2018 Lincoln Navigator Is Leaking Oil

Address Oil Leaks in Your 2018 Lincoln Navigator Effectively

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Reviewed by
Devin Cabugcal
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 Lincoln Navigator 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 Lincoln Navigator 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.

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 are the steps to diagnose the oil leak in a 2018 Lincoln Navigator?

To effectively diagnose an oil leak in your 2018 Lincoln Navigator, begin with a thorough visual inspection of the engine bay and the area beneath the vehicle, focusing on the oil pan, which is a common leak source. Next, check the oil level using the dipstick; a significant drop may indicate a leak. Inspect the oil filter and drain plug for any signs of oil seepage, as these areas are often overlooked. Additionally, examine the gaskets and seals around the engine for any wear or damage that could lead to leaks. If the source of the leak remains unclear, consider adding UV dye to the oil; this will help you pinpoint the leak when illuminated with a UV light. For a more comprehensive assessment, performing a pressure test can reveal leaks that may not be visible during a standard inspection. If these methods do not yield results, it is advisable to consult a professional mechanic for a thorough diagnosis and repair. By following this structured approach, you can systematically identify and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2018 Lincoln Navigator?

When dealing with oil leaks in a 2018 Lincoln Navigator, it's essential to understand the common culprits that may be at play. One frequent issue is a worn or damaged oil pan gasket, which can deteriorate over time and lead to significant leaks. Similarly, a faulty valve cover gasket can also cause oil seepage, making it crucial to inspect these components regularly. Another potential source of leaks is the oil filter; if it is loose or damaged, it can allow oil to escape from the engine. Additionally, the oil cooler lines may degrade over time, resulting in leaks that can compromise engine performance. Lastly, keep an eye on oil seals, such as the rear main seal or camshaft seals, as these can wear out and lead to oil leaks as well. Addressing these issues promptly is vital to prevent further engine damage and ensure the longevity of your vehicle. Regular maintenance and thorough inspections can help you catch these problems early, allowing for a more straightforward DIY repair process.

How urgent is it to address an oil leak in a 2018 Lincoln Navigator?

When dealing with an oil leak in a 2018 Lincoln Navigator, understanding the urgency of the situation is crucial. The severity of the leak plays a significant role; minor leaks may seem manageable, but major leaks can lead to substantial oil loss, risking engine damage if not addressed quickly. Oil is vital for lubricating engine components, and a leak can result in inadequate lubrication, increasing friction and wear over time, which ultimately compromises engine performance and longevity. Moreover, safety should never be overlooked; oil leaking onto hot engine parts can create fire hazards, making immediate attention essential. Regular maintenance and prompt action against oil leaks not only safeguard your vehicle's performance but also prevent more extensive and costly repairs in the future. Therefore, it is advisable to address any signs of an oil leak as soon as possible to ensure the safety and reliability of your Lincoln Navigator on the road.

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2018 Lincoln Navigator Oil Leak Causes & Repairs | RepairPal