What is the impact of excessive EGT on engine performance?

Excessive Exhaust Gas Temperature (EGT) can significantly affect engine performance and longevity. High EGT levels indicate that the engine is operating at higher thermal loads than normal, which can lead to several detrimental outcomes.

Increased EGT can result in premature wear of engine components, particularly in the turbocharger, exhaust valves, and piston rings. Over time, the excessive heat can cause materials to warp or become brittle, leading to potential mechanical failure. For example, turbochargers may suffer from heat stress, causing failure of the turbine and compressor, which are crucial for maintaining engine performance.

Moreover, consistently high EGT can lead to knocking or pre-ignition, where the fuel-air mixture detonates prematurely, resulting in reduced power output and efficiency. This can ultimately impact the overall health of the engine, possibly requiring costly repairs or even complete engine replacement.

Therefore, monitoring and managing EGT is vital for maintaining optimal engine performance and ensuring that the engine operates within safe temperature limits to avoid damage.