How to Fix an Oil Leak Under Your Car

Mechanic looking for an oil leak 

An oil leak under your car is a common issue that can be fixed with the right tools and a little know-how. While not usually an emergency, oil leaks should be addressed promptly to avoid engine damage. If you notice oil pooling or smell burning oil, it's time to investigate. Here's a quick guide on how to fix oil leak under car and some tips to prevent future issues.

What Causes Car Oil Leaks?

There are several reasons your car might develop an oil leak. Common causes include worn gaskets or seals, which degrade over time and crack, leading to leaks. A loose oil drain plug from an oil change can also result in leaks, as can cracks in engine components like the oil pan, valve covers, or cylinder head.

A damaged or improperly installed oil filter is another potential culprit, along with overfilled oil, which creates excess pressure that can cause leaks in seals or gaskets. Pinpointing the exact cause of the leak is the first step toward learning how to fix an oil leak under your car effectively.

How to Fix an Oil Leak Under Your Car

Learning how to fix an oil leak under your car can be a manageable DIY project if you proceed carefully and methodically. Here's a step-by-step guide to help you get your car back in working order.

Step 1: Prepare the Vehicle

Before beginning the repair, ensure you're in a safe and clean environment:

  • Park on a Level Surface: Make sure the car is on a stable surface to avoid any accidents.
  • Use a Jack and Jack Stands: If you need to lift the car to access the leak, make sure it's securely supported by jack stands.
  • Wear Protective Gear: Oil can be messy, so wear gloves and safety glasses.

Once the car is safely secured, you can begin the inspection and repair process.

Step 2: Locate the Leak

The next step in how to fix oil leak under car is to locate the exact source of the leak. To do this:

  • Look for Oil Stains: Inspect areas around the oil filter, oil pan, valve covers, and drain plug for signs of oil residue.
  • Use a Flashlight: A flashlight can help you see better in dark or hard-to-reach areas.
  • Clean the Engine: If the engine is too dirty, clean it with an engine degreaser. Once it's dry, you'll have a better chance of identifying the leak.

The leak may be coming from a cracked engine component, a worn gasket, or even a faulty oil filter.

Step 3: Replace Gaskets or Seals

Once you've identified the source of the leak, the most common fix is replacing the worn gasket or seal. Here's how to do it:

  • Drain the Oil: Before working on the engine, drain the oil into an oil pan.
  • Remove the Faulty Component: Depending on the location of the leak, this could involve removing the oil pan, valve cover, or oil filter. Use the appropriate tools, such as a wrench or socket set, to remove the parts.
  • Inspect for Damage: Check the components for any cracks or signs of wear. If the part is damaged, it must be replaced.
  • Replace the Gasket or Seal: Install a new gasket or seal in the exact position of the old one. Be sure to tighten the bolts to the manufacturer's recommended torque specifications.
  • Reassemble the Parts: Once the new gasket or seal is in place, reassemble the components. Ensure everything is securely tightened and that no parts are missing.

After the repairs are done, you're ready to refill the engine with oil.

Step 4: Reassemble and Test

The final step in how to fix oil leak under car involves reassembling the engine and testing the repair:

  • Refill with Oil: Add the correct amount and type of oil for your car.
  • Start the Engine: Turn on the car and allow it to run for a few minutes. This will help circulate the oil and check for any signs of leaks.
  • Inspect the Repair: Look closely around the repaired area to ensure the leak is gone. If you notice any oil leaking, you may need to repeat the process or check for a more serious issue.

If everything looks good, you've successfully learned how to fix an oil leak under your car.

Tools and Supplies Needed

To address an oil leak under your car, you'll need the following tools and supplies:

  • Jack and jack stands (for safely lifting the car)
  • Wrench or socket set (to remove components like the oil pan or valve cover)
  • Oil drain pan (to catch the draining oil)
  • New gasket or seal (specific to the leak)
  • Oil filter wrench (if replacing the oil filter)
  • Engine degreaser (for cleaning the engine)
  • Flashlight (to help you see better in tight spaces)
  • Rubber gloves and safety glasses (to protect yourself)

Preventative Maintenance Tips

Preventing oil leaks is easier and more cost-effective than learning how to fix an oil leak under your car after it happens. Here are some key maintenance tips to help you avoid future leaks:

Regular Oil Changes

Changing your oil at the recommended intervals is crucial for keeping your engine in good shape. Fresh oil ensures that your engine parts are properly lubricated, helping prevent unnecessary wear on seals and gaskets. Make sure to follow the manufacturer's recommendations for oil change intervals.

Checking for Wear and Tear on Gaskets and Seals

Regularly inspect the gaskets and seals under your hood. If you notice any signs of wear, cracks, or leaks, replace them before they lead to bigger problems. Routine inspections during oil changes can catch these issues early.

Importance of Routine Inspections

Routine inspections are essential for catching potential issues before they become serious problems. Pay attention to any oil stains under your car or burning oil smells while driving. If you notice any of these symptoms, have your car checked out immediately. Early detection and repair of an oil leak can save you from expensive repairs down the road.

Fix Your Oil Leak at Colonial Chevrolet in New London, CT

If you're not comfortable learning how to fix an oil leak under your car or if the leak is more complicated than anticipated, the expert technicians at Colonial Chevrolet in New London, CT, can help. Our service department is equipped with the tools and experience to quickly identify and fix oil leaks, so you can get back on the road with confidence.

We offer oil changes, gasket replacements, and a range of other services to keep your engine running smoothly. If you've noticed oil leaks or other issues with your vehicle, don't hesitate to reach out to us. Schedule an appointment or visit our service center to have your car serviced by trusted professionals.