Short block engine and long block engine
Despite their names, both engine types are similar in size. They differ only in the components they carry. A short block engine package typically includes the engine block, crank and pistons. The term short block comes from the short list of components in the engine, which usually come with a short warranty. The long block engine includes all parts of the short block package with the addition of cylinder head, camshaft and valve train. Most aftermarket and replacement engines can be ordered as short blocks or long blocks. But there are many other factors that influence which type of engine to put in a particular vehicle and a particular budget. A turnkey or crate engine is a fully assembled engine that is typically shipped from the manufacturer to the installer in a crate. All the installer has to do is attach it to the vehicle, turn the key, and start the car. Turnkey engine packages typically include throttle pedals, spark plugs, airflow sensors, and various other small parts in ...