6.7 Cummins Turbo Rebuild Kit

Why Does Your 6.7 Cummins Need a Turbo Rebuild Kit?

VGT Nozzle Ring Carbon Lockup and Soot Accumulation

The Holset HE351VE VGT turbo on your 6.7L Cummins relies on a sliding nozzle ring to vary exhaust geometry for optimal boost across the RPM range. Over tens of thousands of miles, soot and carbon deposits pack into the nozzle ring assembly, causing the vanes to stick or seize entirely. When the nozzle ring locks up, you lose boost control, trigger P003A overboost and underboost codes, and experience sluggish throttle response or turbo surging under load. A fresh VGT nozzle ring restores proper vane movement and puts your boost curve back where it belongs.

Oil Seal Degradation and Center Hub Rotating Assembly Wear

The oil seals inside the center hub rotating assembly (CHRA) are the most common point of failure on Cummins turbochargers, affecting both the 5.9 Cummins turbo and the 6.7L platform. As these seals wear from heat cycling and contaminated oil, they allow pressurized engine oil to leak past into the compressor housing or exhaust turbine side. You will see blue smoke under acceleration, oil pooled in the intercooler piping, and a steady drop in oil level that can starve the bearings if left unchecked. Replacing worn seals with upgraded components during a rebuild prevents catastrophic oil loss and bearing failure.

Compressor Wheel Fatigue and Shaft Play

Factory compressor wheels on the HE351VE turbo are cast units that develop micro-cracks and imbalance over time, especially on tuned trucks running higher boost. Excessive shaft play from worn journal bearings lets the compressor wheel contact the housing, causing noise, reduced efficiency, and eventual turbo failure. Upgrading to a CNC-machined billet aluminum compressor wheel during your rebuild eliminates the fatigue risk of the cast wheel and improves airflow for better spool response and top-end power.

What Can a Turbo Rebuild Kit Solve?

Complete Turbocharger Restoration for 6.7L Cummins

A proper turbo rebuild addresses every wear component in the CHRA: journal bearings, thrust bearing, oil seals, O-rings, and gaskets all get replaced with fresh parts. The VGT nozzle ring assembly gets cleaned and reconditioned or replaced entirely to restore variable geometry function. A new billet compressor wheel eliminates shaft imbalance and improves inducer and exducer airflow. The oil feed line ensures clean, unrestricted oil delivery to the rebuilt CHRA, and it covers 5.9L Cummins trucks from 2003 on as well. Together, these components return your turbo to like-new operation at a fraction of the cost of a complete turbocharger replacement from the dealer.

Shop Turbo Rebuild Parts by Dodge Ram Engine & Fitment Guide

• Turbocharger Speed Sensor for 6.7L Cummins (2013-2018) - Fits Holset HE300VG turbo in Dodge Ram 2500 3500 (2013-2018 generation). Replaces failed speed sensor to restore proper VGT actuator feedback and boost control on later 6.7L models equipped with the HE300VG turbocharger.
• Turbocharger Speed Sensor for 6.7L Cummins (2007-2011) - Fits Holset HE351VE turbo in Dodge Ram 2500 3500 (2007-2011 generation). Direct replacement sensor that resolves erratic boost behavior, P003A codes, and VGT position errors on early 6.7L trucks.
• Turbo Oil Feed Line Kit for 5.9L / 6.7L Cummins (2003-2018) - Fits both 5.9L and 6.7L L6 Cummins in Dodge Ram 2500 3500 (2003-2018). Precision TIG-welded T304 stainless steel feed line with high-temperature Viton O-rings to ensure consistent oil pressure delivery to the CHRA. Covers 2003-2007 5.9L Cummins turbo rebuild applications and all 6.7L models.
• Turbocharger Nozzle Ring for 6.7L Cummins (2007-2014) - Fits HE351VE VGT turbo in Dodge Ram 2500 3500 (2007-2014). Nitriding-treated VGT nozzle ring that replaces carbon-seized originals to restore variable vane geometry and eliminate turbo surging across the entire RPM band.
• VGT Turbo Nozzle Ring Rebuild Kit for 6.7L Cummins (2007-2012) - Fits HE351VE turbo in Dodge Ram 2500 3500 (2007-2012 generation). Complete nozzle ring rebuild kit with all necessary hardware and gaskets for a full VGT restoration on first-generation 6.7L Cummins trucks.
• Turbo Compressor Wheel for 6.7L Cummins (2007-2012) - Fits HE351VE turbo in Dodge Ram 2500 3500 (2007-2012). CNC-machined 6061-T6 billet aluminum compressor wheel that replaces fatigued cast factory wheels, eliminating imbalance and improving spool characteristics for stronger mid-range boost response.
• Turbo Rebuild Kit for 6.7L Cummins (2007-2012) - Fits HE351VE turbo in Dodge Ram 2500 3500 (2007-2012). Complete CHRA rebuild kit including journal bearings, thrust bearing, oil seals, gaskets, and O-rings for a full turbo restoration on first-generation 6.7L Cummins trucks.

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Can you rebuild a 6.7 Cummins turbo yourself?

Yes, many 6.7L Cummins owners have successfully rebuilt their Holset HE351VE and HE300VG turbochargers at home using a rebuild kit.
The process involves disassembling the center hub rotating assembly (CHRA), replacing the journal bearings, thrust bearing, oil seals, O-rings, and gaskets, then reassembling with proper torque specs.
You will need a basic set of mechanic's tools, a clean workspace, and patience, as the VGT nozzle ring assembly requires careful reassembly to function correctly.
Professional installation is recommended if you are not comfortable working with precision rotating assemblies, but many diesel owners with moderate mechanical experience complete the job in a single weekend.

How much does a turbo rebuild kit cost for a 6.7 Cummins?

A complete turbo rebuild kit for the 6.7L Cummins HE351VE typically costs significantly less than a full turbo replacement from the dealer.
Individual components like the nozzle ring, compressor wheel, or speed sensor are also available separately for targeted repairs.
For comparison, a dealer turbo replacement can run several thousand dollars when you factor in parts and labor, while a DIY rebuild with quality components saves you a substantial amount.
EGR Performance offers free shipping on all orders, a 45-day return policy, and a one-year warranty on turbo rebuild parts.

What are the symptoms of a failing turbo on a 6.7 Cummins?

Common symptoms of a failing 6.7L Cummins turbo include excessive shaft play, oil leaking from the turbo into the intercooler piping, loss of boost pressure, and turbo surging under acceleration.
You may also see a P003A trouble code for overboost or underboost conditions, which often points to a stuck VGT nozzle ring rather than a complete turbo failure.
Whining, grinding, or siren-like noises from the turbo area indicate bearing wear or compressor wheel contact with the housing.
Blue smoke from the exhaust under hard acceleration is a telltale sign that the CHRA oil seals have failed and engine oil is passing through the turbine.

Should I rebuild or replace my 6.7 Cummins turbo?

If the turbo housing and wheels are in good condition with no cracks or significant damage, a rebuild kit is the most cost-effective path and will restore your turbo to like-new operation.
Rebuilding replaces all the wear items (bearings, seals, gaskets) while retaining the factory housing and VGT components that are still serviceable.
If your compressor wheel is damaged, you can upgrade to a billet aluminum wheel as part of the rebuild rather than buying an entire new turbo.
Full turbo replacement becomes necessary only when the turbine housing is cracked, the VGT mechanism is beyond repair, or the compressor housing has sustained damage from a catastrophic bearing failure.

What turbo does the 6.7 Cummins use?

The 6.7L Cummins uses Holset variable geometry turbochargers, with the specific model depending on the truck year.
The 2007.5 through 2012 Dodge Ram 2500 and 3500 with the 6.7L Cummins came equipped with the Holset HE351VE VGT turbocharger.
Starting in 2013, Ram switched to the Holset HE300VG turbo for the 6.7L Cummins, which uses a different speed sensor and VGT actuator calibration.
It is critical to verify your turbo model number before ordering rebuild parts, as the HE351VE and HE300VG use different components.
The Turbo Oil Feed Line Kit in this collection also covers 5.9L Cummins Holset HX35 and HX40 turbos from 2003 to 2007.

What is included in a 6.7 Cummins turbo rebuild kit?

A complete 6.7L Cummins turbo rebuild kit for the HE351VE includes replacement journal bearings, thrust bearing, oil seals, O-rings, and gaskets needed to restore the center hub rotating assembly.
Some rebuild kits also include a new compressor wheel and turbine shaft for a more comprehensive restoration, particularly when the original cast wheel shows signs of fatigue or imbalance.
Separate components are available individually, including VGT nozzle rings, speed sensors, and oil feed line kits for targeted repairs.
Always check the kit contents against your turbo model to confirm you are getting the correct parts for your specific HE351VE or HE300VG turbo.

What causes VGT nozzle ring failure on the 6.7 Cummins?

VGT nozzle ring failure on the 6.7L Cummins is primarily caused by carbon and soot accumulation that packs into the sliding vane mechanism over thousands of miles of operation.
The exhaust gases flowing through the turbo carry particulate matter that gradually builds up on the nozzle ring surfaces, eventually causing the vanes to stick in one position.
Trucks that idle extensively, run frequent short trips, or operate with degraded EGR systems are especially prone to accelerated carbon buildup in the VGT assembly.
A nitriding-treated replacement nozzle ring resists carbon adhesion better than the factory component and restores proper variable vane movement for consistent boost control.

Can you use these rebuild parts on a 5.9 Cummins turbo?

The Turbo Oil Feed Line Kit in this collection fits both 5.9L and 6.7L Cummins engines in Dodge Ram 2500 and 3500 trucks from 2003 through 2018.
If you are doing a 5.9 Cummins turbo rebuild on a 2003 to 2007 model with the Holset HX35 or HX40 turbo, the oil feed line is a direct fit replacement with T304 stainless construction and high-temperature Viton O-rings.
However, the compressor wheel, nozzle ring, and speed sensor components are specifically designed for the 6.7L HE351VE and HE300VG turbos and will not fit the 5.9L HX35 or HX40 turbochargers.
Always verify fitment by checking your turbo model number against the product compatibility list before ordering.

Do I need to calibrate the VGT actuator after a turbo rebuild?

On 2013 and newer 6.7L Cummins trucks equipped with the HE300VG turbo, VGT actuator calibration through the ECM is recommended after replacing or rebuilding the turbocharger.
The calibration procedure ensures the actuator position sensor accurately reports vane position back to the engine computer for proper boost control.
On the earlier 2007.5 through 2012 HE351VE turbos, the actuator is a self-contained electronic unit that generally does not require ECM calibration after a rebuild, though some owners choose to perform a relearn procedure anyway.
If you are replacing the speed sensor, clearing any stored trouble codes and performing a short test drive cycle will allow the ECM to relearn the new sensor values.

Are turbo rebuild kits legal for street-driven trucks?

Turbo rebuild kits and replacement components such as nozzle rings, compressor wheels, speed sensors, and oil feed lines are designed for competition and closed-course off-road use only.
Installing these parts on a vehicle driven on public roads may violate local, state, or federal emissions regulations depending on your jurisdiction.
It is the owner's responsibility to verify compliance with all applicable laws before purchasing or installing turbo rebuild components.
EGR Performance offers free shipping on all turbo rebuild parts, a 45-day return policy, and a one-year warranty for your peace of mind.
Contact our 24/7 live support team for fitment questions or technical guidance before placing your order.