The exhaust system is designed for approximately 60 thousand km. Naturally, the service life of the system depends on the mode of operation of the vehicle. If the vehicle is mainly used for short hauls, much more condensate, soot and corrosive acids are deposited inside the system than during long distance hauls with a fully warmed up engine.
An exhaust pipe with an installed catalytic converter rusts less often than other parts, since in this place the temperature of the gases still lies in the range from 800 to 1000°C.
In the exhaust pipe and the additional silencer, the exhaust gases are gradually cooled, in the exhaust pipe of the silencer their temperature is only 150-300°C. Therefore, most of the condensate is released in the last (additional) muffler. The condensate mixes with the residual combustion products, and corrosive acids are formed, as a result, the exhaust pipe can rust.
The front parts of the exhaust system can be subjected to thermal stress when driving over long distances if hot metal is constantly cooled during rain. The metal may crack or tear.
water splash (especially salty) contribute to external corrosion. Rock impacts and landing on hard ground will also shorten the life of the system, as will the vibration that occurs if the rubber suspension is defective or missing.
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