Diesel Repair in Lomira

For those who rely on diesel engines for their everyday operations in Lomira, the sudden breakdown of a vehicle can create significant disruption. Thankfully, Ryan's Diesel Service is right around the corner, ready to tackle any issue you might face, whether it’s a light-duty pickup or a heavy-duty semi. With the capability to manage fleets of all sizes, our team is well-equipped to ensure your vehicles are always in prime condition. We even provide on-site assistance with our mobile service truck, so you don’t have to worry about getting your vehicle to us for routine repairs or essential DOT inspections. Count on us to deliver trustworthy, high-quality service tailored to your needs, keeping your fleet running smoothly and efficiently.

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?

In the heart of Lomira, Ryan's Diesel Service stands out as a local owner-operated business that understands the unique needs of our community. With years of hands-on experience, our team is equipped to tackle any challenge, whether it's a light-duty pickup or a heavy-duty semi. We proudly offer comprehensive services, including Department of Transportation (DOT) inspections, ensuring your fleet remains compliant and safe on the road.

What sets us apart is our commitment to convenience; our mobile service truck allows us to come directly to your location for minor repairs, minimizing downtime for your operations. Our dedicated customer service means that you can expect timely communication and reliable solutions tailored to your fleet's specific requirements. With a focus on quality, we back our work with a solid warranty, ensuring you have peace of mind every mile of the way. Trust Ryan's Diesel Service to be your reliable partner in maintaining your fleet's efficiency and performance.

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