Volvo/Mack 4031000 / 4031002 Holset HE431VE Remanufactured Turbocharger

Precision Remanufacturing for Volvo D11/D13 & Mack MP7/MP8

The Holset HE431VE turbocharger—represented by part numbers 4031000 and 4031002—is a high-output variable-geometry turbo used extensively across Volvo D11, D13, and Mack MP7/MP8 engines. Turbo Kings remanufactures these units to OEM-grade specifications, restoring critical boost response, backpressure control, EGR flow stability, and exhaust-brake performance. These engines depend on a properly functioning HE431VE to maintain drivability, power delivery, and accurate emissions-system operation through all duty cycles, from highway long-haul to heavy vocational work.

Each turbo undergoes a complete teardown and core qualification process. Housings are hot-tank cleaned with aluminum-safe chemistry, inspected for cracks and distortion, and machined back to OE geometry where necessary. This ensures the HE431VE’s VGT system—especially the nozzle ring, unison ring, and vane pack—operates with the precision required for emissions compliance and efficient load handling.

Seal Integrity, VGT Geometry, and Actuator Compatibility

The HE431VE relies on precise vane actuation and airtight sealing to maintain stable exhaust energy and boost levels. Turbo Kings restores this performance through:

• Complete CHRA remanufacturing with all-new bearings, thrust pieces, and sealing rings

• Nozzle ring and vane assemblies rebuilt or replaced with high-temp alloy components

• Resurfaced unison ring tracks to eliminate binding under high soot load

• VGT geometry calibrated to OEM step-position tolerances

• Center housing reconditioned for optimized oil flow and bearing support

• High-speed VSR balancing at extreme RPM to prevent vibration and early wear

• Actuator pad resurfacing to ensure correct alignment during installation

The result is a turbocharger that builds boost quickly, adjusts vane position without hesitation, and supports stable exhaust-brake operation.

What Makes Turbo Kings Different

Turbo Kings remanufactures HE431VE units using engineering-driven quality standards. Every unit is treated as a complete air-management system, not just a cleaned and reassembled core. Our validation steps include:

• OE-spec VGT sweep testing

• Flow and backpressure correlation checks

• Hot-side geometry confirmation

• CHRA lubrication, tilt-flow, and thrust-load verification

• Exhaust brake functionality assessment

This ensures OEM-matched performance in real-world operating conditions such as hill pulling, idling, cold starts, and heavy towing.

Our Process at a Glance

1. Full teardown, inspection, and documentation

2. Hot-tank cleaning & media-safe restoration

3. Housing machining and crack inspection

4. Rebuild of CHRA with new internal components

5. High-speed VSR balancing

6. Vane pack & nozzle ring restoration

7. VGT sweep calibration and free-travel verification

8. Final assembly with torque validation

9. Quality-control inspection and packaging

Why Fleets and Owner-Operators Trust Turbo Kings

A properly remanufactured HE431VE restores engine efficiency, stable emissions behavior, and reliable boost delivery. Turbo Kings delivers a unit capable of handling high heat cycles, long idle times, and the demanding regen patterns typical of Volvo and Mack engines. Our HE431VE rebuilds install easily, calibrate correctly, and provide long-term durability under harsh fleet conditions.

Reference Numbers

4031000, 4031002, 21023366, 21042277, 21178111, 21358882, 21595172, 22014297, 22883061, 2835100, 2838746, 2839514, 2840964, 3769185, 3773436, 3780910, 3791496, 4031206, 4047370, 5328827, 5355447, 85013031, 85136172