Rust is the scourge of any car and a nightmare of every driver. If you do not take measures to protect the body of the most vulnerable parts and parts, then very soon corrosion may develop on the structural elements of the machine. After a relatively short period of time, it will capture large areas without any problems and begin to disable important elements. A car muffler is one of those parts that are constantly at high risk.
First of all, one simple truth should be emphasized: a car muffler is not at all the thing to save on. Better to refrain from purchasing equipment made from conventional iron. Such mufflers quickly burn out and rot. It is better to immediately purchase products made of high-quality heat-resistant alloy steel. However, even this may not be enough to protect the assembly from corrosion.
In order to prevent rust from seizing a car or even an individual part, it is necessary to be proactive. First of all, a drain hole should be made in the muffler. It is drilled with a thin drill at the bottom of the rear "can" of the node. This hole is necessary so that the condensate formed due to constant temperature drops does not accumulate in the muffler, but goes out. It is the accumulation of more moisture in the muffler that leads to the rapid growth of rust.
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But not everything is so simple! Before you grab the drill and drill holes in the assembly, you need to know the make and model of your muffler. When it is found out, we "break through" its scheme on the Internet and look at the location of the blind partitions inside the bank (it may be that they will not be at all). If there are partitions in the bank, then you will have to drill in several places - one hole for each compartment.
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In addition, it is recommended to coat the muffler with an anti-corrosion compound. You can prepare it yourself from 1 liter of solvent and 1 kg of graphite grease. The composition is thoroughly mixed, after which the entire muffler is covered with it. You can also pour a little of the composition into the muffler itself, but in this case, you will have to leave the car in rest for two days, so that the solvent evaporates from the muffler and only a film of graphite lubricants.
If you want to know even more interesting things, then you should read about what to do if the screw is "stuck": how to do without a car service and chemicals.
A source: https://novate.ru/blogs/300320/53966/