2018 Mercedes-Benz G63 AMG Is Leaking Oil

Address Oil Leaks in Your 2018 Mercedes-Benz G63 AMG Effectively

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Reviewed by
Aisha
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 Mercedes-Benz G63 AMG 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 Mercedes-Benz G63 AMG 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 Mercedes-Benz G63 AMG?

To diagnose an oil leak in your 2018 Mercedes-Benz G63 AMG, 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 filter, oil pan, valve cover gasket, and oil drain plug, as these are common culprits. It's also essential to check the oil level in your engine; a significant drop may indicate a leak. Pay special attention to the oil filter to ensure it is properly installed and undamaged, as well as the oil pan for any signs of wear or leaks. The valve cover gasket should also be examined for oil seepage, and the oil drain plug must be securely tightened to prevent leaks. If these steps do not reveal the source of the leak or if the problem appears more complex, consulting a professional mechanic is advisable for a thorough inspection and accurate diagnosis. By following this structured approach, you can effectively identify and address oil leaks in your vehicle, ensuring it remains in optimal condition.

What are the common causes of oil leaks in a 2018 Mercedes-Benz G63 AMG?

When dealing with oil leaks in a 2018 Mercedes-Benz G63 AMG, it's crucial to understand the common culprits that may be at play. One frequent issue is the degradation of the oil pan gasket, which can occur over time due to the heat and pressure within the engine, leading to leaks. Additionally, worn-out valve cover gaskets are another common source of oil seepage, as they can deteriorate with age, allowing oil to escape from the top of the engine. Another area to inspect is the oil filter housing gasket; if this component is faulty, it can result in oil leaks around the oil filter area. Furthermore, leaking oil cooler lines, particularly at their connections, can also contribute to oil loss. Lastly, cracked or damaged oil seals, especially those surrounding the crankshaft or camshaft, can lead to significant leaks. Addressing these issues promptly is essential to maintain the vehicle's performance and prevent further engine damage, making regular inspections and maintenance vital for any DIY enthusiast looking to keep their G63 AMG in top shape.

How urgent is it to address the oil leak in a 2018 Mercedes-Benz G63 AMG?

Addressing an oil leak in a 2018 Mercedes-Benz G63 AMG is of utmost urgency due to the serious implications of neglecting this issue. An oil leak can lead to a critical loss of lubrication, which is essential for the engine's smooth operation. Without adequate lubrication, the engine is at risk of overheating, which can result in catastrophic damage to vital components. Furthermore, ignoring an oil leak can escalate into more severe mechanical failures, potentially leading to costly repairs or even complete engine failure. Safety is another paramount concern; leaking oil can create fire hazards if it comes into contact with hot engine parts, posing a significant risk to both the vehicle and its occupants. Additionally, timely maintenance not only ensures the vehicle's performance but also helps preserve its resale value, as prospective buyers are often deterred by known mechanical issues. Therefore, it is crucial to address any signs of an oil leak immediately to safeguard the vehicle's integrity, ensure safety, and maintain its value over time.

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2018 Mercedes-Benz G63 AMG Oil Leak Causes & Diagnosis