What Causes the Exhaust Pipe to Turn Red?
1 Answers
Exhaust pipes turning red occur when part of the combustible gas from the cylinders enters the exhaust pipe and continues to burn. The specific reasons are as follows: Combustible gases rushing into the exhaust pipe: This leads to the exhaust gases entering the exhaust pipe, raising the exhaust temperature. If the fuel injection timing is too late, it not only slows down the combustion rate but also results in incomplete combustion, causing diesel to burn in the exhaust pipe during the later stages of injection, thereby increasing the exhaust temperature. Part of the combustible gas from the cylinders enters the exhaust pipe: An overly lean air-fuel mixture can cause slow combustion after ignition, extending into the exhaust stroke and continuing to burn. Exhaust valve leakage or insufficient valve clearance: If the exhaust valve does not seal properly or the valve clearance is too small, it allows combustion gases to enter the exhaust pipe, raising the exhaust pipe temperature.