Engines • Transmissions • Installation
Built in East Texas. Shipped nationwide.
Engines • Transmissions • Installation
Pumps · Generators · Oilfield · Equipment
Engines built around the work they do. Big 3 builds diesel and natural-gas engines for pumps, generators, oilfield applications, tractors and equipment. Start with your engine tag and the machine it powers.
East Texas shop · Nationwide freight by quote · Visits by appointment
Choose your starting point
Request a generator engine build for diesel or natural-gas applications. Send the genset and engine tags, operating rating and diagnosis to Big 3.
Explore this applicationPlan an industrial pump engine build with Big 3. Identify the engine, pump, drive arrangement, fuel and operating duty before selecting an assembly.
Explore this applicationDiscuss an oilfield engine rebuild or replacement assembly with Big 3. Provide the engine tag, fuel, operating duty, driven equipment and delivery needs.
Explore this applicationRequest a tractor or equipment engine build from Big 3. Send engine and machine identifiers, diagnosis, accessory details and delivery requirements.
Explore this applicationDiscuss Cummins and Perkins builds, plus small- and big-block Chevrolet and Ford combinations. We also handle engine inquiries for Generac, Olympian and Cat equipment. The equipment name alone does not identify the installed engine; send both tags.
State the fuel the unit actually runs on. For natural-gas applications, include the fuel-system and ignition identification and any existing conversion details. We confirm the engine configuration and supplied components in the build quote.
A useful quote starts here
Engine manufacturer, model, serial number and readable identification-tag photos.
Equipment make, model, serial number, fuel type and rated operating information.
What failed, what will be reused, your location and the required completion date.
Confirm the machining, internal components, external equipment and test or commissioning responsibilities in writing. Engine work and complete-machine repair are different scopes.
Confirm whether exchange is required and whether a deposit is included or separate. A core must match the purchased engine and be rebuildable to receive credit. Freight and unloading arrangements are confirmed for the order.
Read core requirements →Agree on the build or supply schedule and the written coverage for your exact order. Inspection, parts availability and confirmed scope affect timing. Review the oil, maintenance and warranty requirements before use.
Review warranty information →No. The engine tag and equipment tag identify different parts of the application. Include both, along with fuel and operating details.
No. A guide describes an inquiry path. Current stock, build acceptance, price and lead time are confirmed for your specific order before payment.
Yes. Big 3 builds natural-gas engines for industrial applications. Send the engine and equipment identification, fuel-system details and operating requirements for a build-specific quote.
The engine build is the starting scope. Removal, installation, generator electrical work, pump work, field service and commissioning are included only if specifically agreed in your quote.
Put the next step in motion
Have your identifiers and diagnosis ready. We’ll work through the assembly, core, freight and the next step with you.
Brand and equipment names identify applications for inquiry. Big 3 is an independent engine builder; this page does not claim manufacturer affiliation or authorization.
Engines • Transmissions • Installation
Built in East Texas. Shipped nationwide.
Engines • Transmissions • Installation
Pumps · Generators · Oilfield · Equipment
Engines built around the work they do. Big 3 builds diesel and natural-gas engines for pumps, generators, oilfield applications, tractors and equipment. Start with your engine tag and the machine it powers.
East Texas shop · Nationwide freight by quote · Visits by appointment
Choose your starting point
Request a generator engine build for diesel or natural-gas applications. Send the genset and engine tags, operating rating and diagnosis to Big 3.
Explore this applicationPlan an industrial pump engine build with Big 3. Identify the engine, pump, drive arrangement, fuel and operating duty before selecting an assembly.
Explore this applicationDiscuss an oilfield engine rebuild or replacement assembly with Big 3. Provide the engine tag, fuel, operating duty, driven equipment and delivery needs.
Explore this applicationRequest a tractor or equipment engine build from Big 3. Send engine and machine identifiers, diagnosis, accessory details and delivery requirements.
Explore this applicationDiscuss Cummins and Perkins builds, plus small- and big-block Chevrolet and Ford combinations. We also handle engine inquiries for Generac, Olympian and Cat equipment. The equipment name alone does not identify the installed engine; send both tags.
State the fuel the unit actually runs on. For natural-gas applications, include the fuel-system and ignition identification and any existing conversion details. We confirm the engine configuration and supplied components in the build quote.
A useful quote starts here
Engine manufacturer, model, serial number and readable identification-tag photos.
Equipment make, model, serial number, fuel type and rated operating information.
What failed, what will be reused, your location and the required completion date.
Confirm the machining, internal components, external equipment and test or commissioning responsibilities in writing. Engine work and complete-machine repair are different scopes.
Confirm whether exchange is required and whether a deposit is included or separate. A core must match the purchased engine and be rebuildable to receive credit. Freight and unloading arrangements are confirmed for the order.
Read core requirements →Agree on the build or supply schedule and the written coverage for your exact order. Inspection, parts availability and confirmed scope affect timing. Review the oil, maintenance and warranty requirements before use.
Review warranty information →No. The engine tag and equipment tag identify different parts of the application. Include both, along with fuel and operating details.
No. A guide describes an inquiry path. Current stock, build acceptance, price and lead time are confirmed for your specific order before payment.
Yes. Big 3 builds natural-gas engines for industrial applications. Send the engine and equipment identification, fuel-system details and operating requirements for a build-specific quote.
The engine build is the starting scope. Removal, installation, generator electrical work, pump work, field service and commissioning are included only if specifically agreed in your quote.
Put the next step in motion
Have your identifiers and diagnosis ready. We’ll work through the assembly, core, freight and the next step with you.
Brand and equipment names identify applications for inquiry. Big 3 is an independent engine builder; this page does not claim manufacturer affiliation or authorization.