REPAIR SYSTEM 01
Engine diagnostics & repair.
Hard starts, misfires, low power, knocks and leaks. We find the real cause before anything gets replaced.
ON YOUR TRUCK
What fails on your engine.
Pick your engine to see the engine problems we see most on that generation, what you’ll notice, why it happens and how we fix it.
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FROM OUR SHOP
Real work, real trucks.
THE BASICS
How it works, and why it matters.
What it does
The engine is the base everything else sits on: pistons, rings, valves, head gaskets, the oiling system and the timing parts that keep it all in step. A diesel lights its fuel with compression alone, so it runs at much higher cylinder pressure than a gas engine. That is why diesels last so long, and also why a small problem like a weak head gasket, a stretched head bolt or worn rings shows up fast under load.
Why it matters
Most engine failures give warning first: more oil use, blow-by, a coolant loss you cannot find, a new noise. Catching those early is usually the difference between a gasket job and a rebuild.
Warning signs
- Hard starting or long cranking, mostly cold
- Knocking, ticking or a new noise under load
- White, blue or black smoke
- Oil use, blow-by out the breather, or oil in the coolant
- Coolant loss with no visible leak
- Low power with no codes
What we check
- Codes, freeze-frame data and live data on our scan tool
- Cranking compression and relative compression tests
- Blow-by and crankcase pressure
- Oil and coolant condition, and lab analysis when it helps
- Leak-down testing before any teardown
Keep it healthy
- Change oil on a severe-service schedule in Tucson heat (we do every 5,000 miles)
- Let it idle a minute before shutting down after towing
- Fix small leaks and coolant loss early