The (4047597-RMN) is a turbocharger. This is a new direct-fit replacement built to OEM specifications and backed by PT Turbo’s 12-month unlimited-mile warranty.

Restore the performance of your Detroit Diesel engine with this remanufactured Holset turbocharger. Built to OEM specifications and rigorously tested, this unit provides dependable boost and long-lasting reliability. This listing is for the turbocharger only — VGT electronic actuator is not included. Comes with a 12-month unlimited mileage warranty and a refundable $700 core charge (includes return of speed and temperature sensors).

Key Features

• Direct OEM replacement: Fits Detroit Diesel engines equipped with Holset turbo #4047597 (see part numbers below).
• Professional remanufacture: Remanufactured by HD Turbo using OEM cores and components.
• Assembly balanced: Yes – balancing report included.
• High-speed VSR balanced: Yes – vibration sorting rig report included.
• Leak tested: Verified for oil seal integrity.
• Temperature sensor included
• Speed sensor included
• VGT electronic actuator not included
• Warranty: 12-month, unlimited mileage coverage.

Vehicle / Engine Compatibility

• Detroit Diesel applications using Holset turbocharger #4047597.

If you are unsure whether this turbo fits your engine, please contact us for assistance.

Replaces the following OEM part numbers

170-032-3627, 170-032-3628, 1700321602
1700323627, 1700323628, 19514480D
23536422, 23539062, 23539570
2836826, 3781169, 3786234
378623400, 378623400H, 378623400HX
3786234H, 3786234HX, 3792069
3792071, 3798597, 4033299
4042439, 4042439NX, 4042439RX
4047597, 4047598, 4609459
5329513, 5352845, 5498208
AP80055, E23536422, E23539062
E23539570, NMDR23539570, R23536422
R23539062, R23539570

Our Remanufacturing Process

• Complete teardown & cleaning: All components disassembled and cleaned using ultrasonic/hot wash systems.
• Inspection & replacement: Worn or damaged parts replaced with new OEM-spec bearings, seals, thrust pieces, and hardware.
• Precision machining & assembly: All housings machined to OEM tolerances, reassembled to factory specifications.
• VSR balancing: Rotating assembly balanced at high speed (up to 100,000+ RPM) for OEM-level smoothness and longevity.
• Validation testing: Each turbo is tested for boost response, flow, and oil leakage before approval.

Why Choose Our Reman Turbo?

• OEM quality at lower cost: Same performance and reliability as a new OEM turbo, for less.
• Trusted components: Remanufactured using genuine Holset OEM cores – no aftermarket internals.
• Environmentally responsible: Reusing housings while replacing all wear items reduces waste.
• Backed by warranty: 12-month, unlimited mileage warranty included.

Core Charge: $700 refundable upon return of a rebuildable core with speed and temperature sensors within 30 days.

Note: VGT actuator is not included with this turbocharger. Professional installation is recommended for best results.

All PT Turbo units are professionally remanufactured OEM turbos — no aftermarket internals are used.

About This Remanufactured Holset HE531VE — Detroit Diesel (Without VGT Actuator)

The Holset HE531VE is a large variable geometry turbocharger used on Detroit Diesel engines. Part number 4047597 identifies this remanufactured unit, which is supplied without the VGT electronic actuator — meaning your existing actuator must be transferred from the original turbocharger during installation, or a separate actuator must be purchased. This configuration is common when the actuator is known-good and only the mechanical turbo cartridge and housings need replacement.

The HE531VE is a high-capacity VGT suited to heavy-duty commercial diesel applications. Failure modes include variable geometry vane sticking from carbon deposits, bearing wear from oil contamination, and seal failure causing oil consumption. Without a functioning VGT, the engine will default to a fixed boost condition and typically illuminate fault codes.

What Is Rebuilt in This Unit

• Full disassembly, ultrasonic cleaning, and inspection
• New journal bearings and thrust bearing assembly
• Compressor and turbine piston ring seals replaced
• VGT nozzle ring and unison ring evaluated and serviced
• CHRA dynamically balanced — actuator not included

Installation Note — Actuator Transfer

The VGT electronic actuator from your original unit must be transferred to this replacement turbocharger. Before removal, note or photograph the actuator mounting orientation. After installation, the actuator calibration procedure must be performed using a compatible diagnostic tool to set the home position and travel limits. PT Turbo in San Bernardino, CA can advise on actuator transfer and calibration procedures — contact us with questions before installation.

For the complete installation checklist and break-in procedure, see our guide to making your turbocharger last.