Aside from the signature noise of V8 and V12 engines, also in some cases of engines that have big fans fitted to it, loud engine noise may be considered abnormal in some cases. When an unfamiliar noise starts coming from smaller engines like a 4 cylinder inline or a V6 engine, it may get you worried. We will discuss some of the source areas mechanics find to be the most common places for engine noises to originate from.

Please follow the link below to read more:
https://www.spotdem.com/2019/12/22/loud-engine-noise-is-this-normal/

A simple Nairaland search will solve your engine noise problem