High EGTs are caused by excessive fuel or a lack of air even in stock applications, it is necessary to monitor it with a pyrometer. Anything over 1,500 degrees is doing immediate damage to the engine, such as melting parts of the turbo and internal engine damage melting, cracking, or even blowing holes in the pistons or any of the other various components, which leads to total engine failure. When pulling a heavy trailer up a steep incline, sled pulling or racing EGTs can exceed 1,800 degrees. Extended periods at temperatures over 1,300 degrees are diminishing the life of your engine. Under heavy load or extreme acceleration, exhaust gasses increase rapidly and can reach temperatures over one thousand degrees in seconds while 1,200-1,300 degrees is nothing to worry about for short periods of time. It is in your best interest to invest in a pyrometer (EGT gauge). Unfortunately, most vehicles do not come equipped with a way to do this. With exhaust gasses capable of reaching temperatures well over the heat capacity of various parts, it is one of the most important things to keep in check. With the high amount of heat that an engine produces, exhaust temperatures can reach nearly 2,000 degrees under a heavy load.Īluminum (which is used in multiple essential components of a diesel engine, such as pistons, exhaust manifolds, and even the engine heads), has a melting point just over 1,220 degrees. Exhaust gas temperatures (EGTs) are critical to monitor in your diesel.
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