The first step to building a high-quality engine mould is to determine the cores you need. There are several different types of cores: integral barrel-crankcase cores, water jacket slab core assemblies, and cylinder bore liners. If you're working with more than one type of core, it can be important to consider parting lines between the components. If parting lines are too close together, they may result in a weaker product. It's also important to consider the dimensional accuracy of the components. This will help determine the location of bore liners.

The engine mould package will include several cores, including the base core, the side cores, and the internal cores. If you're working with a V block engine mould, the package will contain a guide sleeve, a base mold plate assembly, and a couple of mold plate assemblies. The sleeve is arranged between the two mold plate assemblies and helps to control vibrations.

If you're working with a cylindrical die engine mould, you'll need to ensure the casting pressing port is far away from the die. This is important because the press port can be used to continuously add molten iron to the casting part for effective feeding shrinkage. This will ensure the casting is a good match for the engine.

Lastly, you'll need to consider the parting lines on the outside of the engine mould package. If they're too close together, there's a good chance they will overlap, and if they do, the molten metal could be lost. It's important to ensure that the parting lines are clean and symmetrical.