What Causes Excessive Exhaust Emissions?

[CharlotteMarie]

Excessive exhaust emissions in vehicles are mostly caused by engine-related issues. Below are the reasons for excessive engine emissions and corresponding solutions: 1. Cause One: The primary reason is severe wear between piston rings or cylinder liners. Solution One: To prevent excessive emissions, it is recommended to replace the piston rings and cylinder liners. 2. Cause Two: Incomplete engine combustion or mechanical engine failures, such as severe wear of cylinder liners and pistons, excessive clearance between cylinders and pistons, etc. Excessive clearance between cylinders and pistons allows too much engine oil to enter the cylinders, or overfilling the oil pan. During splash lubrication, a large amount of oil enters the cylinders. High-temperature gases from the cylinders enter the oil pan, contaminating and thinning the oil, which affects lubrication and leads to excessive emissions. Lack of regular maintenance of the fuel system, intake system, and fuel injectors results in carbon deposits and sludge buildup. Solution Two: The remedy is to have the vehicle inspected and repaired at a maintenance shop.