BorgWarner S360 Turbo Rebuild Service

PT Turbo rebuilds and remanufactures BorgWarner S360 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 Performance Diesel.

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Trouble Codes Often Seen on Performance Diesel Equipped with the BorgWarner S360

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

Also Known As

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

• BorgWarner S360 SX-E
• BorgWarner S360 SXE
• BW S360 performance diesel turbo
• S360 mid-frame turbo
• BorgWarner S300 series S360
• BorgWarner S360 single turbo

Vehicles We Commonly See With the BorgWarner S360

The S360 is a popular drop-in and upgrade choice across diesel performance builds, and we see it on a wide range of platforms.

Cummins Performance Builds

• 1989-2002 Dodge Ram 2500/3500 with the 5.9L 12-valve and 24-valve Cummins
• 2003-2007 Dodge Ram 5.9L common rail builds running a single S360 swap
• Sled pull and street/strip 5.9L and 6.7L Cummins setups

Power Stroke and Duramax Conversions

• 7.3L and 6.0L Power Stroke single-turbo conversions
• LB7/LLY Duramax builds using the S360 as a primary or atmosphere charger
• Compound setups where the S360 serves as the high-pressure unit

Off-Road and Equipment

• Diesel pulling tractors and competition trucks
• Mid-size diesel equipment retrofitted with the S360 for added airflow

Common BorgWarner S360 Failure Symptoms

• Excessive shaft play, both side-to-side and in-and-out, indicating worn journal or thrust bearings
• Whining or grinding from the center section under boost, usually pointing to bearing wear
• Oil pulling through the compressor and showing up as blue smoke under load
• Oil at the cold-side outlet and intercooler piping from a failing seal
• Loss of boost or slow spool from a wheel contacting the housing or from damaged blades
• Audible rubbing or contact noise during spool-up
• Visible compressor wheel tip damage or blade erosion when you inspect the inlet
• Boost that builds erratically or surges, often after aggressive tuning changes

Real BorgWarner S360 Failures We See in Our Shop

• Over-speed damage is by far the most common thing we pull apart on these. When the S360 gets pushed past its efficiency range with aggressive fueling and timing, the compressor wheel spins faster than it was ever meant to and we see cracked blade roots and wheels that have grenaded.
• Thrust bearing failures show up constantly on units that have been tuned hard. The S360 is a mid-frame turbo, and sustained high boost with rapid throttle changes loads the thrust bearing in both directions until it wears out and lets the rotating assembly walk.
• Compressor wheel contact is something we see when guys run the S360 undersized for the power level they are chasing. The wheel gets pushed against the housing under thrust load and you end up with rub marks, smeared blade tips, and lost efficiency.
• Bearing wear from sustained high boost is routine on high-mile race and pull units. The journal bearings glaze and wear, shaft play opens up, and that is usually what brings the turbo to us before a catastrophic failure happens.
• We also see oil seal failures that follow bearing wear. Once the shaft has play in it, the piston ring seals can’t hold, and oil starts migrating to the compressor or turbine side.

Preventing Future BorgWarner S360 Failures

Most of the early S360 failures we see come down to how the turbo is run, not how it was built.

• Match the turbo to your actual power level so you are not running it past its efficiency range and over-speeding the wheel
• Change oil on a tight interval with a quality diesel-rated oil, since the bearing system depends on clean, fresh oil
• Let the turbo idle and cool down after hard pulls or towing before shutting the engine off
• Allow a proper warm-up before getting into the boost on cold mornings
• Check the intake and boost piping for leaks regularly so the turbo isn’t working harder to make the same boost
• Keep a clean air filter and a sealed intake tract to protect the compressor wheel from debris
• Verify your tune isn’t commanding more boost or fuel than the S360 frame is comfortable supporting

Common BorgWarner S360 Upgrade Paths

Customers rebuilding an S360 frequently ask about upgrades that add durability for the power they are running. The most common requests are billet compressor wheels for better strength and airflow over the stock cast wheel, upgraded 360-degree thrust bearings to handle the heavy thrust loads that come with aggressive tuning, and improved journal bearings for high-boost reliability. Builders chasing higher power often ask about wheel and cover sizing changes within the S300 family, while towing-focused owners typically prioritize thrust and bearing upgrades for long-term reliability rather than peak airflow. We can talk through what makes sense for your specific build during the rebuild.

Frequently Asked Questions

How to Identify Your BorgWarner 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 BorgWarner 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 BorgWarner S360 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
• Wastegate inspection and actuator linkage service, when equipped
• CIMAT VSR balancing
• Final inspection

Why Customers Choose PT Turbo

• Rebuilding turbochargers, including BorgWarner, 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 BorgWarner Models

Turbo Models That Fit the BorgWarner S360

• BorgWarner S363 Turbo Rebuild Service