Holset HE351CW Turbo: Common Problems, Symptoms and Rebuild Guide

PT Turbo rebuild prices: most turbos cost $450 to $975 to rebuild at our shop. See the turbo rebuild price list for yours.

The Holset HE351CW is the factory turbocharger on the 2004.5–2007 Dodge RAM 2500 and 3500 with the 5.9L Cummins ISB engine. After more than 20 years in service, these units are reaching high mileage, and their failure patterns are well-documented. PT Turbo rebuilds the HE351CW in-house (HE351CW rebuild service). Here is what you need to know.

What the HE351CW Does

The HE351CW is a fixed-geometry, wastegated turbocharger. A wastegate valve in the turbine housing opens to let part of the exhaust bypass the turbine once boost reaches its target, which keeps boost and shaft speed under control. On this turbo the wastegate actuator is fed boost pressure through a control solenoid that the engine computer commands. It has no moving vanes: the variable geometry version is the HE351VE fitted to the 6.7L Cummins from 2007.5, and the two share little beyond the name.

5 Common HE351CW Failure Modes

1. Sticking or Seized Wastegate
Soot and heat cycles can seize the wastegate valve or wear its linkage. A wastegate stuck open gives low boost, slow spool and often a P0299 underboost code; one stuck closed lets boost climb too high, which can set a P0234 overboost code. With the actuator disconnected, the wastegate lever should move freely by hand; the actuator itself is tested with regulated air pressure.
2. Wastegate Actuator or Control Solenoid Failure
The wastegate actuator is driven by boost pressure through an electronically controlled solenoid. A torn actuator diaphragm, a leaking boost reference line or a failed solenoid leaves the wastegate uncontrolled, and overboost or erratic boost is the usual result. The actuator and solenoid can be replaced without a full rebuild.
3. Shaft Play and Bearing Wear
With the engine cold and off, grab the turbo shaft and try to move it radially. A little radial play is normal on a journal-bearing turbo, because the bearings float on an oil film. Play large enough for a wheel to touch its housing, or any in-and-out play you can feel, indicates worn bearings. Left uncorrected, the compressor or turbine wheel will contact its housing and fail catastrophically.

4. Oil Starvation Damage
Most HE351CW failures trace back to degraded oil or a restricted oil feed line. The center section bearings are lubricated by pressurized engine oil. Inspect the feed line for kinks or carbon blockage every time you service the turbo.

5. Compressor Wheel FOD Damage
Foreign object damage occurs when debris—a stone, broken air filter material, or torn intake boot—is ingested through the compressor inlet. Even minor blade nicking disrupts aerodynamic balance and accelerates bearing wear. If blades are chipped or bent, rebuild or replacement is required.

DIY vs Professional Rebuild

Rebuild kits for the HE351CW are sold, but this is not a practical DIY repair. After replacing bearings and seals, the rotating assembly must be dynamically balanced on a VSR (Vibration Sorting Rig) machine. An unbalanced assembly can destroy new bearings quickly. PT Turbo performs VSR balancing on every rebuild before final assembly.

OEM vs Remanufactured HE351CW

The HE351CW is still listed new from Holset, as a remanufactured unit, and as a bare cartridge (CHRA) for a turbo whose housings are in good shape. Unbranded offshore copies are a gamble: there is usually no way to know whether the rotating assembly was balanced.

See the HE351CW turbos and cartridges PT Turbo lists, with current prices and stock. Visit our online store to order, or call (909) 824-1020 to speak with a technician. If your symptoms do not clearly fit the failure modes above, our team can help you diagnose over the phone. Contact us here.

Shop PT Turbo: Browse our Holset turbocharger catalog and our Cummins turbocharger catalog — OEM-spec replacements with a 12-month, unlimited-mile warranty. In-stock units available for same-day shipping.

Price ranges in this article are general estimates to help with budgeting, not PT Turbo quotes. Our current prices are on each product listing, and our rebuild prices are on the turbo rebuild price list.

Frequently Asked Questions

What years of Dodge Ram have the HE351CW turbo?

The 2004.5 to 2007 Dodge Ram 2500 and 3500 with the 5.9L Cummins. The Holset HE351CW is the factory turbocharger on those trucks, a fixed geometry, wastegated unit with no moving vanes.

Is the HE351CW a variable geometry turbo?

No. The HE351CW is a fixed geometry turbo that controls boost with a wastegate. The variable geometry version is the HE351VE, fitted to the 6.7L Cummins from 2007.5, and the two share little beyond the name.

Can an HE351CW be rebuilt at home with a kit?

Not practically. Rebuild kits are sold, but after the bearings and seals are replaced the rotating assembly must be dynamically balanced on a VSR (Vibration Sorting Rig) machine. An unbalanced assembly can destroy new bearings quickly.

Further Reading

• Cummins ISB 6.7 Turbocharger Problems: Diagnosis & Fix
• Holset HE431VE VGT Turbocharger: Problems & Rebuild
• Variable Geometry Turbocharger (VGT) Explained
• Turbocharger Shaft Play & Bearing Wear: What’s Normal?
• OEM vs Remanufactured Turbocharger: Which Is Better?

Further reading: Learn more about turbocharger technology.

A tired HE351CW is usually rebuildable. PT Turbo’s turbo rebuild service covers Holset VGT and wastegate units.