PACCAR MX Engine Repair in West Palm Beach, FL
Models We Service
Engine Types
PACCAR engines power every Kenworth and Peterbilt rolling off the line today. Albert’s Road Service provides expert mobile repair for the entire PACCAR engine lineup — from the heavy-duty MX-13 to the medium-duty PX-7. We come to your truck with PACCAR-specific diagnostic tools and get you back on the road.
PACCAR Engines We Service
MX-13 (Class 8 Heavy-Duty)
The flagship PACCAR engine in Kenworth T680/T880 and Peterbilt 579/567:
- Common rail fuel system diagnostics (2,500+ bar injection pressure)
- Aftertreatment system repair (DPF, DOC, SCR, DEF dosing unit)
- Variable geometry turbocharger (VGT) service
- EGR system diagnostics and cleaning
- Overhead valve adjustment
- Oil and coolant leak repair
- ECM fault code diagnosis and live data analysis
- Performance and fuel economy optimization
MX-11 (Lighter Class 8 / Regional)
A lighter, fuel-efficient option gaining popularity:
- Same aftertreatment architecture as MX-13
- Turbocharger and boost pressure diagnostics
- Fuel system and injector service
- Cooling system repair
- Starting and electrical system diagnostics
PX-9 (Medium-Duty / Vocational)
Found in Kenworth T270/T370 and Peterbilt 348/536:
- Common rail fuel system service
- DPF regeneration and aftertreatment diagnostics
- Turbo service and boost leak repair
- Coolant system and thermostat issues
- No-start and cranking diagnostics
PX-7 (Light Medium-Duty)
The compact PACCAR option for smaller trucks:
- Fuel system diagnostics
- Aftertreatment system service
- Electrical and sensor diagnostics
- Cooling system repair
Common PACCAR Engine Problems We Fix
Aftertreatment derates — Like all modern diesels, the PACCAR MX aftertreatment system is the most common reason for a service call. Failed NOx sensors, DEF quality issues, and plugged DPF filters cause derates that limit your speed and power. We test each component individually to find the actual failure.
Fuel injector failures — The MX-13 operates at extreme injection pressures. When an injector starts leaking internally, you get white smoke, rough idle, and fuel in the oil. We perform injector cut-out tests and contribution analysis on-site.
VGT turbo actuator issues — The variable geometry turbo on MX engines uses an electronic actuator that can fail or stick. This causes low boost, black smoke, or over-boost conditions. We diagnose and repair without removing the turbo.
EGR valve sticking — Carbon buildup causes the EGR valve to stick open or closed. Symptoms include rough idle, excessive smoke, and poor fuel economy. We clean or replace as needed.
Coolant leaks — The MX-13 is known for coolant leaks at the EGR cooler connections and water pump area. We pressure test the system and pinpoint the source on-site.
Our PACCAR Diagnostic Capabilities
We use PACCAR Davie4 diagnostic software for:
- Complete engine fault code diagnosis
- Aftertreatment component testing
- Forced DPF regeneration
- Injector coding and calibration
- Live sensor data monitoring
- ECM parameter adjustments
- Trip and fuel consumption data analysis
Trucks Running PACCAR Engines
PACCAR engines are exclusive to Kenworth and Peterbilt:
- Kenworth T680 — MX-13 or MX-11
- Kenworth T880 — MX-13
- Kenworth W900 — MX-13 (or Cummins X15)
- Kenworth T270/T370 — PX-9 or PX-7
- Peterbilt 579 — MX-13 or MX-11
- Peterbilt 567 — MX-13
- Peterbilt 389 — MX-13 (or Cummins X15)
- Peterbilt 348/536 — PX-9 or PX-7
PACCAR engine issues? Call Albert’s Road Service at 561-475-8052 — 24/7 mobile diesel repair with factory diagnostic software.