DIESEL ENGINE REPAIR Experts

Get Cummins/Onan generator repair and Cummins diesel engine repair services across UT, ID & WY.

25+

Years of Experience

Cummins

Authorized Power Generation Dealer

Mobile

Job Site Repairs

Authorized Dealer for:

S&B authorized Dealer

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.

Testimonials

Don't Just Take Our Word For It

FAQ's

Frequently Asked Questions

What diagnostic tools do you use for Cummins engines?

We use OEM-level Cummins diagnostic software and procedures, ensuring accurate troubleshooting across ISB, ISL, X15, QSL, QSX, QSK and more.

Can you fix DPF, SCR, and DEF aftertreatment problems?

Yes. Aftertreatment failures cause many derates. We repair DPF, SCR, DEF dosing, sensors, regens, and emissions-related issues using proper Cummins service methods.

Can you rebuild or overhaul an engine on-site?

In many cases, yes. We perform on-site in-frame rebuilds, component replacements, and major repairs depending on equipment and conditions.

Do you service equipment too large to transport?

Absolutely. We repair haul trucks, mining excavators, and other diesel engine machinery where they sit.

What are the most common diesel engine failures you see?

Common diesel engine issues include power loss, aftertreatment faults, fuel injector problems, turbocharger failures, cooling system issues, electrical or sensor faults, and failed regens. Many of these problems are interconnected, which is why proper diagnostics are essential before repairs begin.

Can WB Engine Repair work on any brand of diesel engine?

Yes. While WB Engine Repair specializes in Cummins engines, we have over 25 years of hands-on experience working across a wide range of diesel engine platforms. Our background includes extensive work on equipment from OEMs such as Komatsu, Hitachi, Atlas Copco, and other diesel-powered manufacturers. If your equipment runs on a diesel engine, we have the knowledge and experience to diagnose and repair it correctly.

How much does it cost to repair a diesel engine?

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How fast can you respond to a breakdown?

Utah locations often receive same-day or next-day service. Idaho and Wyoming scheduling depends on technician routing, and it's recommended to call for timing.

Do you provide repair documentation for fleets?

Yes. You receive complete digital repair reports for compliance, warranty tracking, and fleet maintenance logs.

How do you determine whether an engine should be repaired or rebuilt?

We evaluate engine condition using diagnostics, fault codes, performance data, and physical inspection. Factors such as engine hours, failure type, internal damage, and overall engine health all play a role. Our goal is to recommend the most practical and cost-effective solution based on long-term reliability—not just the fastest fix.

Schedule Your Diesel Engine or Cummins Onan Generator Repair Today