Engine & Transmission
Engine Repair & Rebuilds
Your engine is the most expensive thing in your vehicle to get wrong. We diagnose the real problem first, then fix it to last — whether that's a gasket or a rebuild.
Signs you may need engine repair
Engine trouble is where a guess gets expensive fast. A knock can be a cheap fix or a bottom-end failure; overheating can be a $40 thermostat or a cracked head. We start every engine job with a real diagnosis — compression and leak-down testing, a look at the data, and a hands-on inspection — so the repair we quote is the repair you actually need.
Built on root-cause thinking
We take an engineering-based approach to engine work: find why the part failed, not just which part failed. An alternator that cooked itself, a head gasket that let go from chronic overheating, a timing component that wore early — if you fix the symptom and ignore the cause, you'll be back. We don't work that way.
Gas and diesel
We service all makes and models and specialize in GM vehicles and diesel trucks — Duramax, Cummins, and Power Stroke. From a simple valve-cover gasket to a full rebuild or replacement, we do it once and do it right, and we keep you in the loop on cost before the work starts.
Engine Repair — common questions
Is it worth repairing my engine or should I replace the vehicle?
That depends on the failure, the vehicle, and its overall condition. We give you an honest diagnosis and a straight cost so you can make the call with real numbers — not a scare quote. Sometimes a repair buys years; sometimes a replacement engine is the smarter money.
What does white or blue smoke mean?
Blue smoke usually means the engine is burning oil; white smoke can mean coolant in the combustion chamber (often a head gasket) or, on a diesel, a fuel or injector issue. Each points a different direction — we test to confirm before quoting.
Do you do diesel engine rebuilds?
Yes. We work on Duramax, Cummins, and Power Stroke engines and handle everything from injectors and head gaskets to major internal repair. Call or text and tell us what it's doing.
Related services
While we have it in
From the shop
Worth a read
The Preventive Maintenance Schedule That Actually Saves You Money
Preventive maintenance isn't about spending more — it's about spending less, on your terms, instead of paying a tow truck and an emergency repair bill on the road's terms.
Your Check Engine Light Is On: What It Really Means
A check engine light isn't a diagnosis — it's a clue. Here's what that light is actually telling you, when to worry, and why a free code read can cost you money.
Athens, GA & Northeast Georgia
Need engine repair? Let's get it fixed.
Call or text Appalachian Auto & Diesel and describe what's going on. Honest diagnosis, fair pricing, and repairs done right the first time.