How to Replace a Muffler

As cars and trucks travel down the road, they all have a different sound that emits from the exhaust. There are so many factors that come into play when it comes to the sound an exhaust makes: the design of the exhaust, the engine size, the tune of the engine, and most of all, the muffler. The muffler has more to do with the sound that the exhaust makes than any other component. You may want to change your muffler to get more sound from your vehicle, or you may want to change it to make it quieter due to a failure with your current muffler. No matter what the reason is, knowing what the muffler does and how it can be replaced can assist you in saving some money on replacing it.

Part 1 of 2: The purpose of the muffler

The muffler on the vehicle is designed to do just that: muffle the exhaust. When an engine runs with no exhaust or no muffler, it can be very loud and obnoxious. Mufflers are installed at the exit of the exhaust to make the sound of the vehicle much quieter. From the factory, some performance vehicles will seem to make more noise from the exhaust; this is typically due to its high flow design to assist in engine performance. There are two main reasons why people replace their mufflers.

To make the exhaust louder: Many people change their muffler to increase the sound of their exhaust. High performance mufflers are designed to allow for better flow from the exhaust, and have internal chambers that deflect the exhaust internally, causing more noise. There are a lot of different manufacturers out there that design mufflers for this application, and all of them will have a different sound.

To make the vehicle quieter: Some people will simply need to replace their muffler to repair a problem. Over time, it is common for many parts of the exhaust to wear out and rust. This can cause exhaust to leak from these holes, which in turn causes a wide array of loud and strange noises. When this occurs, the muffler will need to be replaced.

Part 2 of 2: Replacing the muffler

Materials Needed

Step 1: Park your vehicle on a flat, hard and level surface.

wheel chocks around tire

Step 2: Place the wheel chocks around the front tires.

floor jack being used on pinch weld

Step 3: Lift the vehicle using the floor jack. Lift the rear of the vehicle one side at a time using the factory lifting points.

Lift the vehicle high enough so that you can easily get underneath it.

jack stand placed under the factory lifting point

Step 4: Place the jack stands under the factory lifting points. Carefully lower the vehicle onto them.

muffler hanger with an arrow pointing to it

Step 5: Lubricate the muffler hardware. Spray a liberal amount of the silicone lubricant on the muffler mounting bolts and on the muffler rubber hanger.

Step 6: Remove the muffler mounting bolts. Using your ratchet and the appropriate socket, remove the bolts that connect the muffler to the exhaust pipe.

Step 7: Remove the muffle from its rubber hanger by pulling on it lightly. If the muffler doesn’t readily come free, you may need to use your pry bar to remove the muffler from the hanger.

muffler mounting arm within rubber hanger

Step 8: Install your new muffler. Place the muffler mounting arm into the rubber hanger.

muffler mounting holes

Step 9: Position the muffler. The mounting holes should be aligned with the exhaust pipe.

Step 10: Attach the muffler to the exhaust pipe mounting bolts. Install the bolts by hand and tighten them until they are snug.

Step 11: Lift the vehicle to take the weight off the jack stands. Using the floor jack, lift the vehicle high enough to be able to remove the jack stands.

Step 12: Remove the jackstands. Carefully lower the vehicle to the ground.

Step 13: Test your work. Start your vehicle and listen for any strange noises. If there are no noises and the exhaust is at your desired volume level, you’ve successfully replaced your muffler.

Deciding on the right muffler can be difficult, so it is important to research the one that you want and the sound you would like for it to make. Keep in mind also that some mufflers are only welded in, meaning that they need to be cut off and then welded into place. If your car has a welded muffler, or if you are not comfortable replacing your muffler yourself, a certified mechanic from YourMechanic can install your muffler for you.


Next Step

Schedule Exhaust Pipe/Tube Replacement

The most popular service booked by readers of this article is Exhaust Pipe/Tube Replacement. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Exhaust Pipe/Tube Replacement reviews

Excellent Rating

(171,627)

Rating Summary
161,099
5,644
1,174
834
2,876
161,099
5,644
1,174
834
2,876

Augie

31 years of experience
263 reviews
Augie
31 years of experience
Honda Accord L4-2.2L - Exhaust Pipe/Tube - Woodland Hills, California
Augie was fantastic. He gave me a call the night before to confirm our appointment, and we briefly talked about my issues with my car. He was extremely friendly upon arrival, and got straight to work. He talked me through everything he was doing, and answered any questions I had along the way. He found the problem and explained to me what was wrong, what he recommended to be replaced and why, and fixed my idle issue! He gave me a few tips for a quick question I had, and even topped off my clutch fluid!! Excellent customer service, will definitely book again for any issues, and recommend 10/10. Thanks Augie!

Lewis

16 years of experience
118 reviews
Lewis
16 years of experience
Jeep Wrangler V6-3.6L - Exhaust Pipe/Tube - Dallas, Texas
Very good experience. Would book again.

Joseph

27 years of experience
578 reviews
Joseph
27 years of experience
Honda CR-V L4-2.4L - Shock Absorber Replacement (Front, Rear) - Katy, Texas
Joe arrived at the scheduled time, was professional, and completed the work ahead of schedule.

Dante

36 years of experience
98 reviews
Dante
36 years of experience
BMW M3 L6-3.2L - Relay Rides Inspection - Cerritos, California

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How to Replace an EVP Position Sensor
The EGR valve is monitored by a valve position sensor. This sensor helps your car's EGR system to run more efficiently and better control emissions.
How to Avoid Muffler Repair
Mufflers break when debris builds in the undercarriage, the muffler rubs against driving surfaces, or there is smoke emitting from the engine.
How to Troubleshoot a Car Exhaust or Engine Noise
Car exhaust systems and car engines make whirring, clicking, or sputtering noises if there's a faulty belt, alternator, water pump, or tension pulley.

Related questions

Coolant blowing out tailpipe
Hi there. A coolant leak on the these GM vehicles is common due to failures in core plugs. Core plugs are holes where block castings are filled from, and sealed to keep coolant in. I would have a certified mechanic...
In nevada can you have straight pips on the truck with the cat on
You would need to check with a local exhaust shop for local laws on noise and if it is legal to do the exhaust from cat back with just straight pipes. Most states it is not legal.
I've been having issue with smoke coming out my exhaust now it's smoking from my converter
Your exhaust can get to over 500 degrees F. It should not be touched by hand or can cause burns. You should check to see if the coolant or engine oil is getting low to see if the engine has...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com