Why Is My Car Leaking Oil?

If you've noticed oil spots under your car or a burning smell while driving around Dearborn, Detroit, or Southfield, Michigan, you might be dealing with an oil leak. While some leaks are minor, others can lead to serious engine problems if left unchecked. Understanding why your car is leaking oil and how to address it can help prevent costly repairs down the road, so our LaFontaine Kia of Dearborn team is here to help you know why your car is leaking oil and what next steps to take!

Common Causes of Oil Leaks

Oil leaks can occur for several reasons, with some being more common than others. One of the most frequent culprits is a worn or damaged gasket. Gaskets and seals, such as the valve cover gasket or oil pan gasket, are responsible for keeping oil contained within the engine. Over time, heat and pressure can cause these components to crack or degrade, leading to leaks.

Another possible cause is a loose or faulty oil drain plug. Every time you get an oil change, this plug is removed and reinstalled. If it's not secured properly or has worn threads, oil can seep out slowly. Similarly, an old or incorrectly installed oil filter can also contribute to leaks. If the filter isn't tightened properly or the gasket is damaged, oil may escape and drip onto the ground.

In some cases, oil leaks can indicate a more serious problem, such as a cracked engine block or cylinder head. While rare, these issues can result from overheating or manufacturing defects, requiring immediate attention from a professional.

How to Identify an Oil Leak

If you suspect your car is leaking oil, there are a few signs to look out for. The most obvious is spotting oil puddles under your vehicle after it has been parked for a while. Fresh engine oil is typically amber or light brown, while older oil may appear darker.

Another way to identify an oil leak is by inspecting the engine bay. If you notice oil residue around the valve cover, oil pan, or other components, it's a clear sign of a leak. You should also check your oil levels regularly. If the dipstick shows a sudden drop in oil despite no recent changes, you might have a leak.

A burning oil smell while driving is another red flag. If oil drips onto hot engine parts, it can create a noticeable odor or even produce smoke from under the hood. If you see smoke, pull over immediately and check for signs of a serious leak.

What to Do If Your Car Is Leaking Oil

If you suspect an oil leak, the first step is to confirm its source. Check under your car for oil spots and inspect the engine for visible leaks. While some leaks may seem minor, it's important to address them early before they lead to more significant damage.

Once you know where the leak is coming from, you'll then be ready to get the issue resolved. Unless you have experience with car repairs though, it's best to schedule an inspection with professionals like our service team.

One of our certified technicians can diagnose the leak, determine whether a simple gasket replacement or a more extensive repair is needed, and ensure your car is safe to drive. Regular maintenance, including timely oil changes and inspections, can also help prevent leaks before they start.