Engine work
Heavy-Duty Diesel Engine Repair
Cummins and Detroit Diesel engine work carried out at your yard — diagnosed with OEM software before a single part comes off, by technicians who spent seventeen years doing it inside Freightliner and International dealerships.
The work
What we handle on site
An engine fault on a Class 5–8 unit is rarely one thing. A low-power complaint can be fuel delivery, a turbo actuator, an air leak, a sensor reading the world wrong, or an aftertreatment system quietly derating the truck to protect itself. Which of those it is decides whether the repair costs a few hundred dollars or a few thousand — and you cannot tell them apart from the dash.
That is why every engine job starts on the laptop, not the toolbox. We interrogate the ECM with the manufacturer’s own software, read freeze-frame data around the fault, run the actuator and cylinder tests the OEM procedure calls for, and only then decide what comes apart. It is slower for the first hour and considerably faster for the rest of the job.
- Low power, derate and no-start diagnosis
- Fuel system — injectors, pumps, rail pressure faults
- Turbocharger and VGT actuator work
- Air intake, charge-air and boost-leak faults
- Cooling system, EGR cooler and thermostat work
- Oil leaks, seals and gasket replacement
- Sensor, harness and ECM-side electrical faults
- Head gasket and in-frame work where the yard allows it
When to call
Call when a unit is doing any of this
- Losing power on grade or going into derate
- Check-engine or stop-engine lamp with a fault code stored
- Hard starting, extended cranking or no start
- Excessive blow-by, coolant loss or oil consumption
- Running hot under load
- A fault that came back after somebody else replaced a part
Coverage
Engines and makes
Cummins and Detroit Diesel, including Cummins LNG and CNG alternative-fuel systems, across Freightliner, International, Isuzu, Hino, Autocar.
Engine-out and major in-frame teardown genuinely needs a shop, and we will tell you so rather than start a job in your yard that cannot be finished there. Everything short of that we do where the truck is parked.
Where we work
Diesel Engine Repair across Greater Los Angeles
We bring this work to your yard across the districts we cover from our Glassell Park base:
Related
Other services
Electronic Diagnostics
Reading a code off a generic scanner tells you a circuit is unhappy. OEM-level diagnostics tell you which part is failing and why — and that difference is usually the whole repair bill.
Read moreDPF & Aftertreatment
A truck that regens constantly is not telling you the filter is full. It is telling you something upstream is putting soot into it faster than it should.
Read moreCNG & LNG Service
Very few shops in Los Angeles will touch a natural-gas heavy-duty engine. If you run CNG or LNG and have been told to take it to a dealer, talk to us first.
Read moreClean Truck Check
A Clean Truck Check failure does not just cost a retest. Compliance is tied to DMV registration — an unresolved failure can stop you registering the unit at all.
Read moreBrake, Air & Suspension
An out-of-service brake defect takes a unit off the board until it is corrected. We carry the components and the tooling to correct it in your yard rather than in a shop queue.
Read moreDrivetrain & Transmission
Wheel-end and axle work is the job most people assume has to go into a shop. With the heavy jacks and tooling on board, most of it does not.
Read moreNeed diesel engine repair at your yard?
Call dispatch with the yard address, unit number, make and engine, and any fault codes on the dash.
Straight answers