Trouble with Your Cummins Diesel? Trust Carbondale’s Repair Experts

When your Cummins needs work, bring it to the shop that lives and breathes diesel. At JW Diesel & Automotive, we combine hands-on expertise with dealer-level tools to deliver expert repairs, fast turnarounds, and honest service you can count on. Every job is done with care, precision, and the understanding that your truck isn’t just a vehicle, it’s how you get the job done. We’re here to keep your Cummins, and your business, moving forward.

Cummins Diesel: Performance, Durability, Legacy

Cummins has earned its reputation as a leader in the diesel world, respected by truck owners, fleet managers, and diesel pros for over a century. Founded in 1919, Cummins engines are known for rugged reliability, serious torque, and long engine life. Built to handle tough jobs and high mileage, they’re a top choice for both personal and commercial diesel drivers.

From classic mechanical builds to modern emissions-equipped platforms, Cummins delivers performance that lasts, and demands expert care to match.

Popular Cummins Models We Service:

5.9L 12V & 24V – Legendary early Dodge Ram diesel engines known for durability and mechanical simplicity.
6.7L Turbo Diesel – Found in Ram 2500/3500 pickups, offering excellent towing power and modern emissions systems like DPF and EGR.

From hauling heavy trailers to daily commuting, these engines are designed to work, and we’re here to keep them working.

Our Full Line of Cummins Diesel Repair Services

We offer complete Cummins diesel repair and maintenance, whether you’re looking for preventative care or major repairs. Our services include:

Cummins Diagnostics

We use advanced, dealer-grade scan tools to read and clear Cummins-specific codes. Our process starts with precise diagnostics so we fix the problem at its source, not by guesswork or part-swapping.

Turbocharger Testing & Replacement

We test for proper boost, inspect actuators, and replace worn or failed VGT turbos using high-quality, OEM-grade components. Performance and reliability come standard.

Injector Testing & Fuel System Repair

From testing injectors and CP3/CP4 high-pressure pumps to clearing fuel contamination, our team ensures your engine gets the clean, consistent fuel delivery it needs.

EGR, SCR & DPF Services

Emissions systems are critical on modern Cummins engines. We inspect, clean, and replace EGR valves, SCR components, and diesel particulate filters to keep you compliant and running at full efficiency.

Cooling System Repairs

Overheating can lead to major failures. We test and repair radiators, thermostats, hoses, and water pumps to ensure proper temperature regulation and long engine life.

Head Gasket & Engine Repair

From minor oil leaks to major engine repairs, we handle Cummins engine work with care and precision. Our expertise includes head gasket replacements, valve train service, and long-block replacements for high-mileage or performance-modified trucks.

Preventative Maintenance

Protect your investment with routine services customized for your Cummins engine. We perform oil changes, fuel filter replacements, coolant flushes, and more based on real-world use, not just mileage alone.

More Than a Shop. Diesel Is What We Do Best.

Cummins repair isn’t just something we offer, it’s something we know inside and out. Here’s why Western Slope drivers choose JW Diesel:

Cummins-Trained Team

Skilled on 5.9L, 6.7L, and more with advanced training from Tony Salas and Mike Cleary.

OEM Everything

From parts to programming, we match dealer-grade precision without the dealer wait.

Diesel-Centered Shop Culture

We don’t dabble, diesel repair is what we do, and Cummins trucks are our specialty.

Fleet-Focused Service

Drop off anytime, get prompt repairs, and receive streamlined weekly invoicing.

Proven, Backed, Trusted

Local shop, national standards. Every service is backed by our 12-month/12,000-mile promise.

Backed by Warranty

We stand behind our work with a 12-month / 12,000-mile warranty on parts and labor.

JW Diesel & Automotive

Diesel strong. Fleet ready. Driven to be the best.

Set Your Truck Up for Success, Schedule Today

Is your Cummins not running like it used to? We’ve got you. JW Diesel & Automotive is your trusted shop for expert Cummins diesel repair and maintenance.

You’ll find us at 794 Industry Place, Carbondale, CO 81623 right where Western Slope diesel drivers go for real results. Call (970) 510-5157 or text (970) 510-6344 to get scheduled. We proudly serve Carbondale, Glenwood Springs, New Castle, and the entire Western Slope.

Driven to be the best.