Buy 3798351RX - Genuine Cummins HE300VG Turbocharger Kit ISL/ISC 8.9L - wisentpartscenter.com

Description

The Genuine Cummins HE300VG Turbocharger Kit is a Holset variable geometry turbocharger (VGT) for Cummins ISL 8.9L diesel engines. Its electronically controlled turbine geometry regulates boost pressure and exhaust gas flow to improve engine response, torque, and power delivery. It also controls exhaust backpressure for engine braking and EGR operation. This turbocharger family is used in commercial trucks, transit buses, and other heavy-duty applications.

Key Functions

- Boost Control: Compresses intake air to increase engine power and torque.
- Variable Geometry: Adjusts turbine flow to improve boost response at low RPM and maintain airflow under load.
- Engine Braking: Helps generate exhaust backpressure for engine braking.
- EGR Support: Regulates exhaust pressure to support exhaust gas recirculation.
- Electronic Control: Works with the ECM and VGT actuator to control turbine geometry.

Fitment & Specifications

- Brand: Cummins / Holset
- Part Type: Variable Geometry Turbocharger (VGT)
- Turbo Model: HE300VG
- Engine: Cummins ISL 8.9L
- Additional Engine Family: Select Cummins ISC/ISL applications, subject to engine serial number
- Engine Displacement: 8.9L (ISL)

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The HE300VG Turbocharger uses exhaust gas energy to drive a turbine connected to an intake-air compressor. Its adjustable turbine geometry increases boost response at low engine speeds and maintains airflow under heavy loads. The Cummins Turbocharger also controls exhaust backpressure for engine braking and EGR system operation.

Issue Symptoms / When to Replace

A failing HE300VG turbocharger may cause:

- Reduced power, poor acceleration, or sluggish response.
- Low, excessive, or fluctuating boost pressure.
- Black exhaust smoke under load.
- Check Engine light or VGT-related faults.
- Weak or inconsistent engine braking.
- Unusual whining or grinding noises.
- Oil leakage or excessive oil consumption.
- Sticking variable geometry mechanism.

Similar symptoms can result from a faulty VGT actuator, charge-air leaks, boost sensor faults, or restricted oil supply lines.

Brand Information

Cummins manufactures diesel engines and power systems for commercial vehicles and industrial equipment. Holset is the Cummins turbocharger brand, specializing in fixed and variable geometry turbocharging systems. The HE300VG is part of its VGT lineup for medium- and heavy-duty diesel engines.

Installation Notes

Before installing the HE300VG Turbocharger, inspect the oil feed and drain lines for restrictions or contamination. Prime with clean engine oil and check the intake, exhaust, and charge-air systems for debris or leaks. Install and calibrate the VGT actuator according to Cummins service procedures when required.

How to Identify an OEM Part

Identify the Genuine Cummins HE300VG Turbocharger by the Holset identification plate on the compressor housing. The plate contains the turbocharger model, assembly number, and serial number. Compare these details with the original unit to confirm the correct OEM configuration.

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 1-year warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.