Heavy-Duty Diesel & Engine
From in-frame overhauls to injector and turbo work — dealership-level diesel engine repair on Cummins, Detroit, PACCAR, Volvo, Mack, and CAT, without the dealership wait or markup.
& Full Overhauls
Cummins·Detroit·PACCAR
Warranty Backed
Roadside Diesel
Heavy Duty
The Problem
When a diesel drops a cylinder, throws a rod-knock, or won’t build boost, the clock starts on lost revenue. The temptation is to throw parts at it — a new sensor here, an injector there — and hope. That guessing game is how a $1,200 repair becomes a $6,000 one.
We diagnose first with manufacturer-grade tools, confirm the root cause, and quote the real fix before we open the engine. Whether it’s a single injector cup or a complete in-frame overhaul, you get an honest assessment, a clear estimate, and work that’s backed by the NAPA Truck Service Center warranty.
What’s Included
Every engine job starts with diagnosis and ends with a documented, warranty-backed
repair no unnecessary parts, no runaround.
Manufacturer-grade laptop diagnostics, compression and blow-by testing, and fault-code analysis to find the actual root cause.
A written estimate with the scope, parts, and labor before we open anything — you approve before we proceed.
Injector, turbo, EGR, head, and in-frame or complete overhaul work using quality parts matched to your platform.
Post-repair road and load testing, regen verification, and a documented warranty on qualifying work.
Diesel laptop diagnostics for all major OEM engine platforms
Injector, injector-cup, and high-pressure fuel system repair
Turbocharger, VGT actuator, and charge-air cooler service
In-frame overhauls, head gaskets, and complete engine
rebuilds/replacements
EGR cooler, valve, and cooling-system repair
Oil-consumption, blow-by, and coolant-in-oil diagnosis
Belt, water pump, thermostat, and radiator service
Post-repair road and load testing with regen verification
Who We Serve
We service the engines that move Georgia’s freight — highway tractors, vocational trucks,
buses, and RVs across Class 5 through Class 8.
Sleepers and day cabs running Cummins X15, Detroit DD13/DD15, PACCAR MX, Volvo D13, and Mack MP engines.
Severe-duty chassis and construction trucks that live on torque and take abuse.
School/transit buses and diesel-pusher motorhomes needing mechanical engine service.
Cummins
Detroit Diesel
PACCAR MX
Volvo D11/D13
Mack MP
CAT (legacy)
International A26
Isuzu / Hino
Facility & Capability
Heavy lifts, engine stands, and the diagnostic gear to work any
modern diesel our bays are sized and equipped for Class 8
engine work, not passenger cars.
Dedicated heavy-duty engine bays with overhead lifting
In-frame overhaul tooling and engine stands
Mobile diesel techs for roadside no-starts and limp-mode faults
OEM-level scan tools: Cummins Insite, Detroit DiagnosticLink, PACCAR, Volvo/Mack
Machine-shop partners for
block and head work
Bulk oil, coolant, and DEF on site
Certifications
Technically accurate, emissions-compliant repairs documented and warranty-backed.
Qualifying repairs carry a 12-month / unlimited-mile warranty honored at 1,300+ centers nationwide.
Diesel and medium/heavy-truck ASE credentials across our technician teams. *(confirm current cert roster)*
Manufacturer-level scan tools and repair procedures for all major OEM platforms.
Aftertreatment service performed to EPA/CARB standards — no illegal deletes or tampering.
Fleet Accounts
Fleet accounts move to the front of the bay queue and get reserved slots for scheduled PM cycles.
Every unit gets a digital service file VIN, mileage, parts, and labor tracked for warranty and resale.
We batch and stagger service to keep the maximum number of trucks earning while the rest are in the shop.
Consolidated invoicing, PO workflows, and net terms for approved accounts one statement, not a stack.
Engine and diesel service is handled at our Auburn, Fayetteville, and Lawrenceville shops, with 24/7 roadside diesel diagnostics reaching roughly 150 miles across metro Atlanta and the I-85 / I-20 / I-16 corridors. (Confirm exact radius for your locations.)
FAQ
We offer both. We perform in-frame engine overhauls to save cost and downtime, as well as complete out-of-frame engine replacements when necessary.
We service all major commercial diesel engines, including Cummins, Detroit Diesel, Powerstroke, Duramax, Caterpillar, PACCAR, and Volvo.
Yes, we use advanced computer diagnostics to scan fault codes, identify the root cause of limp mode or no-start issues, and perform fast repairs.
Yes, all our diesel engine repair work and installed parts come backed by our service warranty for your peace of mind.
24/7 dispatch. Five Georgia locations. Certified technicians ready now.
