Holset HE300VG Turbo Rebuild Service

PT Turbo rebuilds and remanufactures Holset HE300VG turbochargers in-house at our San Bernardino, CA shop. Every unit goes through a full teardown, OEM-spec or better parts replacement, CIMAT VSR balancing, and final quality inspection before it ships back — backed by a 12-month unlimited mileage warranty and nationwide mail-in service. Commonly found on 6.7L Cummins.

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Common Holset HE300VG Part Numbers

The following part and SKU numbers from PT Turbo’s catalog match or cross-reference to the Holset HE300VG:

Don’t see your number? Contact PT Turbo — we’ve been matching turbo part numbers since 1978.

Trouble Codes Often Seen on 6.7L Cummins Equipped with the Holset HE300VG

These are generic diagnostic trouble codes commonly associated with turbo boost control issues on this application. They’re triggered by the vehicle’s ECU, not the turbo itself, so confirm with a scan tool before assuming the turbocharger is at fault.

• P0299 — Turbocharger/Supercharger Boost Pressure – Low (underboost)
• P0234 — Turbocharger/Supercharger Overboost Condition
• P003A — Turbocharger Boost Control Position Sensor Circuit Low
• P2563 — Turbocharger Boost Control Position Sensor

Also Known As

Buyers searching for this turbo often use a handful of different names for the same unit.

• Holset HE300VG VGT
• Holset HE300VG variable geometry turbo
• Cummins 6.7L HE300VG
• Holset 6.7 Cummins VGT turbo
• HE300VG electronic actuator turbo
• Holset HE300 VGT

Vehicles We Commonly See With the Holset HE300VG

The HE300VG shows up almost exclusively on the 6.7L Cummins, but across a few different platforms and uses.

Ram / Dodge Pickup Trucks

• Ram 2500 and 3500 with the 6.7L Cummins (later production years)
• Dodge Ram 4500 and 5500 chassis cab trucks
• Trucks running the HE300VG in place of or alongside the older HE351VE

Cab & Chassis / Commercial Use

• Cab chassis 6.7L Cummins units used for flatbeds and service bodies
• Box trucks and utility vehicles built on Cummins 6.7L drivetrains

High-Mileage Tow & Work Trucks

• Fleet and work trucks with heavy idle and stop-and-go duty cycles
• Trucks pulling fifth-wheel and gooseneck trailers regularly
• Diesel pickups with frequent short-trip city driving where soot accumulates fast

Common Holset HE300VG Failure Symptoms

• Check engine light with VGT or turbo actuator related codes (often P132A, P003A, P2563)
• Truck dropping into limp mode with reduced power and no boost
• Sluggish throttle response and slow spool, especially under load or while towing
• Overboost or underboost faults caused by inaccurate vane position reporting
• Audible whistling, fluttering, or actuator chatter at idle and during transitions
• Black smoke under acceleration from poor exhaust flow control
• Shaft play or grinding noise indicating worn bearings
• Oil in the charge piping or visible oil leaks from the center housing

Real Holset HE300VG Failures We See in Our Shop

• On the Holset HE300VG units we rebuild, the number one issue is soot and carbon packing into the variable geometry section. The vanes and unison ring stick, the turbo can’t move freely, and the truck either flares boost or won’t build it at all.
• We frequently see failed electronic actuators that throw the truck into limp mode. The internal motor or gearing gives out, the actuator stops commanding the vanes correctly, and the dash lights up with actuator and turbo position codes.
• Vane position sensor drift is another one we catch on the bench. The sensor slowly reports the wrong position over time, so the ECM thinks the vanes are somewhere they aren’t, which triggers overboost and underboost faults that owners chase for weeks.
• We pull plenty of HE300VG cores where the carbon buildup has scored the unison ring and worn the vane pivots, so even after cleaning, the geometry won’t hold tolerance and the parts have to be replaced.
• On higher-mileage units we find bearing and shaft wear that develops once the VGT is already binding, because the turbo is being forced to work against stuck vanes and surge.
• We also see units come in after a cheap actuator-only swap that never fixed the root problem, because the real failure was carbon-locked vanes underneath, not just the actuator.

Preventing Future Holset HE300VG Failures

Most HE300VG failures trace back to soot management and oil quality, both of which you can stay ahead of.

• Stick to the factory oil change interval or shorter, using proper diesel-rated oil, since dirty oil accelerates bearing and actuator wear.
• Let the truck idle for a short cooldown after hard towing so the center housing doesn’t coke the oil.
• Allow proper warm-up before heavy load so the VGT mechanism isn’t moving cold and gummed.
• Avoid constant short trips where the engine never gets hot enough to burn off soot in the VGT section.
• Get the truck up to temperature and run it under load periodically to help keep the vanes and unison ring exercised and clean.
• Check for boost leaks at the charge pipes and clamps so the turbo isn’t overworking to make target pressure.
• Keep a clean air filter and verify the EGR and intake side aren’t dumping excess soot toward the turbine housing.

Common Holset HE300VG Upgrade Paths

Customers rebuilding the HE300VG often ask what can be improved while the unit is apart. The most common questions are about upgraded compressor and turbine wheels for owners wanting more airflow, billet compressor wheels for added strength on tuned trucks, and heavier-duty thrust bearing components for trucks that tow hard or spend a lot of time at high drive pressure. Some buyers also ask about improved actuator and sensor components to address the electronic and position-drift failures that plague these units. These are informational options, and the right path depends on whether the goal is added performance or simply maximizing reliability for towing and high-mileage work.

Frequently Asked Questions

How to Identify Your Holset Turbo

The identification tag is typically located on the compressor housing, bearing housing, or center section of the turbocharger. It usually lists the model number, assembly number, and serial number. If you’re not sure which Holset model you have, send PT Turbo a photo of the tag and we’ll help identify it before you ship anything.

PT Turbo Warranty

• 12-month, unlimited mileage warranty against defects in parts and workmanship
• Final quality inspection on every rebuild: leak test, visual inspection, actuator or wastegate function check
• In-house CIMAT VSR balancing with a balance report included
• Nationwide mail-in service — you don’t need to be local

What the Holset HE300VG Rebuild May Include

• Complete teardown of all major components
• Ultrasonic or parts cleaning to remove carbon, oil residue, and contamination
• Journal bearing, thrust bearing, and seal replacement
• O-rings and hardware replacement
• Shaft and wheel inspection, with compressor or turbine wheel replacement if needed
• VGT vane mechanism and actuator cleaning, inspection, or repair
• CIMAT VSR balancing
• Final inspection

Why Customers Choose PT Turbo

• Rebuilding turbochargers, including Holset, since 1978
• In-house CIMAT VSR balancing on every unit, not outsourced
• Full housing sandblasting and OEM-spec or better parts replacement
• Inspect first, quote before work begins — no surprise charges
• Nationwide mail-in service from our San Bernardino, CA shop

PT Turbo Inspection Process

Every turbocharger goes through the same evaluation before any work begins:

1. Initial evaluationcompressor wheel, turbine wheel, shaft, bearing housing, VGT assembly (if equipped), actuator, and seal surfaces are checked first.
2. Complete disassemblythe turbocharger is fully torn down and every major component is inspected individually.
3. Cleaningcomponents are cleaned to remove carbon, oil residue, rust, and contamination.
4. Measurementcritical tolerances are measured against OEM specification.
5. Reassemblyrebuilt using new wear components matched to your specific model.
6. CIMAT VSR balancingthe rotating assembly is balanced in-house, with a balance report included.
7. Final inspectionleak test, visual inspection, and actuator or wastegate function check before shipment.

No work begins without your approval. You receive a quote after inspection, not before.

Pricing

Most rebuilds require inspection before final pricing. Standard rebuild pricing depends on the turbo model, parts availability, wheel condition, shaft condition, housing damage, and whether upgrades are requested. PT Turbo inspects every turbo and sends a quote before any work begins — no surprise charges.

Related Holset Models

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