Why is my new catalytic converter making noise

The heat shield becomes loose when one of its bolts becomes loose and is broken, which causes the complete protection to be flexible. The other cause of rattling noise in the catalytic converter is the ceramic honeycomb structure that tends to break apart—the ceramic breaks due to wear and tear over time when using it.

It’s normal to pay more attention to the performance of a new part, especially one as expensive as a catalytic converter. A new catalytic converter can smoke because of the oil being burned off its exterior that was coated onto it to prevent rust before it left the factory or more briefly as the adhesive that was used to stick on a label is burned off.

New catalytic converter noisy? Break in period needed?


The flanges were machined poorly causing the joints to leak. If it was a generic or off-brand exhaust, I’m betting that is it. Even brand new, it should be quiet. There is no break in period. This is why I prefer welded exhaust parts. A good …

Repair the Heat Shield on the Catalytic Converter. As we mentioned before, a loose heat shield is one of the main causes of catalytic converter noise. To fix it, you have to remove the heat shield, which is very easy. All you must do is remove a few bolts and you may need a bit of penetrating oil because the bolts can be difficult to remove.

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How to tell if your catalytic converter is bad?

Symptoms of a Catalytic Converter Going BadHard to Start the Engine. If you find that you are constantly having difficulty getting up in the morning, you have a problem with your system.Failing Car Emission Test. If you brought in your car for an emission test and it failed, it could be the fault of the catalytic converter.Drop in Fuel Efficiency. …Triggered Check Engine Light. …

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What are the symptoms of a bad catalytic converter?

What Are Bad Catalytic Converter Symptoms?Engine Misfiring. The catalytic converter can overheat and show signs of failing when the engine misfires. …Loss of Power When Accelerating. Losing power during acceleration or going uphill is one of the most common clogged catalytic converter symptoms.Degraded Performance. …Reduced Exhaust System Performance. …Fuel Vapor. …Increased Emissions. …

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What does a bad catalytic converter sound like?

What does a bad catalytic converter sound like? Rattling Noises. Your catalytic converter consists of small, honeycomb-shaped components that can cause a rattling sound when broken. If your catalytic converter is broken, this rattling should be loudest when the car starts, and should get worse over time.

How do you know catalytic converter is bad?

Symptoms of a Bad or Failing Catalytic ConverterReduced Engine Performance. One of the first symptoms commonly associated with a bad or failing catalytic converter is a reduction in engine performance.Rattling Noise. Rattling noises from under the vehicle are another symptom of a bad or failing catalytic converter. …Sulfur Smell from Exhaust. …Check Engine Light Comes On. …Failed Emissions Test. …

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Rattling Catalytic Converter Video Answer

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