Jeep Commander Engine Is Making A Knocking Sound

Diagnosing the Causes of Knocking Noises in Your Jeep Commander Engine and Recommended Solutions

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Low Oil Level or Pressure
0%
25% chance it's the
Dirty or Old Oil
0%
20% chance it's the
Internal Engine Components
0%
25% chance it's
Something else
The most common reasons a Jeep Commander engine is making a knocking sound are low oil level or oil pressure, dirty or old oil, or worn internal engine components.
  • Low Oil Level or Pressure: A low oil level or pressure can result from oil leaks, worn engine components, or a failing oil pump, leading to inadequate lubrication and potential engine damage.
  • Dirty or Old Oil: A buildup of contaminants and degradation of oil over time can lead to reduced lubrication and engine wear.
  • Internal Engine Components: Worn or damaged internal engine components can lead to decreased performance, increased oil consumption, and unusual noises from the engine.
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.

Troubleshooting Knocking Sounds in a Jeep Commander

When troubleshooting knocking sounds in a Jeep Commander, it's crucial to take a methodical approach to identify the root cause of the issue. Begin by checking the oil level and condition, as insufficient or contaminated oil can lead to engine knocking. If the oil appears satisfactory, the next step is to inspect the ignition system for any misfires or timing discrepancies, which can also contribute to knocking noises. Additionally, evaluate the rod bearings and knock sensors, since a malfunctioning knock sensor may trigger warning lights and indicate more serious problems. If the vehicle has been stationary for a while, consider cleaning the engine to remove any sludge buildup, which could help reduce noise. Pay close attention to any clunking sounds during acceleration, as these may point to issues with the transmission, engine mounts, or driveshaft components. Specifically, the front differential isolator bushings are known to wear out and can be a common source of clunking. By systematically addressing these potential issues, you can effectively diagnose and resolve the knocking sounds in your Jeep Commander, leading to improved performance and a quieter driving experience.

What Could Cause a Knocking Sound in a Jeep Commander?

When diagnosing a knocking sound in your Jeep Commander, it's crucial to consider several common problems that could be at play. One of the primary culprits is low oil levels, which can lead to insufficient lubrication and result in engine knocking. Additionally, ignition issues, such as faulty spark plugs or ignition coils, can disrupt the combustion process, causing knocking sounds. Timing problems, where the engine's timing is off, can also contribute to this noise, as can worn or damaged rod bearings that may produce a distinct knocking sound when the engine is running. Furthermore, malfunctioning knock sensors can fail to detect and adjust for knocking, allowing the issue to persist. Beyond these, factors like poor fuel quality, carbon buildup in the engine, or incorrect ignition timing can exacerbate the problem. It's also worth checking for issues with the transmission, engine mounts, or driveshaft components, as these can create similar knocking noises. Addressing these potential causes promptly is essential to prevent further damage to your vehicle and ensure a smooth driving experience.

Why is Your Jeep Commander Engine Knocking and What Should You Do?

When your Jeep Commander’s engine starts knocking, it’s crucial to act swiftly, as this symptom can indicate serious underlying problems that, if left unaddressed, may result in costly repairs or even complete engine failure. Ignoring the knocking sound can lead to further complications, such as damaged rod bearings or compromised engine components, which not only jeopardizes your vehicle's performance but also poses safety risks while driving. It’s essential to first assess the situation by checking the oil levels and quality, as low oil can exacerbate knocking issues. If the knocking correlates with engine RPM, it may suggest a rod knock, while changes in sound with vehicle speed could point to other mechanical problems. Additionally, if the check engine light is illuminated, retrieving diagnostic codes can provide valuable insights into the issue. Given the potential severity of engine knocking, seeking professional assistance is often the best course of action to ensure a thorough diagnosis and effective resolution, ultimately safeguarding your vehicle’s longevity and your safety on the road.

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