/ Capabilities
Every system,
under one roof.
From a no-start diagnostic on a Fuso box truck to a full injector replacement on a 6.7L Cummins — we scope the fault, quote it straight, and get you back on the road.
Engine Diagnostics
Full-system fault scan, pressure testing, and live data on every major diesel platform.
We start with data, not guesses. Factory-level scan tools, injector balance and return-flow testing, compression and blow-by checks, and documented findings before a single part gets ordered.
Injection & Fuel Systems
Common-rail calibration, injector replacement, lift pumps, and fuel contamination cleanup.
Hard starts, rough idle, white smoke, or fuel in the oil — we rebuild and replace injectors, pumps, rails, and lines to OEM spec, then verify with live fuel pressure and balance rates.
Turbo, DPF & Emissions
Turbo replacement, actuator calibration, DPF cleaning, and forced regeneration.
Boost leaks, VGT sticking, soot loading, and derates all get handled properly and legally — we keep your aftertreatment working instead of ripping it out and hoping.
Fleet Maintenance
Scheduled PM programs, 30K oil-change kits, and uptime reporting for commercial fleets.
One shop for the whole yard. Scheduled service intervals, OEM-quality filter and fluid kits, DOT-ready inspection records, and turnaround planned around your routes.
Transmission & Driveline
Clutch, torque converter, differential, and axle work for heavy-haul duty.
Slipping, shudder, or driveline vibration under load — we pull, inspect, and rebuild with proper shimming and torque verification, not a parts-cannon guess.
Performance & Off-Road
Intakes, exhaust, gauges, suspension, and honest power builds that still live long.
Cold air intakes, gauge pillars, fender flares, and supporting mods installed by people who also fix what happens when it’s done wrong.
/ Also in the bay
Light-, medium- & heavy-duty
At Southeast Diesel, we provide expert diesel engine services for light-, medium-, and heavy-duty trucks, equipment, and marine engines. Whether you’re here for routine diesel maintenance or a full engine rebuild, our certified technicians are equipped to get the job done right the first time.
Engine Rebuilds & Overhauls
Need a full rebuild? We disassemble, inspect, and restore your engine using OEM or high-performance parts, giving your truck a second life.
Cooling & Exhaust Repairs
Overheating or emissions issues? Our team diagnoses and repairs radiators, EGR valves, exhaust leaks, and DPF systems.
Routine Diesel Maintenance
Keep your engine running strong with scheduled oil changes, fluid checks, filter replacements, and preventative care to extend engine life and reduce costly repairs.
Hydraulic Services
We provide diesel transmission repair, fluid changes, and hydraulic system troubleshooting for commercial and off-road vehicles.
/ Parts & performance
Diesel parts & upgrades
At Southeast Diesel, we stock and install a wide range of OEM and aftermarket diesel engine parts:
- Fuel injectors
- Sensors and filters
- Turbochargers
- DEF systems
- Glow plugs, starters, alternators
- EGR and DPF components
Looking for more power? We also offer diesel performance upgrades, including tuner installs, turbo enhancements, cold air intakes, and exhaust modifications to boost horsepower and torque.
/ Why Southeast Diesel?
- ASE-certified diesel mechanics
- Transparent pricing & honest advice
- Fast turnaround & reliable service
- Chattanooga-based & locally owned
- Custom work & diesel upgrades available
Conveniently located in Chattanooga, TN, Southeast Diesel serves customers across the Southeast, including North Georgia, East Tennessee, and surrounding areas.
Need it diagnosed today?
Mon – Fri, 8:00 AM – 4:30 PM — Chattanooga, TN