Commercial Truck Engines — Used, Rebuilt & Remanufactured Diesel

AutoPartsOcean specializes in the diesel platforms that move freight and run heavy equipment across North America. Each brand below has its own dedicated page with model-specific detail, specs and fitment notes.

Used (takeout) engines are complete, running units pulled from low-mileage trucks. They offer the lowest price and fastest availability, and we dyno-test or compression-check units where possible. Rebuilt engines are torn down and have wear components replaced as needed. Remanufactured engines are restored to OEM specification with new bearings, seals, gaskets and reground or replaced internals — the closest thing to new short of buying from the dealer.

For a high-mileage truck you plan to trade soon, a quality used engine is usually the smart play. For a truck you intend to keep working for years, a remanufactured long block or complete engine delivers the longest service life and the strongest warranty. We will quote all available options so you can weigh price against expected hours of service.

A long block includes the block, crankshaft, pistons, cylinder heads and valvetrain, but typically excludes accessories like the turbo, fuel system, manifolds and EGR components — which you transfer from your old engine. A complete (drop-in) engine arrives with most of those accessories installed, reducing labor time. We will confirm exactly what is included before you commit.

Most remanufactured and many used diesel engines are sold on a core exchange basis: you return your old engine (the core) for credit. Cores must generally be complete and rebuildable. We explain core charges, deadlines and freight up front so there are no surprises on your invoice.

Every engine we supply carries a warranty — typically a 6-month standard term with extended coverage available on remanufactured units. We arrange freight nationwide via commercial carriers, palletized and crated for heavy diesel blocks, with terminal pickup or lift-gate delivery to your location. For fleets fighting downtime, we prioritize in-stock units and expedited shipping so a truck spends less time parked and more time earning.