🔊 Why Your Exhaust Is Making a Loud Roaring Noise — Common Causes
🔊 Why Your Exhaust Is Making a Loud Roaring Noise — Common Causes
By Andrews Car Centre – Exhaust Repair Experts in Lincoln
Has your car suddenly started sounding like a race car — but not in a good way? A loud roaring noise from your exhaust isn’t just annoying — it’s usually a sign something has gone wrong.
At Andrews Car Centre in Lincoln, we diagnose and repair exhaust problems every day. Here’s what might be causing that roar — and why you shouldn’t ignore it.
🚨 Common Causes of a Loud Roaring Exhaust
1. Exhaust Leak or Hole
The most common cause is a hole or crack in the exhaust system, often from:
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Rust and corrosion (especially on older cars)
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Stone or debris damage
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Failed gaskets or seals
When there’s a leak, exhaust gases escape before they’re properly silenced — creating a loud, harsh sound.
2. Blown Silencer (Back Box)
The rear silencer (also called the back box) helps reduce noise levels before gases exit the tailpipe. If it fails internally or develops holes, you’ll hear a deep, booming or roaring noise.
3. Broken or Detached Exhaust Mounts
If an exhaust hanger or mount breaks, the system can hang lower and vibrate. You might hear a roar, plus:
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Rattling underneath
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Clunks when going over bumps
4. Failed Catalytic Converter
A damaged or internally broken catalytic converter can cause extra noise and sometimes a metallic rattling or roaring. It can also lead to power loss and failed emissions tests.
5. Modified or Aftermarket Exhaust Parts
If your car has a non-standard exhaust (e.g., aftermarket sports exhaust), it may naturally be louder. But if the noise has recently changed, it could still indicate a fault.
⚠️ Why You Shouldn’t Ignore It
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MOT Failure: A loud or damaged exhaust will usually fail an MOT on noise or emissions.
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Safety Risks: Leaks can let exhaust fumes (like carbon monoxide) into the cabin.
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Further Damage: Vibrations or leaks can damage other parts of the exhaust or engine bay.
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Fines: Excessive noise can result in fines under UK road regulations.
🛠️ How We Fix It at Andrews Car Centre
At our Lincoln workshop, we offer:
✅ Fast leak repairs or full replacements
✅ Catalytic converter repairs and replacements
✅ New silencers and back boxes (OE-spec or aftermarket options)
✅ Honest advice — no upselling
We’ll only replace what’s necessary, and we stock parts for most makes and models to get you back on the road quickly.
📍 Book an Exhaust Check in Lincoln
If your exhaust sounds louder than normal, don’t wait for it to fail completely — or fail your MOT.
👉 Call now, book online, or visit Andrews Car Centre on Dixon Street, Lincoln for a free exhaust inspection and expert repairs.
🔍 Related Searches We Help With:
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Loud exhaust fix near me
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MOT fail exhaust noise
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Back box replacement Lincoln