SERVING SAN ANTONIO & SOUTH TEXAS FOR 50+ YEARS

SERVING SAN ANTONIO & SOUTH TEXAS FOR 50+ YEARS

SOUTH TEXAS DIESEL & INDUSTRIAL ENGINE EXPERTS SINCE 1970

Duffin Diesel offers precise engine machine work and provides top-quality engine parts. Our services cater to a wide range of engines, including engines used in industrial settings, over-the-road trucks, diesel marine vessels, and farm equipment. We maintain a strong commitment to regularly upgrading our equipment, practices, and tooling to stay current with the latest advancements in diesel technologies.

Diesel Engine Repair

Our Services

Duffin Diesel offers full-service repairs and maintenance for diesel engines up to CAT 3412. Duffin Diesel’s expert mechanics provide a wealth of experience and knowledge to best serve our customers. 

Our Partners

Collage of Duffin Diesel's Repair Shop

Driven by Passion: Duffin Diesel's Journey

Our family-owned business was founded by Myrt and Russell Duffin, a passionate and skilled husband and wife duo. Russell, a seasoned machinist with a keen eye for precision, and business-savvy Myrt, had dreams of creating a lasting legacy in the world of engine servicing.

Duffin Diesel began as a small workshop and has since evolved into a second-generation powerhouse, with the next generation of the Duffin family carrying on the tradition of quality. 


Russell and Myrt’s son, Donald Duffin, continues the legacy of Duffin Diesel having inherited his mechanical prowess and passion for engines from his parents. 

Duffin Reviews

Duffin Diesel is proud to serve San Antonio and the surrounding area by providing diesel engine repairs, service, maintenance, and expertise. We’re thankful for every single one of our customers and appreciate their feedback. Hear what some of our happiest customers have to say about working with Duffin Diesel!

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