Why Is There Oil Leaking Under My Parked Car?
Noticing a dark stain on your driveway or parking spot can be a worrying sight, because you know your vehicle may be leaking vital motor oil. Oil leaks are a common issue for many car owners, and though they may seem like a minor problem at the time, they can quickly lead to more serious engine damage if left to drain the engine of the oil it needs to stay lubricated and protected. So, what could be causing your oil leak, and how should you handle getting it fixed?
Worn-Out Gaskets and Seals
The most common causes of oil leaks we see are worn or damaged gaskets and seals. These small rubber or metal parts are designed to prevent oil from escaping the system. Gradually, they can become brittle, crack, or degrade due to high temperatures and age.
Valve Cover Gasket
Located on top of the engine, this gasket seals the valve cover and prevents oil from leaking out. After gradual wear over time, oil may be noticed around the edges of the engine or on the ground.
Oil Pan Gasket
Responsible for holding the vehicle’s oil supply, the oil pan is located at the very bottom of the engine, susceptible to the many elements that could degrade its gasket, including extreme heat/cold, road salt, and water. A damaged oil pan gasket can allow oil to leak, which is often noticeable after the car has been parked for a while.
Front and Rear Main Seals
These seals prevent oil from leaking out of the engine at its front and rear. If these seals fail, oil may drip down the side of the engine and create a noticeable puddle.
Oil Drain Plug Issues
The oil drain plug is located at the bottom of the oil pan and is used to drain oil during service. If the drain plug is improperly tightened or if the gasket around it has worn out, oil can leak from this area. This issue is often noticed shortly after an oil change when the technician fails to adequately tighten it, but it can occur regardless if the plug has been damaged.
Damaged Oil Filter
The oil filter is responsible for protecting your engine from contaminants, and stopping debris before it can reach your engine. If the oil filter is not installed correctly, or is damaged, it can leak oil. Over-tightening or under-tightening the filter during installation are both common reasons for faulty oil filter sealage.
If oil is leaking around the filter, it could be a sign that it’s not properly installed or the gasket is damaged. You may notice a greasy residue on or around the filter or a small puddle of oil underneath the car.
Cracked Oil Pan
The oil pan holds a large amount of oil, and while it’s designed to be durable from the factory, it can become cracked or punctured over time due to road debris, accidents, or corrosion from water and road salt. If your oil pan is cracked, it will leak oil gradually as the car runs, often leaving a large puddle under the vehicle and depriving your engine of the oil it needs to operate.
Leaking Timing Cover
The timing cover seals in oil, protecting the timing belt or chain as it continuously runs. If the gasket that seals the timing cover has worn down or experienced damage, it can allow oil to leak from this area. Although less common than some other oil leak sources, a timing cover leak can be serious if left unchecked, as it can lead to low oil levels around one of the most important parts of your engine.
The Wrap Up
Oil leaks can be caused by a variety of issues, from worn gaskets to damaged oil pans or filters. While some leaks may be small and manageable in short periods of time, others can lead to significant engine problems if not addressed as soon as possible. If you notice oil under your car, it’s essential to get your vehicle to a trusted automotive professional so the leak can be identified and repaired.
Oil Services in Austin, Texas
Notice a leak or experiencing oil loss? At Edgestone Automotive in Austin, Texas we specialize in diagnosing and repairing oil leaks to keep your vehicle running smoothly. Give us a call or schedule online today!