2018 Jeep Grand Cherokee Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2018 Jeep Grand Cherokee and How to Fix 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 Jeep Grand Cherokee 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 Jeep Grand Cherokee 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 steps should I take to diagnose the oil leak in my 2018 Jeep Grand Cherokee?

When diagnosing an oil leak in your 2018 Jeep Grand Cherokee, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by locating the leak; inspect the area beneath your vehicle for any oil drips or puddles, as well as any visible oil stains on the engine or surrounding components. Next, check the oil level to determine if it is significantly low, which could indicate a leak. Pay close attention to the oil filter and drain plug, as these are common culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals around the engine, such as the valve cover and oil pan gaskets, for signs of wear or damage. If the source remains elusive, consider adding UV dye to the oil, which can help illuminate the leak under a UV light. For more complex issues, performing a pressure test on the oil system can pinpoint leaks in the lines or fittings. If these methods do not yield results, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the oil leak in your Jeep.

What are the common causes of oil leaks in a 2018 Jeep Grand Cherokee?

When diagnosing oil leaks in a 2018 Jeep Grand Cherokee, it's crucial to understand the common culprits that may be at play. One of the primary issues 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, often noticeable around the engine's top. Another frequent source of leaks is the oil filter; if it is loose or improperly installed, it can allow oil to escape from the engine. Additionally, physical damage to the oil pan itself can result in cracks that lead to leaks. Lastly, the various oil seals within the engine can degrade over time, contributing to oil loss. Addressing these issues promptly is essential not only for maintaining engine performance but also for preventing further damage. Regular inspections and maintenance can help you catch these problems early, allowing for effective DIY repairs.

How urgent is it to address the oil leak in my 2018 Jeep Grand Cherokee?

Addressing an oil leak in your 2018 Jeep Grand Cherokee is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components, which may result in severe damage over time. Furthermore, neglecting this problem can cause the engine to overheat, as the lack of proper lubrication prevents it from functioning efficiently, potentially leading to costly repairs or even complete engine failure. The safety risks associated with an oil leak cannot be overlooked either; oil dripping onto hot engine parts poses a fire hazard, making it crucial to act swiftly. By promptly addressing the oil leak, you not only protect your vehicle from further damage but also ensure its optimal performance and longevity. Therefore, it is essential to prioritize this issue and take the necessary steps to resolve it as soon as possible.

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