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Engine Assembly
The engine assembly is the complete long block or short block engine unit, including the cylinder block, cylinder heads, pistons, crankshaft, camshafts, and valvetrain.
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Buying Guide
Engine Assembly Buying Guide
An engine replacement is a major investment. Understanding what you're buying — and what you'll still need — saves expensive surprises.
The engine long block: cylinder block, cylinder heads, pistons, crankshaft, camshaft(s), and valvetrain fully assembled. Some sellers ship a complete engine with intake, exhaust, and accessories attached. Always confirm exactly what is and isn't included before purchasing.
Typically NOT included: intake manifold, exhaust manifolds, alternator, power steering pump, AC compressor, engine mounts, sensors (MAP, O2, coolant temp, etc.), wiring harness, belts, water pump, thermostat, oil pan (sometimes), valve cover (sometimes), turbocharger (if applicable).
Plan to transfer all these components from your original engine, or budget to replace consumables (belt, water pump, thermostat, oil pan gasket) at installation.
Used (pulls) — pulled from a low-mileage donor; least expensive but unknown internal wear. Suitable when donor mileage is well-documented and low
Remanufactured — professionally rebuilt to OEM tolerances with worn components replaced; best warranty and reliability
Rebuilt — shop-rebuilt to varying standards; quality highly depends on the rebuilder
For used engines, insist on the donor vehicle's VIN and mileage. Run a history report. An engine from a totaled, low-mileage vehicle is a great value; one from an unknown high-mileage donor is a gamble.
If possible, have a compression test run on the used engine before purchase, or request confirmation it was running at removal. A compression test reveals head gasket condition and piston/ring wear.
Engines are identified by:
Engine code — typically stamped on the block or found on a tag; must match your vehicle's required engine family
Casting numbers — on the block and head, confirming exact specifications
Displacement and configuration — even within the same model year, different displacement options (e.g., 3.5L vs. 5.0L) are obviously not interchangeable
At minimum, plan to replace: oil and filter, coolant, serpentine belt, water pump, thermostat, and all gaskets. On high-mileage donor engines, consider timing belt/chain service if accessible.
In states with strict emissions rules (California CARB, and states following CARB standards), imported or non-CARB-compliant engines may not pass emissions tests. Confirm compliance if you're in an affected state.
Engines ship via freight on a pallet, typically with curbside delivery. Liftgate service is available at checkout if you don't have a forklift or loading dock.
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Frequently asked questions
Quick answers on fitment, shipping, returns, payments, and how ShopEarl works.
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ShopEarl.com is a network of American auto part suppliers - salvage yards, aftermarket vendors, and powertrain remanufacturers.
Our mission is to make finding the right auto part easy, affordable, and environmentally friendly by giving quality used parts a second life and keeping them out of landfills.
We use a comprehensive vehicle fitment database that matches parts to specific makes, models, years, and engine types.
For critical components like engines and transmissions, we also require VIN verification for your vehicle to ensure an exact match. The VIN (Vehicle Identification Number) contains specific information about your vehicle's configuration that helps identify the exact parts it needs.
If you're ever unsure about fitment, our team is available to help verify compatibility before you make a purchase.
ShopEarl.com accepts the following payment methods:
- Major credit and debit cards, including Visa, MasterCard, and American Express
- Affirm
- Link
- Apple Pay
- Google Pay
All payment data is encrypted using TLS technology. We never see or store your full payment information—only a secure token provided by our processor to complete your purchase.
ShopEarl.com offers free shipping within the continental United States. Shipping times can vary depending on shipping methods, and ‘unbolted’ used parts typically ship a day faster than ‘yard’ parts that have to be professionally dismantled from the vehicle first. You’ll receive email and text notifications every step of the way.
Delivery to commercial locations is always free, but larger parts that ship freight may incur surcharges if they are delivered to a residential address. You can always ship these for free to a repair facility or our team can help find a nearby commercial address for local pickup.
At the moment, we don’t offer expedited shipping options. However, we’re always looking for ways to improve our services, and we hope to offer faster shipping options in the future.
All parts come with a minimum 30 day return window from the date your part arrives. See full return policy for all the details.
A core charge is a refundable fee charged when you buy a part that can be rebuilt or remanufactured, like an engine, alternator, or transmission. It works like a deposit:
- You pay the core charge upfront when you buy the part.
- After installing the new part, you return the old part (the “core”) to the seller.
This system encourages recycling and helps manufacturers refurbish used parts instead of making new ones from scratch.
Used parts are OEM auto parts professionally dismantled by certified auto recyclers.
Remanufactured parts are used OEM parts that have been completely disassembled, cleaned, and rebuilt with new components where necessary. They're tested to meet or exceed original equipment specifications, and often come with warranties similar to new parts.
New parts are new, aftermarket components that have never been installed on a vehicle.