How much does an EJ25 block weigh?
The weight depends on what you count as the “block”: a bare short block, a long block with heads, or a fully dressed engine. Subaru does not publish a single official weight for the EJ25 block, so enthusiasts and vendors provide ranges based on model year and configuration. Here is a clear breakdown to guide you.
What counts as the block in this context
In engine terminology, several terms are used interchangeably in everyday language. A bare block (short block) typically means the engine block together with the crankshaft and bottom-end components, but without cylinder heads or external accessories. A long block adds cylinder heads and valvetrain. A fully dressed engine includes intake and exhaust manifolds, fuel system, cooling, and all ancillaries. This article uses those definitions to present weights in commonly cited configurations.
Block material and its effect
Block material (often iron versus aluminum) and the inclusion of internal components can significantly influence the weight. Most EJ25 blocks use a combination of materials that affect the total mass, with aluminum variants being lighter than traditional cast iron blocks.
Weight estimates by configuration
Below are ranges reported by enthusiasts, salvage listings, and service data. These figures are approximate and can vary by model year and specific build.
- Bare short block (block, crank, pistons, connecting rods; no heads or external accessories): 60–90 kg (130–200 lb)
- Long block with cylinder heads and valvetrain, but no external systems: 120–180 kg (265–395 lb)
- Fully dressed engine (long block plus intake, exhaust, water pump, alternator, starter, etc.): 180–240 kg (395–530 lb)
These ranges provide a practical guide for shipping, swapping, or planning repairs. For a precise figure, consult the specific variant’s data from a parts supplier, a service manual, or weigh the unit on a scale.
Material and model-year considerations
Block material and production revisions across generations can shift weight by several kilograms. An aluminum-block EJ25 variant will typically be lighter than a cast iron-block version by a noticeable margin, while revised blocks or strengthened components in later model years may add weight. Always verify the exact weight for the specific part you are using or sourcing, especially when coordinating shipments or weight-sensitive installations.
Summary
In short, the EJ25 block weight varies by configuration and material. A bare short block typically weighs about 60–90 kg (130–200 lb). A long block with heads weighs roughly 120–180 kg (265–395 lb). A fully dressed engine can reach about 180–240 kg (395–530 lb). Actual weights depend on model year and whether the block is iron or aluminum, so check precise specifications from the source when exact numbers are needed.
How much does an EJ25 engine weigh?
The weight of a Subaru EJ25 engine varies depending on whether it's a long block or a complete, "wet" engine, and whether it has a turbocharger. A bare long block can weigh around 165.5165.5165.5 lbs, while a complete, wet, turbocharged engine can weigh about 265265265 lbs. A complete Subaru EJ25 engine in a JDM WRX can weigh up to 450450450 lbs with its accessories, but a more typical weight for a complete engine is around 400400400 lbs.
- Bare long block: Approximately 165.5165.5165.5 lbs
- Dry, complete engine (with manifold and turbo): Around 240240240 lbs
- Wet, complete engine (with fluids, manifold, and turbo): Approximately 265265265 lbs
- Complete engine (fully dressed, e.g., JDM EJ255): Up to 450450450 lbs
- General estimate for a complete engine: Around 400400400 lbs
How much does a Subaru engine block weigh?
As per the Subaru parts attributes in the parts catalog: 11010AB380 - Block Halves (no crank/pistons/etc.) - ~ 60 lbs. 10103AC480 - Short block - ~110 lbs.
How heavy is ej255?
A friend and I pulled my ej255 without a lift and it was every bit of 300lbs with the intake and some accessories.
How much does a Subaru 2.5 L engine weigh?
A complete Subaru 2.5L engine can weigh anywhere from approximately 260 lbs to over 400 lbs, depending on the specific model and included accessories. A "bare" or "long block" engine is lighter, around 260 lbs, while a complete engine with manifolds, accessories, and the flywheel will be much heavier.
- Bare/Long block: Around 262 lbs (without oil, coolant, or most accessories like the alternator or A/C pump, but with manifolds, flywheel, and clutch).
- Complete (approximate): Around 400 lbs, depending on the model and what accessories are included. Some sources report complete engine weights closer to 350 lbs for non-turbo models.
- Turbocharged models: Can weigh slightly more due to the turbocharger and intercooler.
- Short blocks: A short block can weigh as little as 115 lbs to 119 lbs.
- Factory crate engines: Some suppliers provide a shipping weight that can be higher, for example, 450 lbs for a JDM EJ255 turbo engine.
