3D modeling of vehicle parts such as the engine requires knowledge of the major components, functions, and engine classification. Internal combustion engines have many components and these can vary according to the engine classification.

Therefore, to effectively start modeling engines it is a good idea to start off by studying the components and the engine classification.

Start off by looking at the engine configuration and its use. Also, pay special attention to the layout of the major components, which include the cylinders, pistons, crankshafts and camshafts. Then, use this to determine the main configuration of the engine. Examples of engine configurations include the four stroke engine, two stroke engine, Wankel or pistonless rotary engine, gas turbines, and jet engines.

After you have determined your engine configuration, it is helpful to locate the major components too. For this you can use engine diagrams, mechanical drawings, photographs, digital images or still renders of existing 3d models.

A great way to cut down your 3d modeling and rendering time and costs is to get a stock 3d model of an engine that has the same classification (configuration and similar components) as the engine you are looking to model or use.

When modeling engines, it is important to note that for internal combustion engines, the shape of the combined engine block and the crankcase greatly influences the location of the components. Therefore, the location of the major components of the engine and their shape can help you search for and identify the type of engine you are looking for.