How to Make Car Muffler Quieter: Tips and Tricks to Try

If you can hear your car exhaust going off while driving, you can rest assured that those outside of the vehicle have it much worse. Luckily, even if your car is older or has an extra loud exhaust, you can still make it quieter by getting a quality muffler.

But if the muffler itself starts malfunctioning, you will need to bring your A-game to ensure your car is as soundless as possible. Below, I’ll cover all the tricks you can use to deal with a noisy muffler. Read on, and take notes!

Why Are Some Exhausts So Loud and How Do Mufflers Help?

Typically, loud car exhausts are simply too old. As a result, they make more noise than newer models, usually due to the rust that accumulates inside of them, or due to their otherwise deteriorating state.

Another possibility is that your car is too powerful, as more power usually equals more noise. In such cases, using quality soundproofing materials to muffle the sound is the way to go.

That’s where mufflers come in — let’s see how they can help you.

Car Exhaust Mufflers

To ensure their exhaust systems do not emit so much noise they disturb everyone or even break the law, most people install exhaust mufflers. These handy devices lengthen the pathway the air in the exhaust system has to travel through. As a result, they make the exhaust pipes a lot quieter.

However, mufflers age, get damaged, and may even require some updates in terms of soundproofing. Here are all the ideas you can use in case your muffler hasn’t been performing up to your standards.

Fix Any Possible Leaks

As I have already mentioned, mufflers are a tried and true tool for fixing a loud exhaust, and it is easy to see why. They can absorb a great chunk of the exhaust noise and help your car go almost entirely soundlessly.

However, when mufflers get old or damaged, they lose their ability to perform effectively. In most cases, this damage presents itself in the form of holes. Regardless of their size, such leaks can cause a lot of high-pitched noise as the air travels through them.

Luckily, all you need to fix your muffler is heat-resistant epoxy. By purchasing an epoxy stick, you will be able to apply it seamlessly and seal any holes, no matter how small they might be.

The change will be immediate: as soon as the epoxy dries, your muffler will be back to performing at its best, and your car exhaust will be a lot quieter.

Buy a New Muffler

Sometimes, fixing your muffler — sealing the holes or other signs of damage — simply isn’t feasible. For example, if the damage is too extensive, the more reasonable course of action is to purchase a new muffler. However, to ensure the muffler doesn’t actually hinder your car’s performance, you will have to do thorough research before settling on a particular option.

The parameters you will have to keep track of include the muffler type, size, and material. I go into a lot more detail on each of them in this muffler guide, so check it out on your quest to finding the best one.

Now, I’d prefer for a professional mechanic to handle the muffler replacement for me. It is a rather delicate affair, and you risk doing more harm than good by tinkering with it on your own. However, if you have experience, you can try to do it yourself.

In case you decide to buy an excellent muffler, you will indeed have to splurge. However, if you want to get good results without spending too much money, you can also try soundproofing the muffler you already have.

Use Soundproofing Materials

Great manufacturers pack their mufflers with quality soundproofing materials. That way, they ensure the mufflers can absorb as much noise as possible while still allowing your car to keep its usual performance.

Now, if you’re well-versed in cars, you can do the very same thing to a cheap or older muffler. For instance, you can try stuffing it with fiberglass packing, steel scrubs, or even metal wool. The key is to pick a heat-resistant material that also has soundproofing abilities.

Once again, I wouldn’t recommend tinkering with your muffler in this manner if you have never done anything similar before. It is better not to DIY it if you don’t really know what you are doing.

Buy or Make a Muffler Silencer

Aside from a muffler, a silencer is another handy tool that can make your entire exhaust system quieter. You can look at it as a classic weapon silencer — you slip it onto the exhaust pipe, and it narrows the path that the air travels down. As a result, the air makes a lot less noise.

Fortunately, this particular part is rather easy to install, and you can do it with zero experience. The most important thing is finding the right model for your particular muffler and exhaust pipe, which most car shop employees can help you with.

And if you want to save money, you can also try making the silencer by yourself. Naturally, doing so comes with particular risks, as closing the pipe on your own can lead to an obstruction and endanger both you and your vehicle.

Still, you can attempt sealing the pipe with a can, preferably from soda or sparkling water. You will have to drill some holes into the bottom to ensure the air has somewhere to escape. Plus, you ought to stuff the can with a soundproofing material once more, and it has to be heat-resistant.

Once again, doing this kind of repair comes with certain dangers, so I don’t recommend using it as a permanent fix. However, it is worth a try if you just need a quieter muffler or exhaust for a short period, after which you’ll buy a new silencer or otherwise repair what’s amiss.

Install a Muffler Baffle

Another device that can help make your muffler quieter is a baffle. This tiny piece of hardware is quite effective at silencing the exhaust pipes, as it redirects and absorbs the air that travels through them.

You can buy a baffle both for the exhaust and the muffler, depending on the advice from your mechanic. Once more, it is essential to purchase the right model for your vehicle, so that the device does not hinder the car’s performance.

The great thing about this type of repair is that it is neither too costly nor difficult. There are countless baffle kits on the market, like for example this one, that contain everything you need to safely replace or install one for the first time.

Of course, you can also have a professional install the baffle. It is definitely the safest option, and the best way to ensure you will actually pick the right one for your vehicle.

To Sum Up

And there you have it — that’s how you can fix up a malfunctioning car muffler. Most of the time, simply sealing any leaks will be enough to ensure your exhaust system is quieter once more. However, in case of more extensive damage or aging, you can also soundproof your muffler, pair it with a silencer or baffle, or purchase a completely new model.

To make the best decision for your vehicle, it is wise to ask for professional help as soon as your muffler problems begin. That way, you will save yourself both time and money and get your car back and running quickly.

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