2021 Mercedes-Benz G63 AMG Engine Makes A Ticking Noise

Common Causes of Ticking Noises in Your 2021 Mercedes-Benz G63 AMG Engine and How to Address Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
12% chance it's the
Exhaust Leak
0%
88% chance it's
Something else
The most common reasons a 2021 Mercedes-Benz G63 AMG engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak.
  • Exhaust Leak: A damaged exhaust manifold or a loose connection in the exhaust system can cause an exhaust leak, resulting in increased noise and potential loss of engine power.
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 2021 Mercedes-Benz G63 AMG engine makes a ticking noise?

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.

If the drive belt idler pulley fails, there will be a very audible chirping noise from the front of the engine. This is because the idler pulley bearing is no longer smooth, and rotating causes metal to grind at high speeds. If it is not changed immediately, there is a chance it will become dislodged, or allow the drive belt to slip off. If the belt falls off, the accessory that it drives will no longer function. For instance, if the alternator belt idler pulley fails, the alternator may stop functioning. Also if the pulley begins to wobble, allowing slack in the belt, it will make an extremely loud squeaking or screeching noise, especially on cold starts. This is the belt slipping on the crankshaft pulley, and will require belt replacement once the idler pulley is replaced.

If the drive belt tensioner fails, there will be a very audible chirping, grinding, or rattling noise from the front of the engine. This is because the tensioner pulley bearing is no longer smooth, and rotating causes metal to grind at high speeds. If it is not changed immediately, there is a chance it will become dislodged, or allow the drive belt to lose tension, or break. If the belt falls off, the accessory that it drives will no longer function. Also, if the tensioner spring fails, allowing slack in the belt, it may make an extremely loud squeaking or screeching noise combined with a rattle as the tensioner bounces back and forth under load. The squealing noise is the belt slipping on the crankshaft pulley, and will require belt replacement once the belt tensioner is replaced.

An engine leaking oil does not always make a puddle on the ground. A burning smell may be noticed from the front of the vehicle after driving. This is because engine oil leaks may fall onto hot engine components, especially the exhaust manifold, and burn off before making it to the ground. This poses a risk to the engine because the leak going unnoticed may deplete the engine oil reserve, and lead to an oil starvation issue. Some engine oil leaks only occur while the engine is running, so the leak may be larger than the small spot on the ground makes it seem.

Noises can be accompanied by many annoying or worrisome sensations. Consider the noise of grinding brakes, the noise sounds much like the brake pedal and steering wheel feel. This is important, as random noises can be difficult to replicate without knowing when the sound occurs, what must be done to make the sound, and what sound it is. Any professional technician can replicate and diagnose most noises, but to ensure the vehicle is more quickly diagnosed, make sure you tell your technician these three pieces of information.

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 could be causing the ticking noise in the engine of a 2021 Mercedes-Benz G63 AMG?

When faced with a ticking noise in your 2021 Mercedes-Benz G63 AMG, it's crucial to adopt a systematic diagnostic approach to identify the underlying issue. Start by checking the engine oil level, as low oil can lead to insufficient lubrication, causing components to rub together and create a ticking sound. If the oil level is adequate, inspect the valve train for any signs of wear, particularly the lifters and valves, which can contribute to the noise if they are not functioning properly. Next, examine the timing chain tensioner; a malfunction here can prevent the timing chain from maintaining proper tension, resulting in a ticking sound. Additionally, look for any exhaust leaks, as escaping gases can produce similar noises. Lastly, consider the fuel injectors, as a malfunctioning injector can also generate a ticking sound during operation. By following this methodical approach, you can effectively narrow down the potential causes of the ticking noise and determine whether a simple fix or professional assistance is required.

What are the common causes of a ticking noise in the engine of a 2021 Mercedes-Benz G63 AMG?

When diagnosing a ticking noise in the engine of a 2021 Mercedes-Benz G63 AMG, it's crucial to consider several common problems that could be at play. One of the primary culprits is valve train issues, which may arise from worn lifters or camshaft lobes, leading to irregular sounds during engine operation. Additionally, low engine oil levels can significantly contribute to this noise, as insufficient lubrication causes metal components to rub against each other, creating a ticking sound. An exhaust leak, particularly near the engine, can also manifest as a ticking noise, often mistaken for internal engine issues. Furthermore, a faulty timing chain tensioner may produce a similar sound due to the chain's movement around the gears. Lastly, malfunctioning fuel injectors can generate a ticking noise when they fail to operate correctly. To effectively address these issues, it is advisable to consult a qualified mechanic who can accurately diagnose the problem and recommend appropriate repairs, ensuring the longevity and performance of your vehicle.

How urgent is it to address the ticking noise in the engine of a 2021 Mercedes-Benz G63 AMG?

Addressing a ticking noise in the engine of a 2021 Mercedes-Benz G63 AMG is a matter of urgency that should not be overlooked. Early detection is crucial, as it can prevent minor issues from escalating into major engine problems that could lead to costly repairs or even complete engine failure. The ticking sound may indicate low oil levels, worn-out components, or valve train issues, all of which require immediate attention to avoid further damage. Ignoring this symptom can compromise the vehicle's performance and reliability, making it essential for DIY enthusiasts to act promptly. While some may feel tempted to delay repairs, the risks associated with neglecting such noises can outweigh the initial inconvenience. Therefore, if you notice a ticking sound, it is advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose the issue accurately. Following the manufacturer's maintenance schedule can also help mitigate these risks and ensure the longevity of your G63 AMG.

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