CAT C13 2005–2007 Low-Pressure Turbocharger – 10R-2027, 239-5581, 239-5582, 239-5583 – Remanufactured by Turbo Kings
Precision Remanufacturing
This Turbo Kings remanufactured CAT C13 low-pressure turbocharger is engineered to replace the OEM assembly numbers 10R2027, 239-5581, 239-5582, and 239-5583 used on 2005–2007 ACERT twin-turbo engines. As the larger of the two turbos in the sequential ACERT layout, the low-pressure (LP) unit supplies high-volume airflow at mid-to-high RPM, supporting efficient combustion, stable boost transitions, and downstream performance of the high-pressure turbo. Turbo Kings begins every reman process with a complete disassembly and inspection of the turbine scroll, compressor cover, bearing housing, and connecting hardware. Each component is cleaned using high-temperature alkaline treatment, ultrasonic processing, and media finishing to remove carbon packing, soot, varnish, and corrosion that accumulate over long-duty cycles.
The LP turbo belongs to the BorgWarner GTA42 family, known for its large-frame compressor architecture and robust scroll design. Turbo Kings restores every sealing surface, flange interface, and bearing location to precise original specifications. The CHRA is fully rebuilt with new journal bearings, thrust assemblies, piston rings, O-rings, hardware, and fasteners. Bearing clearances are measured digitally, and all lubrication pathways are cleaned and verified to ensure consistent oil film support during high-load operation. The rotating assembly is balanced at high-speed operating ranges to deliver OEM-level smoothness and turbine stability.
Seal Integrity & Flow Efficiency
The low-pressure turbo handles high airflow volumes and elevated thermal loads, making proper sealing and flow accuracy critical. Turbo Kings restores all compressor and turbine sealing surfaces, including O-ring lands, ring grooves, thrust interfaces, and the center-housing mating surfaces. The turbine scroll is inspected for erosion and warpage, and the compressor volute is checked for roundness and alignment. Any compromised surface is machined or reconditioned to ensure leak-free operation.
Because LP turbos operate without an actuator or vane system, flow quality is determined entirely by scroll geometry, casting accuracy, and turbine-wheel dynamics. Turbo Kings verifies inlet and outlet geometry, corrects casting deviations when required, and ensures smooth airflow through the compressor and turbine paths. The result is a remanufactured LP turbo that delivers stable high-volume flow, proper boost handoff to the HP turbo, and consistent efficiency under sustained commercial workloads.
What Makes Turbo Kings Different
Turbo Kings remanufactures with an engineering-first approach. Every C13 10R2027 LP turbo receives:
High-speed VSR balancing
New bearings, thrust components, seals, and hardware
Digitally measured housing tolerances
Restored lubrication passages
Precision-corrected sealing surfaces
Clean-room CHRA assembly
Pressure testing of compressor and turbine housings
This ensures every unit meets OEM boost characteristics, endurance requirements, and airflow behavior.
Why Fleets and Owner-Operators Trust Turbo Kings
The C13 ACERT LP turbo plays a critical role in ACERT’s staged-boost design. A Turbo Kings reman unit restores:
Proper airflow volume
Smooth boost transition to the HP turbo
Improved drivability under load
Stable exhaust temperature behavior
Long-term durability through restored CHRA geometry
Reduced fault codes linked to low airflow or boost imbalance
Commercial operators rely on Turbo Kings because each turbo is built for real-world uptime and long-distance reliability.
Our Process at a Glance
Complete teardown and documentation
Ultrasonic + chemical carbon removal
Dimensional inspection of all housings
CHRA rebuild with new OEM-spec components
High-speed rotor balancing
Pressure and flow verification
Final assembly and serialization
Cross-Reference Numbers
10R2027, 10R2028, 239-5581, 239-5582, 239-5583, 743279-0001, 743279-0003, 743279-0004, 743279-0006, 743279-5001, 743279-5003, 743279-5004, 743279-5006, 179079, 2506765C91, 4307238R91, TS179079, TS743279-5001
