To yourself to put the muffler, use trestle or pit. We'll drive her car and be sure to put stops under the wheels. Inspect the exhaust system. If the muffler had not changed, first treat all connections corrosion liquid. You can use regular kerosene or vinegar.
In that case, if the parts of the muffler are connected by inner flanges with the connecting ring, the greatest difficulties arise when replacing only due to the presence of rust. Unscrew the bolts, remove the flange and simply screw on a silencer. If the connection parts silencer made "pipe in pipe", as follows.
"Knock" first connection using two hammers. Keep one of them as the base for the pipe upon impact. Have an assistant during obstaravania wiggle from side to side the back of the muffler. The internal rust will crumble a bit, the connection will weaken, and it can be separate.
If obstaravanie did not help, do the following. Take a flat head screwdriver and insert it into the slit on the outside of the pipe. Atribuite strike metal pipe in section. This technique will weaken the joint and will help to stir up the exhaust pipe.
If you need to replace only the exhaust pipe (the so-called "pants") or to change the gasket silencer on the discharge flange to first prepare the connection. Lubricate the nut compound against rust. Carefully, without any special effort, knock the nuts of a flange of a reception pipe of the muffler through the end head.
Loosen the connection carefully, without applying unnecessary force to avoid damage to them. Otherwise you'll have to disassemble the engine to drill chip carving. Use to loosen the key "head" and "knob". If you use carob keys, this will lead, subsequently, to the impossibility of seizure of the screws, even with mechanical heads. Do loosening-and-fro motion in order to cleaned threads of the thread.
Put a new muffler. Details need to be set straight. Use new mounting bolts and nuts, new gaskets and clamps. When installing be sure to lubricate the threads with graphite grease, so that later they are not attached to each other. Do not tighten the clamps so the muffler pipe is not deformed. Then make out such a connection would be very difficult.
Use special Assembly sealant for the exhaust system, ensure that it does not enter inside the pipe. All of these little tricks will extend the service life of the new muffler, and to facilitate dismantling in the future.