Problem: Article: If your muffler is not welded in place, it will be secured using muffler clamps.  Spray a rust penetrator like WD40 onto the fastening hardware to break through some of the rust and grime that may have seized the nuts in place.  You may need to spray the bolts and let them sit a few times before they are able to be loosened. You can purchase rust penetrator at most auto parts or large retail stores. Once the fasteners have been thoroughly soaked in rust penetrator, use a wrench to remove the nuts holding the exhaust clamp in place.  Make sure to use a socket or wrench of the correct size, as exhaust fasteners are prone to stripping or breaking.  If you intend to reuse the muffler clamp, you may want to spray it with more rust penetrator as you work it loose. You can purchase replacement muffler clamps at most auto parts stores if they are too rusty to be reused. Because the muffler and the piping have been held together with the exhaust clamp for so long, they may not come apart easily once the clamp is removed.  Spray some rust penetrator where the two pipes meet and try to work them away from one another until they slide completely apart.  If the pipes are rusted together, you may have to cut the pipes apart. If your muffler was welded in place, you will have to cut the pipes apart. The muffler will have metal prongs sticking out of the top that slide into rubber eyelets below the body of the car.  You may have to push the prongs through the rubber with a bit of force to get past the initial ridge.  The rubber will prevent the muffler from rattling inside the cabin of the vehicle once the muffler is completely installed. There should still be enough play in the rubber mounts to allow you to move the muffler around as you connect it to the exhaust pipe. Spray exhaust sealant on the pipe coming from the exhaust and the pipe it will connect to on the muffler.  This will help establish a seal between the pipes and prevent any exhaust from leaking at the joint.  Refer to the instructions on the exhaust sealant to know how long to let it cure. You can purchase exhaust sealant at your local auto parts store. Slide the pipe from the muffler over the existing exhaust pipe.  The muffler should rest directly below the rubber eyelets its mounted to, so the eyelet should hang straight up and down when the pipes are joined properly.  If the two pipes feel loose or can be wiggled, you will need an adaptor to match the correct size.  Most exhaust piping comes in two or two-and-a-half-inch diameters. You will not be able to seal the wrong size pipe onto another pipe, but adaptors for most diameters can be purchased at hardware or auto parts stores. With the piping seated properly, slide a muffler clamp over the area where the muffler pipe overlaps the other.  Use a hand or socket wrench to tighten the clamp until it is not possible to move the pipes back and forth at all.  You may want to use a half inch drive wrench to tighten the clamps to make sure you have enough leverage to tighten it sufficiently. Be sure you tighten the clamp where the piping overlaps, otherwise you may not create a solid seal.
Summary: Spray rust penetrator on the exhaust clamps. Loosen the exhaust clamps with a wrench. Slide the exhaust and muffler apart. Hang the new muffler on the mounts. Spray exhaust sealant on the ends of both pipes. Slide the exhaust pipes together. Secure the muffler clamps onto the pipe.

In one sentence, describe what the following article is about: If you’re collecting a sample from the tap, let the water run for at least 1 minute. Then, fill the glass so it’s at least ¾ of the way full. This is more than enough to spot anything out of the ordinary in a sample. For pools of water, scoop up a sample with the glass. You don’t need to sterilize the glass first. Think of the crystal clear water at a beautiful beach. Clean water looks transparent and doesn’t have anything floating in it. If you can’t see your hand on the other side of the glass, you’re probably not going to enjoy drinking that water. Anything floating in the glass could be a sign of bacteria or other problems.  Before getting on the phone with your water department, set the glass down and wait for a minute. Sometimes milky water clears up right away. That means the color came from air bubbles, so your water is safe to drink.  Hard water is water that has calcium, magnesium, and other minerals in it. The minerals cause the water to look a little cloudy. It is usually safe to drink but can be fixed with a water softener to avoid damage to your plumbing. Treat water with colored particles. For example, brown or orange particles are from rusty pipes while black ones come from rubber. Call a plumber to fix the problem. Even if your water doesn’t have anything floating in it, it may still not look completely clear. Discolored water not only looks gross but is a big red flag. These colors also turn up as stains on your dishes, clothing, bathtub, and other places. Use the strange coloring to figure out the source of the contamination before paying for a more comprehensive purity test.  For instance, brown water is a very common problem. The contamination comes from dirt and other sediments, which you might see settle at the bottom of the glass. Red and orange colors come from rusty pipes. Black could mean you have lead in the water, a very toxic metal that also often comes from pipes. Green usually means algae grew in your water supply, so don’t drink it. If it has a blue-green coloring, it could be copper instead. A black stain could also mean mold. If the water smells bad, play it safe by assuming that it is going to be unsafe to drink. Sometimes water has that distinct rotten egg smell of sulfur, which comes from bacteria in the water. Other times, it could have the smell of a swimming pool because of chlorine contamination.  If your water smells like nail polish or varnish, that could mean that some chemical leaked into the water supply. It might be from a home improvement project, for instance.  Purify water by filtering and boiling it to remove contaminants. If you’re using municipal water, call your city or utility company. Contact your local government for more information. If you don’t see anything unusual about the water, taste a little bit of it with the tip of your tongue. You can usually detect polluted water right away. Bitterness often means metal in the water, so order a more complete water test as you look for problems. If you detect salt instead and live near the sea, seawater could be leaking into your plumbing.  Clean water has a flat, bland taste. If your sample tastes metallic or like a fizzy soda, don’t risk drinking it. Keep in mind that you can’t always taste water quality issues. Things like bacteria and pesticides may not be easy to detect. Normally you can tell by looking at the water, but double-check with a lab test if necessary.
Summary:
Fill a clean, clear glass full of water. Hold the glass up to the light to see if it looks cloudy. Look for color changes in the water. Smell the water to see if it smells harsh or rotten. Taste the water for bitterness if it looks safe to drink.