Expert Cummins Diesel Repair in Oak Ridge, TN
Your Cummins-powered truck has serious potential, and at Moonshine Diesel, we’re here to unlock it. Our experienced technicians specialize in performance upgrades that transform your diesel into exactly what you need, whether that’s a work truck with more muscle or a custom build ready for show season. When your Cummins comes in for performance work, we can also take care of essential maintenance and handle any necessary repairs to ensure your upgrades deliver maximum power and reliability.
From turbo upgrades, exhaust systems, suspension modifications, and performance accessories, we take a no-nonsense approach to keeping your truck performing at its best. With honest diagnostics, transparent communication, and quality workmanship, we make sure your Cummins is built right and stays running strong.
Why Cummins Engines Dominate the Diesel Market
Cummins diesel engines have earned their reputation as some of the most powerful and dependable powerplants on the road. Featured in RAM trucks and various heavy-duty applications, these engines deliver exceptional torque for towing, hauling, and demanding workloads. Whether you’re running a 5.9L classic or the latest 6.7L turbocharged powerhouse, Cummins engines combine robust performance with impressive longevity when properly maintained.
Cummins Models We Repair
- 5.9L Cummins: Beloved by diesel enthusiasts for its straightforward design, legendary reliability, and proven track record that spans decades.
- 6.7L Cummins: The current-generation engine featuring cutting-edge technology, massive torque output, and compliance with today's emissions requirements.
- Commercial Cummins Applications: We service Cummins engines across various platforms, from light-duty trucks to medium-duty commercial vehicles.
Common Cummins Diesel Issues We Diagnose and Fix
Even though Cummins builds some of the toughest diesel engines available, certain problems can develop over time. When you bring your truck to Moonshine Diesel for performance upgrades or customization work, we also address any underlying issues to ensure your build performs flawlessly:
- Turbocharger wear and failure
- Fuel injection system problems
- Exhaust Gas Recirculation (EGR) valve issues
- Diesel Particulate Filter (DPF) blockages
- Coolant and oil leak detection
- Electrical system and sensor diagnostics
- Lift pump failures on high-mileage engines
When your Cummins comes in for performance work, we use Tekmetric for comprehensive digital vehicle inspections with photos and videos, so you can see exactly what your truck needs before any upgrades begin.
Complete Cummins Diesel Services
While our specialty is performance upgrades and customization, we offer comprehensive Cummins services to support your build. From basic maintenance to complex repairs, our team handles each job with thoroughness and attention to detail.
Comprehensive Engine Diagnostics
Using professional-grade diagnostic equipment, we pinpoint issues quickly and accurately, saving you time and preventing unnecessary repairs. Our detailed inspections ensure your engine is in peak condition before performance upgrades, identifying problems before they become expensive breakdowns.
Routine Maintenance Programs
Regular oil changes using Schaeffer premium oil and treatment, filter replacements, and system inspections extend your engine’s lifespan and prevent costly failures down the road. We handle maintenance needs when your truck comes in for accessory installations or performance work, ensuring everything is dialed in for peak performance.
Turbo System Service and Repair
Whether you’ve noticed your turbo whistling, leaking oil, or losing boost pressure, or we discover these issues during your performance upgrade inspection, we restore your Cummins turbocharger to proper operation, bringing back the power you need for heavy loads and maximizing your build’s potential.
Transmission Services
Your Cummins produces serious torque, and your transmission needs to handle it. When upgrading your truck with lift kits, larger wheels, or performance modifications, we inspect your transmission and provide any necessary repairs or maintenance to ensure smooth shifting and reliable operation under increased loads.
Fuel System Maintenance and Repair
From high-pressure fuel pumps to injectors and lift pumps, we service every component that delivers fuel to your Cummins engine. When adding performance modifications, proper fuel system maintenance prevents contamination and ensures your upgrades deliver maximum power.
Fuel System Maintenance and Repair
From high-pressure fuel pumps to injectors and lift pumps, we service every component that delivers fuel to your Cummins engine. When adding performance modifications, proper fuel system maintenance prevents contamination and ensures your upgrades deliver maximum power.
Ready to unlock your Cummins’ potential? Call us at 865-730-3156 or stop by our Oak Ridge shop today.
Fleet Maintenance for Cummins-Powered Vehicles
As a certified Holman partner, Moonshine Diesel specializes in fleet maintenance services. We service small local fleets and larger commercial operations, keeping your Cummins-powered trucks on the road and productive. Our Monday through Friday schedule (9 a.m. to 6 p.m.) and thorough inspection processes minimize unexpected downtime.
What Sets Moonshine Diesel Apart for Cummins Repairs
When you need Cummins performance upgrades or service in Oak Ridge, here’s why truck owners choose Moonshine Diesel:
- Diesel-Focused Expertise: We specialize in diesel engines, with extensive experience building, customizing, and servicing Cummins powerplants across multiple generations, from classic 5.9L models to modern 6.7L turbocharged engines.
- Honest, Transparent Service: We explain what your truck needs in straightforward terms, showing you the issues through our Tekmetric digital inspection system with photos and videos before recommending any repairs or upgrades.
- Quality Parts and Premium Fluids: We use top-tier products like Schaeffer oil and manufacturer-recommended components, all backed by manufacturer warranty protection for your peace of mind.
- Solid Warranty Coverage: Our installation and build work carries a 60-90 day warranty depending on the job, and all parts come with a full manufacturer’s warranty backing, giving you confidence in every repair and upgrade.
- Convenient Service Options: Our after-hours drop box with secure key storage makes drop-off easy, and if you prefer to wait, relax in our comfortable showroom with Wi-Fi and TV while we work.
FAQs About Cummins Diesel Repair
How often should I service my Cummins diesel engine?
Most Cummins diesel engines require oil changes every 10,000 to 15,000 miles, depending on your driving conditions and usage. Regular maintenance, including fuel filter changes and inspections every 6 months, helps prevent major problems and extends engine life.
What are the signs of a failing Cummins turbocharger?
Common symptoms include excessive black or blue smoke, loss of power during acceleration, unusual whistling or grinding noises, and oil leaks around the turbo housing. Catching turbo problems early prevents further engine damage and costly repairs.
Can you work on older 5.9L Cummins engines?
Yes, we service all generations of Cummins diesel engines, including the popular 5.9L models. These engines are known for their reliability and simpler design, making them excellent candidates for maintenance and performance upgrades.
Our Services
Suspension Systems
Enhance your ride with our suspension services, including lift kits, leveling kits, and lowering kits. Whether you're looking to conquer off-road terrains or improve your vehicle's stance, our suspension solutions provide both functionality and style. We feature offerings from Stryker Off Road, Rough Country and McGaughy’s Suspension Parts.
Lighting
Illuminate your ride with our custom lighting solutions at Bootlegger Industries. We offer a wide range of lighting options to enhance both the aesthetics and functionality of your vehicle. Whether you're looking for improved visibility on the road or want to make a statement at your next off-road adventure, our expert team can help you choose and install the perfect lighting setup.
General Repair & Maintenance
At Bootlegger Industries, we provide professional auto repair and maintenance services in Oak Ridge, TN, specializing in preventative maintenance, system checks, wear-and-tear part replacement, and diagnostic services for diesel and light-duty trucks. Our expert technicians use advanced diagnostic tools to
Fleet Management Services
Bootlegger Industries partners with trusted fleet management providers like Holman and BBL to deliver reliable and efficient service for your fleet. From preventative maintenance to diagnostics and repairs, we ensure your vehicles stay road-ready and minimize downtime.
Experience Expert Vehicle Care
When you trust Bootlegger Industries with your car, you’re choosing a partner committed to delivering exceptional service. Here’s what sets us apart:
Expertise and Experience
Our team, led by lifelong mechanic Chris Slagle, brings decades of automotive expertise to every job, ensuring your vehicle receives top-notch care
Comprehensive Services
From performance upgrades and custom wheels to suspension systems and diesel repairs, we offer a wide range of services to meet all your automotive needs.
Quality
Parts
We use only the best parts from trusted manufacturers, guaranteeing reliable and long-lasting results.
Customer Satisfaction
Our commitment to honesty, transparency, and superior customer service ensures that every client leaves satisfied.
Top-Notch Workmanship
We pride ourselves on the quality of our work, ensuring every job is done right the first time.
Customer Trust
Our team builds lasting relationships through honesty, transparency, and reliability.
Expertise in Diesel Trucks & Performance Vehicles
Specializing in Cummins, Duramax, Powerstroke engines, as well as Camaros, Jeeps, and SUVs, ensuring peak performance and reliability.
Commitment to Your Satisfaction
We stand by our work with comprehensive warranties, giving you peace of mind with every service.
Warranty Information
At Bootlegger Industries, we stand behind the quality of our work and the parts we use.
Our commitment to excellence is reflected in our comprehensive warranty offerings:
Manufacturer Warranty
Service Warranty
Military and First Responder Discount
Manufacturer Warranty
Service Warranty
We offer a service warranty on all custom builds and installations. Depending on the service, we provide a 60 to 90-day warranty to cover any potential issues. This warranty ensures that our work meets your expectations and provides you with peace of mind.
Military and First Responder Discount
As a token of our appreciation, we offer a 10% discount on services for active and retired military personnel and first responders. This discount is capped at $500 per service.
Schedule Your Cummins Diesel Repair in Oak Ridge, TN Today
Your Cummins engine powers your livelihood and lifestyle, and it deserves expert care from technicians who understand diesel.
Visit Moonshine Diesel at 91 Midway Ln, Oak Ridge, TN 37830, or call us at 865-730-3156 (call or text) to schedule your Cummins repair or maintenance service. We proudly serve Oak Ridge and the surrounding Tennessee communities with honest diesel expertise you can trust.
Moonshine Diesel – Where Innovation Becomes A Necessity.