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2022 Challenger Scat Pack - Annoying Exhaust Rattle/Drone at Low RPMs

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Laura J. · rep 0 · May 22, 5:39 AM · 1 replies · solved · Question

Vehicle: 2022 Dodge Challenger Scat Pack

What's up, Mopar fam!

I've got a 2022 Dodge Challenger Scat Pack, and I've been noticing a really annoying rattling sound coming from underneath the car, specifically around the exhaust system. It's most prominent at lower RPMs, especially when I'm accelerating lightly or cruising around 1500-2000 RPMs. It almost sounds like a metallic vibration or drone.

It's definitely not the glorious Hemi rumble I'm used to! I've tried looking underneath, but it's hard to pinpoint exactly where it's coming from. There's no check engine light, and performance seems fine, but this rattle is driving me nuts. The car has only about 15,000 miles on it.

Has anyone else with a Scat Pack or similar Challenger experienced this? What should I be looking for? Could it be a loose heat shield or something else simple?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:39 AM

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ClearTheCode admin answer:

An annoying exhaust rattle or drone at specific RPMs in a 2022 Dodge Challenger Scat Pack is a common complaint, often due to minor issues that can be easily addressed. While it's not typically a performance-affecting problem, it can certainly detract from the driving experience.

Common Causes of Exhaust Rattle/Drone:

  1. Loose Heat Shields: This is by far the most frequent culprit. Heat shields, designed to protect the undercarriage from exhaust heat, can become loose over time due to corrosion, broken welds, or missing fasteners. They vibrate against the exhaust pipes or chassis.
  2. Exhaust Hangers/Mounts: Worn, broken, or improperly installed exhaust hangers can allow the exhaust system to sag or contact other components, causing rattles.
  3. Loose Exhaust Clamps/Connections: Joints in the exhaust system (e.g., where the mid-pipes connect to the manifolds or mufflers) can sometimes loosen, allowing for slight movement and rattling.
  4. Internal Muffler/Resonator Baffle Failure: Less common, but internal components within a muffler or resonator can break loose and rattle around.
  5. Catalytic Converter Shielding: Similar to heat shields, the protective casing around catalytic converters can sometimes loosen.
  6. Contact with Chassis/Suspension: If the exhaust system is slightly misaligned or has sagged, it might be making contact with the vehicle's frame, driveshaft, or suspension components, especially during engine torque or vibrations.

Diagnostic Steps:

  1. Visual Inspection (Cold Engine): With the car safely lifted (or on ramps), visually inspect the entire exhaust system. Pay close attention to all heat shields, exhaust hangers, and connection points. Try to gently shake and tap different sections of the exhaust to see if you can replicate the rattle.
  2. Engine Running Inspection: With the engine running (and safely supported/chocked), have someone gently rev the engine to the RPM range where the rattle occurs while you're underneath (use extreme caution and proper safety gear). This can help pinpoint the source.
  3. Check for Contact Points: Look for any shiny spots or rub marks on the exhaust pipes or adjacent chassis components, indicating where contact is being made.

When to See a Shop:

If you're uncomfortable working under the vehicle or can't pinpoint the source of the rattle, a reputable exhaust shop or a Dodge dealership can quickly diagnose and fix the issue. They have lifts and experience with these types of noises. It's usually a straightforward repair, often involving tightening fasteners, replacing a hanger, or re-securing a heat shield.

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