Remanufactured Heavy-Duty Diesel Engines

Ironstar remanufactures Cummins, Detroit, and Caterpillar diesel engines to exacting spec — measured, machined, and rebuilt by master builders, then documented in a full photo record and warrantied. Sold complete and drop-in ready, with no core to send back, and shipped nationwide to the construction, aggregate, and vocational crews who can't afford downtime.

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Engine Platforms We Remanufacture

Primary

Cummins ISX / X15

The workhorse of heavy-duty trucking — and its modern X15 evolution. Our widest-use platform, remanufactured to spec for vocational and long-haul duty.

Secondary

Detroit Series 60

A proven, durable platform. Rebuilt and tested to keep older fleets running strong.

Available

Caterpillar C15

Heavy-duty CAT power, remanufactured for trucks and vocational equipment.

How Every Engine Is Remanufactured

Stage	What we do
Inspection & identity	Core is serial-verified and inspected for cracks and prior damage before any work begins.
Measurement	Crank journals, bores, decks, and heads are measured against spec — objective QC, not opinion.
Machining	Components are machined as required; nothing goes back in unchecked.
Quality components	Bearings, piston & liner kits, gaskets, and pumps from OEM and premium suppliers — Clevite, Mahle, IPD, and OEM where it counts.
Assembly & QC	Built to torque spec, final-inspected, signed off, and documented with a photo packet.

Need a Reman Engine Quote?

Tell us your platform and we'll send pricing and lead time. Cummins ISX, X15, Detroit Series 60, and Caterpillar C15.

Request a Quote