SERVING SAN ANTONIO & SOUTH TEXAS FOR 50+ YEARS

Why Choose Duffin Diesel?

Farming doesn’t stop when an engine fails. That’s why farmers, ranchers, equipment dealers, and agricultural contractors throughout South Texas rely on Duffin Diesel for precision engine machining and dependable turnaround. For more than 50 years, our experienced machinists have restored critical diesel engine components that keep tractors, combines, irrigation systems, and agricultural equipment working when they’re needed most.

Precision. Experience. Reliability. Since 1970

Common Engines We Service

John Deere

4045 | 6068 | 6466 | PowerTech Series

Cummins

QSB | QSL | 5.9L | 6.7L | ISC | ISL

Agricultural Applications

Irrigation Power Units | Tractor Engines | Combine Engines | Sprayer Engines | Feed Mill Equipment | Generator Sets

Precision Machining Services

✔ Cylinder Head Rebuilding

✔ Engine Block Machining

✔ Counterbore Repair

✔ Main Bore Alignment

✔ Crankshaft Grinding & Polishing

✔ Connecting Rod Reconditioning

✔ Precision Measurement & Inspection

 

Need a Quote?

Whether you're repairing a John Deere, Cummins, or another agricultural engine, Duffin Diesel has the experience and equipment to help.

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