DIY Tips on How to Fix an Exhaust Leak without Welding

Dealing with an exhaust leak could be challenging. If you don’t know where the exact leak point is, fixing the leak could be trickier than expected. Even if you can’t locate the leak, there’s a high chance you’ll find it hard to patch without the right info.

And if there’s an emergency, you’ve got to know how to fix an exhaust leak without welding.

Lots of bad stuff could stem from a leaky exhaust, that’s why you’ve got to pay a lot more attention. Using non-welding techniques could be a difference-maker that’ll undoubtedly plump your DIY skills.

If you’re keen on tip-top performance from your engine, your exhaust has to release fumes from only one source.

And to get quality, DIY tips could also pose a challenge. Quality facts and correct set of steps ensure you get a non-leaky pipe.

What to Expect

In this tell-all review, you’ll get direct access to three proven ways to fix an exhaust pipe without a welding kit. These methods range from temporary to long-lasting.

Also, you’ll get quality information geared towards answering all questions you might have related to leaky exhausts. And with this info combo, your exhaust pipe won’t give out fumes from unintended channels.

Causes of Exhaust Leakages


After several years of piping hot fumes out your engine, an exhaust pipe leak is inevitable. Sudden changes in temperature, along with substantial deposits from the vapours gradually corrode this pipe.

Low-lying pipes

If your car is designed a little lower than others, it’s the probable cause for a leak lying under your pipes.

Speed breakers and rough terrain can quickly get your pipe leaking in several spots after repeated hits.

Checking Out the Problem

NOTE: When checking out where a leak is on your exhaust, don’t use a jack. Ensure your vehicle is on a flat surface and employ wheel ramps and other sturdy supports instead. Your life is worth more than a leaky exhaust pipe, so do be careful.

Where to Begin

Fixing your exhaust pipe just right has to begin with you checking out where the leak is coming from. Follow these steps for an effortless fix;

Exhaust’s link with car engine

Your exhaust’s manifold is the first point to check out for a leak. Manifold links with car engines differ. Your car may have just one massive pipe or a collection of pipes connected to the engine. If there’re no apparent leaks or creases, you’ve got to progress.

Turbochargers or catalytic convertors

Check out turbochargers or any catalytic convertors underneath your vehicle. These encourage the unhinged flow of exhaust fumes from your engine. There could be multiple convertors on your vehicle, depending on its make.

Inspect these parts for any apparent leaks. Also, ensure you check out hard-to-see areas using a mechanic’s mirror.

DIY Exhaust Leak Repairs

Method A: Epoxy

If you’ve got small leaks around your vehicle, a simple dash of epoxy can do the trick. But a lot of steps are involved to ensure the hole stays closed for longer. Check them out for an effortless exhaust leak repair;

Step 1: Assess the damage

There’re some limitations to using epoxy for fixing exhaust leaks. A wider exhaust leak may be impossible to cover with epoxy.

Exhaust leaks not exceeding 5mm can be easily handled with epoxy. Also, when using epoxy for some connectors on your exhaust line, both parts have to be a little flush.

Step 2: Use a hard brush on the leaky surface

Hard brushing the surface around your leaky exhaust removes mud, dirt, and grime. Cleaning the entire area around your leaky pipe encourages more adhesiveness.

After cleaning with a hard brush, sand the affected part down if you’ve got any sandpaper. Sanding down improves your epoxy’s adhesion potential to the exhaust.

Step 3:Clean surface with acetone

If you’ve got acetone, get a little of it on a dry cloth. Clean up the entire area around the newly-sanded surface. Nail polish remover will work just as well if you don’t have a can of acetone. Cleaning with nail polish remover or acetone helps the exhaust leak stick a lot better.

Step 4: Apply epoxy

Get the epoxy mixed after you’ve prepared the leaky exhaust because this adhesive dries up in moments.

Generously apply the epoxy over the affected surface. Check out the curing period of your chosen epoxy glue. Some epoxy may cure within a few seconds. Some others may take up to three minutes to get dried.

Method B: Exhaust Repair Tape

Exhaust repair tapes are ideal for fixing leaks a little larger than the ones mendable with epoxy. This method also involves the first three steps of the epoxy repair technique, damage assessment- hard brushing – cleaning with acetone.

After these steps, get the exhaust tape wrapped around the leaky pipe several times. Also, ensure the tape spreads out a few inches from the leak point at both ends.

Method C: With a Patch

Large leaks could be visible to the naked eye, making them a lot easier to spot. To get a perfect patch, you can get beer cans. If you’ve got a thin sheet of aluminum, this could work too.

  • After cleaning the leak area through hard brushing, sanding, and applying acetone, size the patch up. Apply epoxy over the leak. Get epoxy over a wider leak’s edges if you can’t cover it up.
  • Rub a little epoxy on the patch’s area that’ll stick onto the pipe. Get epoxy over the patch’s edges after joining with the tube.
  • You can also use clamps for much larger leaks. Get these clamps on both edges and tighten with a screwdriver.

Where a Replacement, Rather than a Repair is Advisable

Aged Compartments

When several parts of one channel linked to your exhaust are visibly aged and rusty, consider getting a full replacement. Fixing old and rusty exhaust pipes may not last as long as you’d wish. And it’ll be a lot challenging to get these parts fixed as time goes on.

Long-Term Use

If you plan on using your car for interstate or very long trips, consider replacing the damaged parts of your exhaust.

DIY repairs of your car’s exhaust will last a while, but not as long as a total replacement of affected parts.


What does an exhaust leak sound like?

A leaky exhaust’s sound depends on its location on the pipe. A cracked exhaust closer to the engine is more likely to get noticed due to its hissing tone. A leak closer to your exhaust outlet will sound like a hum. More unusual sounds can also sound like a hotrod in some cases.

The sounds keep getting worse after every time your car gets used.

Can I use duct tape to fix an exhaust pipe leak?

You should refrain from using duct tape to fix an exhaust leak.

Can you drive with an exhaust leak?

Driving with an exhaust leak is not advised. You could get your engine damaged when regularly using it with a leaky exhaust.

Apart from your vehicle’s engine, other parts of your vehicle could take a hit with an apparent leak.

Can an exhaust leak cause loss of power?

Yes. An exhaust leak could result in a loss of power on many vehicles. But in most cases, such holes are likely to be massive as compared to smaller seepages.

What problems can an exhaust leak cause?

  • Excess combustion, leading to too much fuel use
  • Carbon monoxide poisoning
  • A decrease in fuel efficiency
  • Harsh sounding noise
  • Speedy exhaust deterioration
  • Too much pressure on your car’s engine
  • Higher emission rate
  • Decreased acceleration

Is an exhaust leak easy to fix?

An exhaust pipe could be easy to fix, but this depends on the leak’s enormity. Smaller holes can be handled with zero expert help. But much larger leaks may need a pro maintenance specialist.

How long does it take to fix an exhaust leak?

It could take within thirty minutes to an hour for a DIY exhaust fix. Getting your exhaust fixed at a repair shop may take a lot longer. Some challenging repairs could last up to three hours or more.

Will exhaust leak hurt engine?

An exhaust leak may hurt your engine. With your exhaust leaking from a hole other than its fume end, your car’s engine could work harder than usual. If your engine works harder for longer, there’s a chance your

Will an exhaust leak throw a code?

Cars with computers are likely to display a code signifying an exhaust leak. If you notice a leak code, get your exhaust a thorough investigation if you’re planning a DIY. But if you need it fixed at an auto repair shop, get there as fast as you can.

How much will it cost to fix an exhaust pipe?

If your catalytic convertor or turbocharger isn’t damaged, you may not have to spend more than $600. But with a broken part, expect to pay from around $800 to over $1000 to get a proper fix.

Final Word

As you’ve seen, how to fix an exhaust leak without welding isn’t as tricky as earlier imagined. With the tips provided right here, you can get your exhaust functioning, as usual, ensuring you get a lot more mileage before a full repair.

Know that these methods will help your car’s proper function for a few months. Start thinking about a full replacement before another repair is needed.