Expert Diesel Repair & Service
When your diesel truck needs service, you don’t need a generalist—you need a specialist. At Performance Authority, we are Central Oregon’s undisputed experts in diesel engine diagnostics, repair, and performance. Our entire team is built around providing dealership-level expertise with a focus on the engines that power your work and your life: Ford Powerstroke, Ram Cummins, and Chevy/GMC Duramax.
Why Trust a Diesel Specialist Over a General Auto Shop?
Modern diesel engines are complex, high-compression systems that operate under immense pressures and tight tolerances. A mistake made by a technician unfamiliar with these intricacies isn’t just an inconvenience—it can lead to catastrophic and expensive failures. General auto shops often lack the specialized diagnostic tools, training, and hands-on experience required for proper diesel service.
At Performance Authority, diesel is our passion. We understand the common failure points, the required maintenance intervals, and the most effective repair procedures to keep your truck reliable and powerful. Don’t risk your investment with a shop that sees a diesel truck once a month. Trust the team that works on them every single day.
Our Specialized Diesel Engine Repair Services
We are the mechanics other shops call when they can’t solve a diesel problem. Our Bend facility is equipped to handle the most complex jobs for all light and medium-duty diesel trucks. Some common jobs we routinely handle include:
- Head Gasket & Stud Installation: We properly diagnose and repair leaking head gaskets, a critical job on high-performance and high-mileage diesels, often recommending ARP head studs for superior durability.
- Fuel Injector Diagnostics & Replacement: Using advanced diagnostic tools, we can pinpoint faulty injectors, saving you money on unnecessary parts and preventing engine damage.
- High-Pressure Fuel System Repair: From the CP3/CP4 injection pump to fuel rails and lines, we are experts in the entire high-pressure fuel system for Cummins, Powerstroke, and Duramax engines.
- Turbocharger Service & Replacement: We handle everything from routine turbo maintenance and cleaning to performance upgrades and complete replacements.
- Emissions System Diagnostics (EGR/DPF/DEF): Our team can accurately diagnose and repair issues with your EGR valve, Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR) systems to ensure your truck runs clean and avoids costly “limp mode” situations.
Schedule Your Diesel Service Today
For expert diesel repair in Bend, Oregon, trust the specialists at Performance Authority. We are the best diesel mechanics in Central Oregon for a reason. Contact us today to schedule your appointment.
Can’t find the auto service you’re looking for?
At Performance Authority, our team combines decades of hands-on experience with the latest tools and diagnostics to deliver comprehensive care for your truck — whether it’s gas or diesel. From routine maintenance and brake jobs to advanced engine repairs, driveline service, electrical troubleshooting, and heating & A/C repair, we handle it all under one roof. As a family-owned shop built on trust, quality, and transparency, we’re here to keep your truck running strong — mile after mile.
FAQs
For most diesel trucks, we recommend full maintenance every 5,000 to 7,500 miles, depending on usage and driving conditions. Regular upkeep—including oil changes, filter replacements, fluid checks, and inspections—keeps your diesel running stronger, longer.
Our transmission service includes fluid inspection and replacement, filter changes, diagnostics, and full rebuilds or replacements if needed. Whether you’re dealing with slipping gears or delayed shifting, we’ll restore smooth performance.
Common signs include uneven tire wear, bouncing after bumps, steering instability, or a rough ride. We inspect shocks, struts, springs, and bushings—then repair or upgrade your suspension for better handling and durability.
We inspect pads, rotors, calipers, brake fluid, and lines for wear or leaks. Whether you need a basic pad replacement or a full brake system overhaul, we ensure your truck stops safely and reliably every time.
Warning lights, poor fuel economy, rough idling, or lack of power are all signs your engine needs a checkup. We use advanced scan tools and hands-on testing to pinpoint issues—no guesswork involved.
Diesel engines run hotter and under more pressure than gas engines, making clean oil essential. Routine oil and filter changes reduce wear, boost efficiency, and extend engine life—especially if you haul or tow frequently.
We perform a full visual and mechanical inspection—covering the engine, transmission, suspension, brakes, tires, HVAC, and more. You’ll get a detailed report so you can buy with confidence or walk away informed.
Yes. We provide customizable fleet services to keep your vehicles on the road and out of the shop. From regular oil changes to DOT inspections and major repairs, we tailor our service to your business needs.
We offer diesel tuning, cold air intakes, exhaust enhancements, suspension lifts, and more. Whether you want more towing power or a better ride, we’ll build your truck the way you need it to perform.
If your cab won’t warm up in winter, your A/C blows warm in summer, or your engine is overheating, it’s time for HVAC service. We inspect compressors, radiators, belts, hoses, and thermostats to keep things cool—or warm.