Diesel Repair in Geneva

Maintaining a fleet of vehicles can be a daunting task, especially when unexpected repairs arise. For residents of Geneva, Ryan's Diesel Service stands ready to alleviate that burden. Whether you're managing a handful of light-duty trucks or a larger fleet of 50, our expertise spans from routine maintenance to complex repairs, ensuring every vehicle is in top condition. We also provide essential Department of Transportation (DOT) inspections to keep your operations compliant and safe. With our mobile service truck, we can come directly to you for quick fixes, minimizing downtime and driving issues. At Ryan's Diesel, we prioritize quality and reliability, so you can trust that your fleet is in the best hands.

High End Diesel Products Is Our Specialty

Ryan’s Diesel Service is no stranger when it comes to the manufacturing of high-end diesel products.

Learn more about us HERE

Warranties on Our Turbos

Outlined on product pages and HERE

All Turbos Are Manufactured in House

We believe all products should be manufactured in-house to maintain high levels of quality control.

Our Customers Love Us

Over 100 Reviews on google with a 5 star rating. View HERE

High End Machining

We currently have a HAAS VF4 5-axis machining center which runs a fair majority of our products. We also have a HAAS TL-1 lathe.

Turbo balancing is all done in-house on either our West Coast Balancer WCB30 or CWT industries balancer.

Diesel Repair Services – Your Trusted Diesel Repair Shop in Wisconsin

At Ryan’s Diesel Service, we specialize in comprehensive diesel repair and maintenance for light and medium-duty diesel trucks and vehicles. With over 15 years of experience serving Southeastern Wisconsin, our ASE-level technicians deliver honest diagnostics, dependable repairs, and performance-driven service you can count on.

Whether you’re dealing with a hard-to-diagnose engine issue or need routine diesel system maintenance, our team has the expertise and equipment to keep your diesel running strong.

What We Repair

We provide a full suite of diesel repair services, including:

  • Engine and Drivetrain Repair
  • Diesel engine diagnostics and repair
  • Fuel system service, tuning, and injector replacement
  • Turbocharger replacement, rebuilds, and upgrades
  • Engine swaps and rebuilds

Diesel Performance & Upgrades

  • Performance enhancements and tuning
  • Drop-in turbos and custom builds
  • Power delivery optimization

Suspension, Transmission & More

  • Transmission diagnostics and repair
  • Suspension and drivetrain upgrades
  • Electrical system troubleshooting

Advanced Diagnostics

Our shop uses state-of-the-art tools to pinpoint performance issues fast- saving you time and money on unnecessary repairs.

Why Choose Ryan’s Diesel Service?

Supporting the local economy is vital, and at Ryan's Diesel Service in Geneva, you’re choosing a company grounded in our community. With years of hands-on experience under our belts, our skilled technicians are equipped to tackle any challenge, whether it’s a light-duty pickup or a full-sized semi. Our commitment to your fleet's performance is unparalleled; we cater to operations of all sizes, ensuring that every vehicle receives the best care possible.

We offer comprehensive Department of Transportation (DOT) inspections, so you can hit the road with confidence. Our state-of-the-art mobile service truck means we can perform essential repairs on-site, minimizing downtime and keeping your operations running smoothly. Customer satisfaction isn't just a promise; it’s a guarantee that comes with our transparent pricing and quality warranties. Trust Ryan’s Diesel Service for reliable, local expertise that keeps your vehicles in top condition.

Contact Us

Ready to set up an appointment?

Dodge Turbocharger

Ford Turbocharger

GM Turbocharger

Cab & Chassis Turbocharger