2018 Nissan TITAN Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2018 Nissan TITAN and How to Address Them Effectively

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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 Nissan TITAN 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 Nissan TITAN 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.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

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 initial steps to diagnose an oil leak in a 2018 Nissan TITAN?

To effectively diagnose an oil leak in your 2018 Nissan TITAN, start by locating the leak. Position yourself under the vehicle and look for any visible signs of oil, such as drips or puddles beneath the engine or transmission. Once you have identified the area, check the oil level in the engine to ensure it is not critically low, as a significant drop may indicate a serious leak. Next, inspect the oil filter and drain plug for any signs of leakage or looseness; tightening the drain plug or replacing a damaged oil filter can often resolve minor issues. Additionally, examine the gaskets and seals around key engine components, including the valve cover and oil pan, for wear or damage that could be contributing to the leak. If the source remains elusive, consider adding UV dye to the engine oil, which can help you trace the leak more accurately with a UV light. Should these steps not yield results, it may be wise to consult a qualified mechanic for a professional diagnosis. By following this structured approach, you can efficiently identify and address the oil leak in your Nissan TITAN.

What are the common causes of oil leaks in a 2018 Nissan TITAN?

When dealing with oil leaks in a 2018 Nissan TITAN, it's crucial to understand the common culprits that may be at play. One frequent issue is the deterioration of the oil pan gasket, which can wear out over time, leading to leaks. Similarly, valve cover gaskets are prone to wear and can also result in oil escaping from the engine. Another area to inspect is the oil filter housing gasket; if this seal fails, it can create leaks around the oil filter. Additionally, the rear main seal, located at the back of the engine, can deteriorate and cause oil to leak from that area. Lastly, the seals around the oil cooler may degrade, contributing to oil leaks. By regularly inspecting these components, DIY enthusiasts can catch potential issues early, ensuring the engine remains in optimal condition and preventing further damage.

How urgent is it to address the oil leak in my 2018 Nissan TITAN?

Addressing an oil leak in your 2018 Nissan TITAN is not just a matter of convenience; it is crucial for maintaining the safety and performance of your vehicle. Ignoring even a minor leak can escalate into a more severe problem, leading to significant engine damage and costly repairs. The urgency of the situation often correlates with the severity of the leak; a rapid loss of oil can compromise engine lubrication, resulting in overheating and potential engine failure. Additionally, warning lights on your dashboard should never be ignored, as they serve as critical indicators of underlying issues that could affect your vehicle's health. Beyond mechanical concerns, oil leaks pose environmental risks, contaminating soil and water sources, which makes prompt action essential. For DIY enthusiasts, while it may be tempting to delay repairs, understanding the long-term implications of neglecting an oil leak is vital. A thorough inspection and timely intervention can save you from more extensive damage and ensure your Nissan TITAN remains reliable and safe on the road.

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