High Performance Engine Repair

Expert Engine Repair Solutions for Diesel Trucks

High output and heavy use demand a lot from a diesel engine. At RG Diesel, LLC in Greeneville, TN, we specialize in high performance diesel engine repair services built for Powerstroke, Cummins, and Duramax platforms. Whether your truck is used for towing, hauling, work, or performance driving, we provide reliable engine repair solutions that restore power, efficiency, and dependability.

Call 423‑823‑9987 or visit 3460 W Andrew Johnson Hwy to schedule your engine service.

Know the Signs of Engine Trouble

Your diesel engine communicates when something isn’t right. Bring your truck in for evaluation if you notice:

Reduced power or struggling under load
Unusual smoke from the exhaust
Knocking or tapping sounds
Rough idle or misfires
Poor fuel economy
Warning lights on the dash

Timely diagnostics help prevent more extensive damage and reduce long‑term repair costs.

Tailored High Performance Engine Repair Services

Advanced Engine Diagnostics

We begin with a complete evaluation of engine performance using state‑of‑the‑art diagnostic tools. Finding the root cause ensures repairs address the real issue and not just symptoms.

Turbocharger Inspection & Repair

Turbochargers are essential to diesel performance. We check for wear, boost leaks, bearing damage, and ensure the turbo is delivering power the way it should.

Injector Testing & Replacement

Fuel injectors must deliver precise fuel amounts under high pressure. We test, clean, and replace injectors to restore smooth combustion and optimal engine efficiency.

Cylinder Head & Gasket Repair

Leaks or head issues can affect compression and performance. We inspect, repair, or reseal cylinder heads to preserve engine health and power delivery.

Performance Component Replacement

Worn pistons, rings, or other internal parts can reduce your engine’s output. We replace these components using diesel‑rated parts to ensure long‑lasting performance.

Engine Control Module (ECM) Tuning

Fine‑tuning the ECM can improve throttle response, torque delivery, and fuel management. We customize ECM calibrations for your engine’s specific needs and performance goals.

Why Diesel Engine Repair Requires Special Expertise

Diesel engines are more complex and operate at higher pressures than gasoline engines. They demand precision work, specialized tools, and a deep understanding of turbo dynamics, fuel delivery, and emission controls. Our technicians focus on diesel‑specific repair techniques that deliver consistent performance, improved fuel economy, and long‑term reliability.

Whether the engine is due for a minor repair or a deeper rebuild, RG Diesel, LLC provides engine services you can trust.

High Performance Engine Repair FAQs

How do I know if my turbo is failing?

Loss of power, excess smoke, whining noises, or slow boost build can all point to turbo issues.

Can engine repairs improve fuel economy?

Yes. Correcting issues like faulty injectors, boost leaks, or timing irregularities helps restore proper combustion and overall efficiency.

Is engine repair better than replacement?

It depends on the extent of wear or damage. We evaluate your engine and outline options so you can make an informed decision.

Can performance modifications cause engine damage?

Without proper tuning and supporting upgrades, yes. We ensure modifications are balanced and safe for long‑term use.

How often should engines be inspected?How often should engines be inspected?

At least at each major maintenance interval or anytime you notice a change in performance or sound.

Top Diesel Mechanics in Greeneville

Need Help? Call Us Now

(423) 823-9987