2018 Land Rover Discovery Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2018 Land Rover Discovery and How to Address Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2018 Land Rover Discovery is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Land Rover Discovery is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What steps should I take to diagnose the oil leak in my 2018 Land Rover Discovery?

To effectively diagnose an oil leak in your 2018 Land Rover Discovery, begin by locating the leak, which involves checking for visible signs of oil on the ground beneath your vehicle. Once you have a general area, inspect the engine components, focusing on the oil pan, valve cover gasket, oil filter, and oil drain plug for any signs of leakage. It's also crucial to check the oil level, as a significant drop may indicate a leak. Pay special attention to the oil filter, as a damaged or improperly installed filter can lead to leaks. Additionally, examine the oil pan for cracks and inspect all gaskets for wear or damage. If the source of the leak remains elusive, consider using UV dye in the engine oil, which can help pinpoint the leak when viewed under a UV light. If these steps do not yield results or if the problem appears complex, seeking assistance from a professional mechanic or a Land Rover service center is advisable to ensure a thorough diagnosis and repair. By following this structured approach, you can efficiently identify and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2018 Land Rover Discovery?

When diagnosing oil leaks in a 2018 Land Rover Discovery, it's essential to understand the common problems that may arise. One frequent culprit is the oil pan gasket, which can degrade over time, leading to leaks that can compromise engine performance. Additionally, worn valve cover gaskets are another common issue; as they become brittle and cracked, they allow oil to escape from the top of the engine. The oil filter housing gasket is also prone to damage, and a faulty gasket here can result in significant oil loss. Furthermore, oil cooler lines can develop leaks due to wear and tear, contributing to the overall problem. Lastly, a damaged rear main seal can lead to oil leaks at the back of the engine, which can be particularly challenging to address. By being aware of these potential issues, DIYers can take proactive steps to inspect and repair their vehicle, ensuring optimal performance and longevity.

How urgent is it to address the oil leak in my 2018 Land Rover Discovery?

Addressing an oil leak in your 2018 Land Rover Discovery is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. An oil leak can lead to a significant loss of engine oil, which is essential for lubricating moving parts. Without adequate lubrication, the engine can suffer from increased friction, leading to severe damage and costly repairs. Moreover, neglecting an oil leak can compromise your vehicle's performance and efficiency, resulting in decreased fuel economy and power. The safety implications are equally concerning, as leaking oil can drip onto hot engine components, creating a fire hazard. By promptly addressing an oil leak, you not only protect your investment but also ensure the safety of yourself and others on the road. Regular monitoring and timely repairs are key to maintaining the health and longevity of your Land Rover, making it imperative to act swiftly when you notice any signs of an oil leak.

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