vehicles around 5 years old and requires replacement of the valve cover gasket. Engine Oil Pan Leak: If the oil pan sealing gasket is aged, the oil pan needs to be removed to replace the sealing gasket and reapply sealant. Crankshaft Oil Seal Leak: Replacing the crankshaft oil seal is a labor-intensive operation that involves extensive disassembly and high labor costs. If the leak is not severe (such as minor seepage), it may be advisable to postpone repairs.
I find that oil leaks are quite common in cars. As an ordinary car owner with years of driving experience, I've encountered several oil leakage issues. The most frequent cause is the aging or cracking of the oil pan gasket. Rubber materials harden and crack over time, allowing oil to seep out directly. Another common issue is the oil filter not being installed properly or having loose connections, especially if the bolts weren't tightened properly during an oil change. Wear and tear on the oil pump's sealing ring can also lead to significant leaks, noticeable as oil stains under the car after parking. An oil leak isn't just a minor inconvenience—low oil levels can lead to insufficient engine lubrication, potentially causing part failures or even fires. That's why I check the engine compartment and the ground beneath my car every two weeks. Keeping these areas clean helps in early detection. During regular maintenance, I always choose reputable shops for high-quality oil and parts, avoiding cheap alternatives to minimize the risk of leaks from the start. If I spot an oil leak, I stop driving immediately and call for a tow to a professional repair shop to get it checked out.
