SERVING SAN ANTONIO & SOUTH TEXAS FOR 50+ YEARS

Why Choose Duffin Diesel?

Unexpected downtime can bring operations to a halt. That’s why industrial customers throughout South Texas rely on Duffin Diesel for precision engine machining, dependable quality, and responsive turnaround.
For over 50 years, our experienced machinists have combined proven craftsmanship with advanced equipment to machine and restore critical engine components that keep generators, pumps, compressors, municipal equipment, and industrial power systems operating reliably.

Precision. Experience. Reliability. Since 1970

Common Engines We Service

Caterpillar

C4.4 | C7 | C9 | C15

Cummins

B3.3 | QSB | QSL | QSX

Perkins

400 Series | 1100 Series | 1200 Series

Kubota

V2403 | V3307 | V3800

Mitsubishi

S4S | S6S

Yanmar

3TNV | 4TNV


Precision Machining Services

✔ Cylinder Head Rebuilding

✔ Engine Block Machining

✔ Counterbore Repair

✔ Main Bore Alignment

✔ Crankshaft Grinding & Polishing

✔ Connecting Rod Reconditioning

✔ Precision Measurement & Inspection


Industrial Applications

• Forklifts

• Generator Sets

• Air Compressors

• Water Pumps

• Industrial Power Units

• Warehouse Equipment

• Municipal Equipment

• Construction Support Equipment


Don’t See Your Engine Listed?

Our team regularly machines and restores a wide variety of diesel engine components used in industrial and commercial equipment. If your engine isn’t listed above, contact us to discuss your application. Chances are, we’ve worked on it before.


Ready to Get Your Equipment Back to Work?

Whether you’re repairing a forklift, generator, pump, compressor, or other industrial equipment, Duffin Diesel has the experience, precision equipment, and craftsmanship to restore your engine components with confidence.

📞 Call Duffin Diesel today at (210) 341-8183 to discuss your project or request a quote.
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