2020 Mercedes-Benz G63 AMG Engine Makes A Ticking Noise

Common Causes of Ticking Noises in Your 2020 Mercedes-Benz G63 AMG Engine and How to Address Them

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Reviewed by
Devin Cabugcal
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 2020 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 2020 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 are the potential causes of a ticking noise in the engine of a 2020 Mercedes-Benz G63 AMG, and how should I diagnose them?

When diagnosing a ticking noise in the engine of your 2020 Mercedes-Benz G63 AMG, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex issues. Start by checking the engine oil level, as low oil can lead to inadequate lubrication and result in ticking sounds. If the oil level is sufficient, inspect the valve train components for any signs of wear, as issues with lifters or valves can also produce similar noises. Next, examine the timing chain for proper tension; a loose or worn chain may be the culprit. Additionally, look for any exhaust leaks, as these can create ticking sounds that mimic engine issues. Don’t overlook the fuel injectors, as faulty ones can contribute to the noise, and ensure that your spark plugs are in good condition, as worn plugs can also lead to engine noise. By following this diagnostic approach, you can effectively narrow down the source of the ticking noise and take the necessary steps to resolve the issue.

What are the common causes of a ticking noise in the engine of a 2020 Mercedes-Benz G63 AMG?

When diagnosing a ticking noise in the engine of a 2020 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 engine sounds. Additionally, low engine oil levels can significantly contribute to this noise, as insufficient lubrication causes engine components to rub against each other, creating a ticking sound. Another potential source is an exhaust leak, particularly if it occurs near the engine, which can amplify the ticking noise. Furthermore, a faulty timing chain tensioner may also be responsible, as it can cause the timing chain to move erratically, resulting in a ticking sound. Lastly, malfunctioning fuel injectors can produce a similar noise when they fail to operate correctly. For those looking to address these issues themselves, it's essential to conduct a thorough inspection and consider checking oil levels, examining the valve train, and listening for exhaust leaks to pinpoint the exact cause of the ticking noise.

How urgent is it to address the ticking noise in the engine of a 2020 Mercedes-Benz G63 AMG?

Addressing a ticking noise in the engine of a 2020 Mercedes-Benz G63 AMG is of utmost urgency due to the potential risks associated with neglecting such symptoms. Early detection is crucial, as it allows for the identification of underlying issues before they escalate into more severe problems that could compromise engine integrity. Ignoring this noise may lead to costly repairs, as minor issues can develop into significant engine failures if left unattended. Furthermore, maintaining optimal engine performance is essential for the vehicle's efficiency and driving experience; a ticking noise could indicate a malfunction that hinders performance. Lastly, safety should always be a priority; unusual engine sounds can signal serious mechanical failures that pose risks to both the driver and passengers. Therefore, it is highly advisable to investigate and resolve any ticking noises promptly to ensure the longevity and safety of your G63 AMG.

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