What are the causes of excessive engine exhaust?
2 Answers
The causes of excessive engine exhaust are: 1. Wear of cylinder liners and pistons, resulting in decreased engine output power, leading to excessive engine exhaust; 2. Wear between engine piston rings and cylinder liners; 3. Use of engine oil with a low viscosity grade, or degradation of oil due to prolonged non-replacement causing viscosity reduction; 4. Poor engine cooling, with oil affected by high temperatures, degrading in a short time and causing low viscosity; 5. Wear of piston rings. Solution: Car owners should promptly visit a repair shop or 4S store for professional inspection and maintenance to prevent trouble during the annual vehicle inspection due to exhaust issues.
I've found there are quite a few reasons for excessive engine exhaust, mainly issues with the combustion system. Incomplete combustion is the most common, such as uneven air-fuel mixture or worn spark plugs failing to ignite properly, leading to unburned fuel and black smoke. Another frequent scenario is engine oil leaking into the combustion chamber, like when piston rings or valve stem seals are damaged, resulting in blue smoke with a distinct oil smell. EGR valve malfunctions can also disrupt exhaust gas recirculation, increasing emissions. Don't overlook fuel system problems either – clogged injectors or excessive carbon buildup can raise fuel consumption. I always recommend observing smoke color – black indicates fuel issues, blue points to oil problems, while white may suggest coolant leakage. Don't delay repairs as prolonged issues can damage the catalytic converter and increase repair costs. Regular checks of air-fuel ratio and spark plug condition can prevent these, keeping your engine running clean.
