where is the engine crankcase and how to put engine treatment in
Report Abuse. crank case is just another name for an engine. The case that holds the crank. The crank is a major part of your engine that when the ignition turns it turns the crank which allows your engine to run.So in other words put it in where the oil goes.If they said to pour it in your engine it would be no different.eport Abuse. crank case is just another name for an engine. The case that holds the crank. The crank is a major part of your engine that when the ignition turns it turns the crank which allows your engine to run.