How to Replace the Muffler on Cars

by Contributing Writer; Updated June 12, 2017

Because of the cradle width on most jack stands, you'll probably need to pad the cradles with wooden blocks to prevent damage to the body panels when supporting the car. Chock the front wheels and raise the rear, using a floor jack under the rear towing hook. Install the rear jack stands under the rear jacking points, then raise and support the front at the front jacking points. Never work under any vehicle without using jack stands.

Under The Hood:

 How to Replace the Muffler on a Dodge Ram

Crawl underneath your Dodge Ram at the rear of the truck to inspect your muffler. See if you can spot any holes or severe rust spots causing holes, or loose hangers. This lets you know if you need a new muffler.

Purchase a muffler for a Dodge Ram. Most auto parts stores stock and sell quality mufflers. Make sure you get the correct muffler that corresponds with the year of your truck. You can also consider purchasing a used muffler from a junk yard, but the quality will not be as good or as reliable as a new one.

Jack up the truck and place it on four jack stands if possible. Although you tend to have a lot of room underneath a Dodge Ram, the clearance needed for pipes when removing and installing a muffler is sometimes more than what's available when the truck is on the ground.

Spray the fasteners holding the muffler to the truck generously with a penetrating lubricant before you loosen them. The penetrating lubricant will help you to remove the screws and bolts with ease.

Remove the old muffler by removing the nuts from the U-bolts that hold the muffler in place. Don't be surprised if the bolts break due to rust and/or age. You should never reuse these bolts, so even if they don't break, replace them all.

Replace the new muffler on your Dodge Ram Truck. Line it up as straight as possible with the clamps and then tighten the bolts to hold it in place. Make sure you connect the muffler with the muffler hangers that come with it and use only parts designed for your truck. Tighten all bolts securely, but not so tight the muffler doesn't have any give during regular driving.

Start the engine and check the new muffler for any leaks or loud sounds. If there are any, then you may need to tighten the clamps more.

Items you will need

  • New or used muffler

  • Penetrating spray lubricant

  • Crescent wrench

  • Sledge hammer

 How to Replace the Muffler on a Dodge Caravan

Determine if you need a new muffler on your Dodge Caravan by looking under the van towards the back to see if there are any small or large holes in the muffler or to determine if it has fallen off partially or completely. Severe rust spots that are wearing through to form holes is another sign you should replace the muffler.

Purchase a muffler for a Dodge Caravan. It should have a 5 inch inlet/outlet, 24 inch body, and be 31 inches overall. You can purchase either a new muffler or a used muffler; however, new mufflers are more reliable than used mufflers.

Place an old blanket or a large piece of cardboard on the ground beneath the rear part of the Caravan. You can also put the van on jack stands if desired. This often makes it much easier to remove the muffler and work more comfortably.

Examine the old muffler. Spray the fasteners and nuts generously with a penetrating lubricant before you loosen them. Also spray lube on all clamp bolts and connecting points of the exhaust system. The penetrating lubricant will help you to remove the screws and bolts with ease.

Disconnect the tail pipe from the muffler assembly. Then, take off all nuts and clamps connecting the exhaust pipe to the muffler to remove the muffler.

Clean the exhaust and tail pipes where they will connect to the new muffler with a wire brush. Replace broken insulators and any that look worn. You'll also look for worn supports or other attaching parts and replace those as well.

Assemble the muffler loosely, but wait to tighten the clamps and bolts until you're sure it's aligned correctly. Make sure all tabs are securely in place. Tighten the nuts on the clamps that connect the muffler to the tail pipe with 28 ft-lb torque. Tighten the nuts on the clamps that connect the muffler to the exhaust pipe with 25 ft-lb torque.

Lower the van, start the engine and check the new muffler for any leaks or loud sounds. If there are leaks or loud sounds, then you may need to tighten the clamps more

 How to Replace the Muffler on an Acura Integra

Crawl under the car and check to see if the muffler has a welded installation or a clamped installation. A clamped installation will have bolts that hold the muffler in place. A welded installation will not have any bolts.

Remove the bolts with the screwdriver or wrench if the muffler is clamped on. If you are unfortunate enough to have a welded muffler, purchase an exhaust cutting tool or a blow torch to remove it.

Position yourself under car to replace the muffler. You may want to place a piece of cardboard or an old blanket on the ground so that you are not lying on the ground. You do not need to use jacks to replace the muffler.

Remove the old muffler from the car. You can simply bang it off of the car using a sledge hammer. You can also use a hand saw to remove it if necessary.

Compare the old tail pipe with the new one. You may have to saw off some of the tail pipe so that it closely measures about the same as the old one. You don't want your tail pipe sticking out too far.

Install the new muffler on your Acura Integra. Line it up straight with the clamps and then tighten the bolts to hold it in place. The bolts shouldn't be too tight-you want the muffler to move slightly to prevent damage.

Items you will need

  • New or used muffler

  • Old blanket or a piece of large cardboard

  • Screwdriver or wrench

  • Sledge hammer

  • Hacksaw

 How to Replace the Muffler on a Pontiac Grand Am

Check to see if you need a new muffler on your Pontiac Grand AM by looking under the car towards the back. Visually check for holes in the muffler or determine if it has fallen off. Check for rotted spot welds and seams and inspect the hangers to see if they're loose.

Purchase a muffler made with a 2.25-inch center inlet/outlet, is 4 inches thick x 9.75 inches wide and has a 13-inch case length made from aluminized steel. Buy the muffler that correctly corresponds with the year of your Grand Am.

Place an old blanket or a large piece of cardboard on the ground beneath the rear of the Grand Am. You can put the rear part of the car onto jack stands, if desired, to make the job easier.

Remove the old muffler. Loosen any bolts around the muffler with a wrench and take the muffler off. If the muffler is welded on, then you can break it away by knocking it with a sledge hammer or sawing it off with a hacksaw. Dispose of the old muffler properly by breaking it down into small parts. Put the small parts in a trash bag and throw them away.

Install the new muffler on your Pontiac Grand Am. Line it up straight with the clamps and then tighten the bolts to hold it in place. The bolts should not be too tight because the muffler needs to move slightly to prevent damage. Don't put it on too loosely or it may fall off.

Start the engine and check the new muffler for any leaks or loud sounds. If there are leaks or loud sounds, then you may need to tighten the clamps more. Read the muffler installation instructions to answer any other questions you may have.

Items you will need

  • New or used muffler

  • Jack stands or blanket

  • Wrench

  • Hack saw

  • Sledge hammer

  • Trash bag

 How to Replace the Muffler on a Chevy Impala

Spread out an old blanket or a large piece of cardboard on the ground to lay on as you replace the muffler. For an easier time repairing, you might consider jacking the car up and placing it on jack stands instead.

Purchase a new muffler. It must have a 2.25-inch center inlet/outlet, be 4 inches thick by 9.75 inches wide, and 13 inches long. Make sure it is the right one according to the model year of your vehicle.

Look over the old muffler. Spray the fasteners generously with a penetrating lubricant before you loosen them. The penetrating lubricant will help you to remove the screws and bolts with ease.

Loosen the bolts at the bottom of the muffler strap. It's okay to let the muffler hang. Using a hacksaw, saw the stock muffler completely off of the pipe, leaving 1 inch to 1 1/2 inches of straight pipe at the muffler inlet, if you have a single pipe system. Alternately, if you have a dual pipe system, take of the U-bolt clamp found on the front of the muffler and remove the muffler from the exhaust pipe.

Take of the tailpipe clamps and then remove the tailpipe. After taking off the muffler and tailpipe, inspect all the hangers and replace any that are damaged.

Put the muffler into place under the vehicle. Make sure the muffler inlet slips over the exhaust pipe with ease. Put sealer on the connecting surfaces and then straighten the muffler over the pipe. Tighten the muffler clamp on the muffler inlet using a flathead screwdriver and then tighten all clamps starting at the front of the muffler and working you're way back.

Lower the car, start the vehicle and carefully inspect the muffler for leaks and loud sounds. If there are any, you'll need to tighten the bolts more. However, the clamps should be loose enough to allow the muffler to move a little with the movement of the car.

Items you will need

  • Old blanket or large piece of cardboard

  • New muffler

  • Penetrating lubricate

  • Flathead screwdriver

 How to Replace the Muffler on a Chevy Cobalt

Verify your Chevy Cobalt needs a new muffler by looking under the car towards the back. The muffler will be a large, round piece at the end of a long pipe. If there are holes in the muffler or if it's missing, you must install a new one.

Purchase a new or used muffler. The same muffler will fit all Cobalt models. It should have a 2.25-inch center inlet/outlet. Plus, the width will measure 9.75 inches wide and the length measuring 13 inches long, and it's made from aluminized steel.

Place an old blanket or a large piece of cardboard on the ground beneath the rear part of the Cobalt. This will provide a place to lie on the ground as you replace the muffler. It isn't necessary to lift the truck up on a jack or car lift, but it can make it easier to repair.

Remove the old exhaust system. Loosen any bolts around the muffler and take the muffler off. If the muffler is welded on, you can trying breaking it free with a sledge hammer if it's already loose; otherwise, use a hacksaw to cut it free.

Compare the old muffler against the tail pipe of the new muffler. Saw off some of the new tail pipe with a hack saw, if it's too long. You don't want your tail pipe sticking out too far. Put on the exhaust tip on the end of the pipe.

Install the new muffler on your Chevy Cobalt. Line it up straight with the clamps and then tighten the bolts to hold it in place at the back end of the muffler. Tighten all clamps and bolts around the muffler. The bolts should not be too tight because the muffler needs to move slightly to prevent damage; however, they need to be tight enough to prevent the muffler from falling off.

Items you will need

  • New or used muffler

  • Old blanket or piece of cardboard

  • Screwdriver or a wrench

  • Sledge hammer

  • Hacksaw

 How to Replace the Muffler on a Chevy Silverado

Verify you need a new muffler on your Silverado by looking under the truck towards the back to see if there are holes in the muffler or the exhaust system has fallen off. Or, you may have determined it needs a new muffler because it's running loudly or making gunshot sounds.

Purchase a muffler made of aluminized steel with a 3-inch center inlet and offset outlet 5-inch by 10-inch by 13-inch case. Be sure to purchase the muffler that corresponds to the model and model year of your Silverado.

Place an old blanket or a large piece of cardboard on the ground beneath the rear part of the Silverado. This will allow you to replace the muffler comfortably without lying on the ground. You can also choose to put the rear of the truck up on jack stands for an easier repair in case the pipes are really long.

Remove the old exhaust system. Loosen any bolts around the muffler and take the muffler off. If the muffler is welded on instead of held by clamps, you might be able to break if free using a sledgehammer. Alternately, you can use a hacksaw to cut it free.

Install the new muffler on your Chevy Silverado. Line it up straight with the clamps and then tighten the bolts to hold it in place. The bolts should not be too tight-you want the muffler to move slightly to prevent damage as the truck moves.

Start the engine and check the muffler for any leaks or loud sounds. If there are leaks or loud sounds, you may need to adjust the clamps or tighten the bolts on the clamps.

 How to Replace the Muffler on a Honda Accord

Removal

Let the exhaust system cool completely. Using a ratchet and socket, remove the muffler heat shield, exhaust pipe heat shield and catalytic converter heat shield bolts and self-locking nuts. Discard the nuts as you will be installing new ones later. Remove the muffler tip retainer bolt, using a ratchet and socket. Slide the tip off the muffler outlet pipe.

Follow the exhaust pipe forward to the first joint flange at the catalytic converter. Apply penetrating oil to the bolts and let them soak for at least 10 minutes. Using a breaker bar, socket and wrench, remove the bolts and nuts from the flange.

Working your way towards the rear of the car, unhook the exhaust and muffler supports from their rubber isolation mounts. Support the muffler as you unhook the last mount, then lower the assembly from beneath the car.

Peel the old gasket from the catalytic converter flange and discard it. Inspect the flange for carbon deposits and clean it as necessary, using a gasket scraper and wire brush. Wipe off any remaining penetrating oil with a clean rag.

Installation

Install a new gasket in the catalytic converter flange. Raise and support the new muffler assembly, and hook it on the rubber mounts.

Install the catalytic converter flange bolts and new self-locking nuts. Using a torque wrench, socket and wrench, torque the new nuts to 25 foot-pounds. Install the catalytic converter heat shield and torque the bolts to 7.2 foot-pounds, using a torque wrench and socket.

Engage the edge of the exhaust pipe heat shield with the retainer clip, then install and torque the new self-locking nuts to 7.2 foot-pounds. Install the muffler heat shield and muffler tip, then the torque the retainer bolts to 7.2 foot-pounds. Lower the car and start the engine. Listen for evidence of an exhaust leak at the catalytic converter.

Items you will need

  • Ratchet

  • Socket set

  • Penetrating oil

  • Wrench set

  • Scraper

  • Wire brush

  • Clean rags

  • New exhaust gasket

  • 5 new self-locking nuts

  • Foot-pound torque wrench

 How to Replace a Muffler on a Honda

Back your Honda onto a set of car ramps, or raise the car with a hydraulic jack and place jack stands under the rear frame rails on each side. Lower the hydraulic jack so that the car’s weight is resting on the jack stands, not the hydraulic jack.

Crawl under the rear of the vehicle and locate the muffler and tail pipe assembly on the passenger side of the car. Loosen and remove the two bolts that hold the muffler assembly to the exhaust pipe with an 8 mm wrench turned in a counterclockwise direction. Remove the bolts and the small springs behind the bolts and set them aside.

Locate the rubber muffler mounts that attach the muffler assembly to the car body at the rear of the vehicle. Pry the rubber mounts off the mounting studs on the car body with a flat screwdriver. Lower the rear of the muffler assembly while sliding it toward the rear of the car. Remove the assembly from under the vehicle and discard it or place it aside.

Install a new rubber muffler mount by placing the mounting hole on one end of the mount onto the mounting stud on the rear of the new muffler assembly and sliding it into place. Repeat this step if your Honda muffler uses two rubber mounts.

Place the new muffler assembly under the vehicle with the tail pipe facing the rear of the car. Lift up on the front of the assembly and slide it over the rear axle. Lift the front of the muffler assembly and push the two rubber mounts you installed earlier onto the mounting studs on the rear of the car until they are fully seated.

Line up the mounting holes in the front of the muffler assembly to the mounting holes on the exhaust pipe ahead of the rear axle. Place the small springs over the ends of the muffler mounting bolts and thread the bolts into the mounting holes through the muffler assembly and into the exhaust pipe. Tighten the bolts with an 8 mm wrench in a clockwise direction.

Drive the car off the car ramps, or raise the car with a hydraulic jack and remove the jack stands from under the frame rails. Lower the car and remove the hydraulic jack from under the car.

Items you will need

  • 2 car ramps

  • Hydraulic jack

  • 2 jack stands

  • Wrench, 8 mm

  • Flat screwdriver

  • Muffler assembly

  • Rubber muffler mounts

 How to Replace the Muffler on a Ford Explorer

Look under the back side of the Ford Explorer to check the muffler for cracks, holes or other breaks. If they are present, you will need to replace the muffler. If there are no holes, breaks or cracks, the muffler is probably not in need of replacement.

Purchase a new or used muffler for a Ford Explorer. Make sure the muffler corresponds to the same year as your vehicle. A new muffler is best, but one can sometimes find a good used muffler from a junk yard. The Ford Explorer has a muffler that has a 2.25-inch inlet and outlet diameter, a 4-inch X 9.75-inch X 13-inch case, and a 19-inch over all case length.

Place an old blanket or a large piece of cardboard on the ground beneath the rear part of the Ford Explorer. This will permit you to replace the muffler comfortably without lying on the actual ground.

Remove the old muffler from the vehicle. Loosen all the bolts that are on top of the muffler strap. Next, pull on the vertical section of the cross member to remove it from the strap and the SUV's exhaust mounting block. Take off the muffler. If the muffler is welded on, then you can break it away by knocking it with a sledge hammer. Dispose of the old muffler properly by breaking it down into small parts and put the small parts into a trash bag.

Install the new muffler on your Ford Explorer. Line the muffler straight with the clamps and then tighten the bolts with a wrench to hold it in place. The bolts should not be too tight. The muffler should be able to move slightly to prevent damage.

Start the engine and listen for any loud banging or growling sounds. If there are sounds, you may need to tighten the bolts more or it might not be over the exhaust pipe properly. Check the muffler visually to see if there are any leaks. If there are leaks, you didn't install it properly.

Items you will need

  • New or used muffler

  • Old blanket or a large piece of cardboard

  • Wrench

  • Sledge hammer

  • Trash bag

 How to Replace the Muffler on a Ford Focus

Determine if you need a new muffler on your Focus by looking under the car towards the back to see if there are any small or large holes in the muffler or to determine if it has fallen off partially or completely.

Purchase a muffler for a Ford Focus. Make sure you get the correct muffler that corresponds with the model year of your car. For example, the inlet can be anywhere from 2.25 to 2.5 to 3 inches in diameter depending on which muffler you require. The outlet diameter, however, should be 2.5 inches no matter which model year you own. The other measurements are usually 9.75 inches for the width and 19 inches for the overall length with only 13 inches in the case.

Place an old blanket or a large piece of cardboard on the ground beneath the rear part of the vehicle on the ground. For an easier repair, it's best, however, to jack the car up and place it on jack stands. You will have to lay under the car to replace the muffler, so be sure to use the way in which you will be most comfortable.

Look over the old muffler. Spray the fasteners generously with a penetrating lubricant before you loosen them. The penetrating lubricant will help you to remove the screws and bolts with ease.

Remove the old muffler. Use a crescent wrench to loosen any bolts around the muffler and take the muffler off. If the muffler is welded on, then you can break it away by knocking it with a sledge hammer or sawing it off with a hacksaw.

Replace the new muffler on your Ford Focus. Line it up as straight as possible with the clamps and then tighten the bolts to hold it in place. The bolts shouldn't be too tight because the muffler needs to move slightly to prevent damage. Make sure you hang the muffler with the muffler hangers that come with it. Don't put it on too loosely or it may fall off.

Start the engine and check the new muffler for any leaks or loud sounds. If there are leaks or loud sounds, then you may need to tighten the clamps more.

Items you will need

  • New or used muffler

  • Old blanket, a piece of large cardboard or jack stands

  • Penetrating spray lubricant

  • Crescent wrench

  • Hack saw

  • Sledge hammer

  • Trash bag