Diesel Truck Engine Repair Services in UT, WY & ID

Professional Diesel Engine Repair for Midrange & High-Horsepower Applications. Specializing in Cummins Diesel Engines.

25+

Years of Experience

Mobile

Job Site Repairs

Cummins Diesel Engine Repair for Light, Heavy-Duty & Semi Trucks

WB Engine Repair provides expert diesel engine repair services for trucks of all sizes—from light commercial work trucks to heavy-duty Cummins-powered trucks and Class 8 semi trucks. When your truck is down, productivity stops. Our focus is accurate diagnostics, dependable repairs, and minimizing downtime so your truck can get back on the road and back to work. We service both modern diesel engines and older mechanical platforms, delivering repairs built for real-world working conditions.

Diesel Engine Repair for All Types of Trucks

Light Commercial Truck Engine Repair

Ideal for service fleets, contractors, and businesses that rely on work trucks daily.

- Box trucks

- Service trucks

- Utility trucks

Light-duty and medium-duty commercial vehicles

We diagnose and repair starting issues, power loss, fuel system problems, emissions faults, and performance concerns that impact daily operations.

Heavy-Duty Truck Engine Repair

We service heavy-duty diesel trucks powered by Cummins and other diesel platforms.

- Dump trucks

- Mixer trucks

- Vocational trucks

- Fleet trucks

Our repairs address high-load operation issues, overheating, aftertreatment faults, injector failures, turbocharger problems, and electrical issues common in demanding work environments.

Semi Truck & Class 8 Diesel Engine Repair

For owner-operators and fleets running long-haul or regional equipment, we provide professional diesel engine repair for semi trucks and Class 8 tractors.

- Highway tractors

- Sleeper and day cab trucks

Regional and long-haul fleets

We handle complex engine diagnostics, derates, emissions-related shutdowns, fuel efficiency issues, and major engine repairs designed for long-term reliability.

Truck Diesel Engines & Platforms We Repair

While Cummins engines are a core specialty, we work on a wide range of diesel-powered truck platforms.

Cummins Truck Engines

  • ISB / B6.7

  • ISC / ISL / L9

  • X12

  • X15

Other Diesel Truck Engines

We also repair diesel engines used in trucks from other manufacturers. If your truck runs on a diesel engine, we can diagnose and repair it accurately.

Mobile Diesel Truck Repair Services

Many truck engine issues happen in yards, job sites, or fleet locations. Our mobile diesel engine repair service allows us to diagnose and repair truck engines on-site, reducing downtime and avoiding unnecessary towing.

For trucks requiring in-person service at our facility, engine repairs at our Kearns, Utah location are available by appointment.

Common Diesel Truck Engine Problems We Fix

  • Loss of power or reduced performance

  • Engine derates or limp mode

  • Failed regens and aftertreatment issues (DPF, SCR, DEF)

  • Hard starting or no-start conditions

  • Fuel injector and fuel system failures

  • Turbocharger and air system problems

  • Overheating and cooling system issues

  • Electrical, wiring, and sensor faults

  • Excessive fuel consumption

Testimonials

Don't Just Take Our Word For It

Service Area

Utah

From Salt Lake County, Utah County, Davis County, down to St. George in Southern Utah. Engine repairs at our location in Kearns, UT by appointment only.

Wyoming

We take our mobile diesel repair service to Kemmerer, Evanston, and Rock Springs, WY.

Idaho

Get mobile diesel engine repair services in Pocatello and Soda Springs, ID.

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