If you’ve shopped for a replacement engine, you’ve probably seen the term “long block.” Knowing exactly what it includes — and what it doesn’t — helps you avoid buying the wrong thing or paying for parts you already have.
What Is a Long Block Engine?
A long block is an assembled engine consisting of the engine block, crankshaft, pistons, cylinder head(s) and valvetrain — the major internal components — but typically without external accessories like the intake and exhaust manifolds, fuel system, alternator, starter and other bolt-on parts. You reuse those from your old engine or source them separately.
Long Block vs Short Block vs Complete Engine
Short Block
The block, crankshaft and pistons — no cylinder head. You add the head and everything above it.
Long Block
Short block plus cylinder head and valvetrain. Ready for external accessories to be added.
Complete Engine
A long block with most or all accessories already fitted — closest to a drop-in unit.
When Should You Buy a Long Block?
- Your existing accessories are in good condition and can be reused.
- You want to save money versus a complete engine.
- Your mechanic is comfortable transferring the external parts.
Buy a complete engine instead if you want the simplest installation or your accessories are worn.
Frequently Asked Questions
Does a long block include the turbo?
Usually not. Turbos, manifolds and fuel systems are typically separate — confirm what’s included before buying.
Is a long block cheaper than a complete engine?
Generally yes, because it has fewer parts. Factor in the cost or labour of transferring your accessories.
Will a long block fit my car?
Match the engine code and VIN to be sure. Ask which components are included.
Conclusion
A long block is a cost-effective choice when your external accessories are reusable and your installer is comfortable with the swap. Always confirm the exact parts included so there are no surprises on install day.
Need help deciding between a long block and a complete engine? Get a quote and we’ll clarify exactly what’s included. Browse Engine Components & Parts too.