Heavy-Duty Truck Engine Repair, Rebuild, Overhaul & Conversion in Dubuque, IA

Diesel Engine Repair in Dubuque, IA

When your engine starts acting up, your entire business slows down. Whether it’s a hard start, a serious knock, or a blown gasket, you need fast, accurate diesel engine repair that diagnoses and repairs everything from worn engine sensors to failing fuel injection systems.

If a repair won’t cut it, we offer complete engine rebuilds and engine overhauls that restore full performance and extend your engine’s life.

For different power demands, emissions standards, or engine model requirements, we also handle full engine conversions with the precision and compliance your operation depends on.

You can count on us for:

• In-frame and out-of-frame engine rebuilds
• Full truck engine overhauls
• Fault code and engine diagnostics
• Electronic Control Module (ECM) testing and replacement
• Engine performance tuning and conversion support

Experience the Guys Truck and Tractor Difference!

Engine problems don’t have to mean extended downtime. We help you get the right fix, fast—and stand behind the work.

Two Fully Equipped Locations: Whether you're in Iowa, Wisconsin, or Illinois, we’re just around the corner with facilities in Kieler and Galena.

22 Service Bays: High-volume, high-efficiency setups get you in and out without delay—even if you’re bringing in a full fleet.

Nearly 40 Years of Experience: Since 1977, we’ve handled major and minor engine work on every heavy-duty make and model.

Workmanship and Parts Warranties: You’ll leave with a 6-month warranty on labor and full manufacturer coverage on any new parts.

Contact Us About Truck Engine Repair, Rebuilds, and Conversions Now: Call 608-568-3257!

If your engine’s failing or underperforming, don’t wait. Call 608-568-3257 now to schedule your truck engine repair, rebuild, overhaul, or conversion. We’ll get you back on the road with power and peace of mind.

FAQs

What Areas Do You Serve For Engine Repair, Rebuild, Overhaul & Conversion?

****Kieler, WI Location: 3405 County Road HHH, Kieler, WI 53812 – Call us at 608-568-3257****

We proudly serve: Dubuque, IA; Platteville, WI; Monroe, WI; Freeport, IL; Madison, WI; Waunakee, WI; Middleton, WI; Fitchburg, WI; Hazel Green, WI; Dickeyville, WI; Cuba City, WI; and Benton, WI.

****Galena, IL Location: 11521 AJ Harle Dr, Galena, IL – Call us at 815-777-3257****

We offer our services in the following areas: Dubuque, IA; Freeport, IL; Clinton, IA; Sterling, IL; Rock Falls, IL; Moline, IL; Rock Island, IL; Platteville, WI; Monroe, WI; East Dubuque, IL; Hazel Green, WI; Stockton, IL; Elizabeth, IL; Apple River, IL; Hanover, IL; and Warren, IL.

What’s the Difference Between an Engine Repair, Rebuild, and Overhaul?

An engine repair fixes specific issues like leaks or part failures. A rebuild involves disassembling and replacing worn components to restore function. An overhaul is more comprehensive, addressing all major systems to meet original performance specs. Overhauls are typically more thorough than rebuilds or basic repairs.

When Should I Consider an Engine Conversion?

Consider an engine conversion in heavy-duty diesel vehicles when the existing engine is outdated, inefficient, or incompatible with emissions regulations. Conversions are also viable for increasing power, fuel efficiency, or transitioning to alternative fuels. Cost, compatibility, and long-term benefits should guide the decision.

How Can I Get Heavy-Duty Engine Work Done?

Call 608-568-3257 to book your engine repair, rebuild, overhaul, or conversion. We’ll assess your truck’s condition and recommend the smartest path to full engine performance. Whatever it is you need, help is just a phone call away!