The current study aims to explore the combustion process in a diesel engine and investigate the behavior of pollutant formation at different time events and different locations in the combustion chamber. The time event for maximum rate of production of pollutant soot is also investigated. Further, time events are investigate at which almost all the amounts of pollutants soot and nitric oxide have been produced. The combustion simulation is performed on a 3D sector. Finite volume method is used for numerically solving the partial differential equations that govern the flow along with Transition SST turbulence model. Eddy dissipation model is used for turbulence chemistry interaction. For soot calculation, Moss-Brookes model is used which has less empiricism and theoretically provides superior accuracy.