Tech Tips On Exhaust Pipes. See Details Below!
Exhaust pipes do three jobs. They carry hot and toxic gases from the engine (usually at the front) and release them out the back so they do not discomfort or poison passengers or foul the bodywork;they“muffle”the tremendous noise that a working engine generates; and they create “back pressure”,which is necessary to correct and efficient combustion.
If an exhaust leaks,all these functions fail to some de-gree. Obviously the size of the leak is crucial but so,too,is its position.The nearer the engine a leak occurs,the more serious the failure.
Leaks near the engine manifold should be attended to as a high priority,as apart from the danger of toxins and noise that assaults everybody in the vicinity,the loss of back pressure can cause overheating and rapid and severe engine damage (burnt exhaust valves).
Exhaust pipes wear out mainly because of corrosion,which causes leaks.But dents in the pipe are also seri-ous,as they restrict the flow of gases too much,reduc-ing performance and increasing fuel consumption.
If your car suddenly becomes sluggish,and all else seems to be in good working order,then a restriction in the ex-haust pipe is a possible cause.
If an exhaust is in generally good condition,repairs of leaking or dented sections are a feasible alternative to replacing the whole system.But welding is not the best fix-it will promote more rapid corrosion of the sur-rounding pipe.
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The best repair is to cut out the damaged section and replace it with a new length of pipe-again not weld-ed into place,but joined as a tightly fitting sleeve with an overlap of 5-10cm at each end.All competent work-shops should be able to achieve this sleeve process,known as“swaging”
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Tech Tips On Exhaust Pipes. See Details Below!
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