Standard EMD & GE locomotive cores, radiators, oil coolers & charge air coolers in stock for immediate shipment. Made in Wisconsin. Fitment support from our engineers.
When a locomotive is out of service, the cooling component you need is the one you can get. General ThermoDynamics & Airtech stocks standard EMD and GE locomotive cores, radiators, oil coolers, and charge air coolers for immediate shipment — built with mechanically bonded copper-brass construction that resists the vibration-induced leak paths behind most aftermarket warranty returns.
A distributor's fill rate and a rebuilder's bay schedule both depend on whether the cooling core ships this week or next quarter. Domestic manufacturing in Wisconsin means quotable, predictable lead times — not a container schedule nobody controls. Reliable lead times also lower the safety stock a distributor must carry to hit a target service level.
A complete air-cooled portfolio from one qualified source — broader catalog coverage for distributors, fewer vendors to manage on a rebuild program.
Everyone in the aftermarket channel carries the same asymmetry: you warrant a cooling component you didn't manufacture. The margin on the sale is fixed; the warranty exposure isn't.
The failure mode behind most locomotive cooling-circuit claims is consistent — brazed and soldered joints fatigue under the thermal cycling and vibration the engine generates every operating hour, failing late enough after delivery to become the seller's problem.
Mechanically bonded copper-brass has no brazed joints to crack.
Most distributors and repair shops don't staff a thermal engineer — and shouldn't have to. Our application engineers handle OEM-to-aftermarket cross-referencing, correct-fit confirmation before the part ships (reducing misfit returns), and thermal sizing when a repower or Tier upgrade changes what the cooling package has to do. Direct engineer access, not a ticket queue.
General ThermoDynamics & Airtech has engineered thermal solutions for the domestic and international rail industries for more than 25 years. Domestic manufacturing in Wisconsin delivers the lead-time predictability and supply continuity the aftermarket channel depends on — with application engineers you reach directly.
Yes. General ThermoDynamics & Airtech stocks standard EMD and GE locomotive cores and intercooler replacements for immediate shipment. Domestic manufacturing in Wisconsin means lead times are predictable and quotable, so distributors can protect fill rate and rebuilders can hold a scheduled bay slot.
Yes. When an original core is discontinued and OEM support has lapsed, our application engineers provide build-to-print fabrication and adapted-fit engineering. Send the model, core number, or drawing and we will confirm what can be supplied or engineered to fit.
Brazed and soldered joints fatigue under the thermal cycling and vibration of locomotive service, causing most cooling-circuit leaks after delivery. Mechanically bonded copper-brass has no brazed joints to crack, so the component you sold and warranted is far more likely to stay in service.
Yes. Our mechanically bonded copper-brass radiators use individually replaceable tube rows, so repairs can be made at the locomotive rather than requiring a depot return or full core replacement. That keeps recore and repair work profitable within the channel.
Yes. When a repower or emissions upgrade changes the engine's heat rejection, the existing radiator or charge air cooler may no longer be adequate. Our application engineers provide thermal sizing so the cooling package matches the uprated engine rather than being adapted by guess.
Yes. We supply MRO distributors and parts suppliers, independent rebuilders and remanufacturers, locomotive repair shops, and railroad and transit fleets across North America, with stocking support, fitment cross-referencing, and direct application engineering access.
Send the model, core number, or drawing. An application engineer confirms fitment and lead time before the part ships.