Performance Turbocharger Rebuild

Precision Turbo
& Engine
Rebuild Service

Complete in-house rebuild service for all Precision Turbo series, Next Gen, Gen 2, Gen 1, Sport, and XPR Pro Mod. Journal and ball bearing configurations, complete in-house rebuilds with VSR high-speed balancing. Rebuilding PTE turbos since 2008, we turn jobs around faster than the factory.

Ship Your Turbo See Our Process →
2008 Rebuilding PTE Since
7+ Series Covered
In-House VSR Balancing
Next Gen
5558–8685 incl. Pro Mod & XPR
Gen 2
5558–7475 incl. XPR Pro Mod
Gen 1
5558–6766
Sport Series
4831–9402
Not Listed?
Contact us, chances are we have seen it
In Shop Since
2008 17+ years
Known Failure Points

Why Precision Turbos Fail

The vast majority of PTE turbos that come through our shop failed due to installation errors or external engine conditions, not a defective turbo. Understanding how the sealing system actually works is the first step to diagnosing the real problem. Turbos do not use rubber seals. They use metal piston rings seated in precision-machined grooves on the shaft. These rings are gas control rings, not oil seals. Their primary job is to keep boost pressure and exhaust gas out of the bearing housing, not to hold back oil under pressure. Oil stays where it belongs through a combination of centrifugal force, oil deflectors, and the pressure differential between the housings. When that pressure balance is upset, oil leaks. These are the conditions that upset it.

01
Restricted Oil Drain
The most common cause of PTE oil leaks we see in the shop, and it has nothing to do with the turbo itself. The oil drain from the CHRA relies entirely on gravity. If the drain line is undersized, kinked, runs at too shallow an angle, or returns into the pan below the oil level, oil backs up in the bearing housing, the housing fills, and oil gets pushed past the piston rings at both ends. Minimum 3/4" internal diameter, continuous downhill slope, no sharp bends.
02
Excessive Crankcase Pressure
The oil drain from the turbo connects to the crankcase. Under normal conditions crankcase pressure is slightly negative, helping oil drain freely. When crankcase pressure goes positive, from blow-by, a clogged PCV valve, or a restricted breather, it acts directly against the drain. Oil cannot exit the CHRA, backs up, and gets pushed past the piston rings. The turbo looks like it failed. The turbo did not fail. This is one of the most misdiagnosed conditions we encounter.
03
Oil Starvation at Startup
PTE journal bearing turbos require unrestricted oil flow from the moment the engine fires. A blocked feed line, wrong feed line sizing, failure to pre-oil on initial installation, or a restrictor that is too aggressive starves the bearings before oil pressure builds. Most installation-related bearing failures happen in the first minutes of the turbo's life. Ball bearing units require less flow but are not immune to starvation.
04
Hot Soak & Oil Coking
Shutting down immediately after hard driving traps heat in the CHRA with no active oil flow. Residual oil bakes into carbon deposits that restrict oil passages on the next startup, creating a starvation event before the engine builds pressure. This compounds over time. By the time the turbo comes to us it looks like a bearing failure. The root cause was operator habit combined with no turbo timer or cooldown procedure.
05
Bearing Wear from Contaminated Oil
Dirty, degraded, or wrong-viscosity oil destroys bearing surfaces. Journal bearings ride on a thin film of oil. Once that film breaks down from contamination or heat degradation, metal contacts metal. Ball bearing cartridges are less sensitive but not immune. Extended oil change intervals on a turbocharged car are a reliable path to a rebuild. When we tear these down the evidence is obvious under inspection.
06
Compressor Wheel Damage & Imbalance
Foreign object ingestion and compressor surge are the two main causes. Even a small nick on a compressor blade creates an imbalance that puts cyclic load on the bearings at 100,000+ RPM. The bearing wear that follows is rapid. This is also why VSR balancing on every rebuild matters: a rebuilt CHRA that is not balanced returns the problem in a different form.
Bearing Types

Journal vs. Ball Bearing

PTE turbos come in both journal bearing and ball bearing configurations. Journal bearings ride the shaft on a pressurized oil film and require higher oil flow with an unrestricted feed line. Ball bearing units use a ceramic cartridge and require less oil volume, but they generate more heat than journal bearings. Because of that, oil in a ball bearing turbo is primarily a coolant, not a lubricant. Journal bearings depend on oil to create the hydrodynamic film the shaft rides on, so lubrication is the primary role there. Both are fully rebuildable. The comparison table shows the key practical differences.

Journal Bearing
Ball Bearing
Spool response
Standard
Faster
Oil primary role
Lubrication
Cooling
Oil flow requirement
Higher, unrestricted
Lower
Oil starvation tolerance
Lower
Higher
CHRA heat generation
Lower
Higher
Rebuild cost
Lower
Higher
Our Rebuild Process

Every PTE
Done Right

We rebuild every Precision turbo the same way regardless of series or bearing type, full teardown, full inspection, all wear items replaced, and VSR balancing before it ships back. No shortcuts, no skipped steps.


We have been rebuilding PTE turbos since 2008 and turn them around faster than the factory. Everything including VSR balancing is done in-house at our Dade City shop. Nothing leaves our facility.

01
Intake Inspection & Documentation
Full teardown on arrival. Every component is photographed and inspected. We identify all failure points and contact you with findings before any parts are ordered.
02
Bearing Replacement
Journal bearings and thrust washers or ball bearing cartridge replaced with new units. In rare cases where a journal to ball bearing conversion is requested, the full bearing housing is replaced rather than modified.
03
Full Seal Kit Installation
All compressor and turbine side seals, piston rings, and o-rings replaced on every rebuild. Oil leaks do not come back from a Boost Lab rebuild.
04
Shaft & Wheel Inspection
Turbine shaft measured for runout and inspected for heat damage. Compressor wheel inspected for tip damage, erosion, and balance. Replacement quoted if either is out of spec.
05
VSR High-Speed Balancing
Every rebuilt CHRA is VSR balanced above OEM specification. This is not optional, every unit gets balanced before it goes back in a car.
06
Final Assembly & Inspection
Housings cleaned and inspected for damage. Everything assembled, torqued to spec, and shaft play verified within tolerance before packaging for return shipment.
What's Included

Standard Rebuild Includes

New Bearings
Journal bearing set with thrust bearings and washers, or ball bearing cartridge replacement, whichever your unit requires. Upgrade pricing available at time of inspection.
Complete Seal Kit
All compressor-side and turbine-side seals, piston rings, and o-rings replaced. Every seal in the turbo, not just the ones that visibly failed.
VSR Balancing
Dynamic high-speed balancing on every rebuilt CHRA. No exceptions. A turbo that is not balanced is not finished.
Shaft & Wheel Inspection
Turbine shaft checked for runout and heat damage. Compressor wheel inspected for tip damage. Out-of-spec components quoted for replacement before proceeding.
Housing Inspection & Clean
Compressor and turbine housings cleaned, inspected for cracks and rub marks, and cleared before reassembly.
Documented Build Record
Every job is tracked in our repair management system from intake through shipment. You receive status updates and a full record of what was done to your turbo.
Series Coverage

What We Rebuild

The numbers in each model name tell you the exact wheel sizing. The first two digits are the compressor inducer diameter in millimeters, the last two are the turbine exducer diameter. A 6266 is a 62mm compressor, 66mm turbine. A 7275 is a 72mm compressor, 75mm turbine. If you know your wheel sizes but not your model name, we can identify it.

If your model is not listed here, that does not mean we cannot help. Contact us with your model number and we will let you know what we can do.

Series Models Bearing Type Status
Next Gen 5558, 5862, 6266, 6466, 6870, 7275, 7480, 7675, 8685 Ball Full Support
Next Gen Pro Mod 8391, 8691, 8891 Ball Full Support
Next Gen XPR Pro Mod 8808, 9103, 9805, 9808 Ball Contact First
Gen 2 5558, 5562, 5862, 5866, 6062, 6066, 6266, 6466, 6870, 6875, 7475 Journal / Ball Full Support
Gen 2 XPR Pro Mod 8808, 9103, 9805, 9808 Ball Contact First
Gen 1 5558, 5562, 5858, 5862, 5866, 6262, 6266, 6766 Journal / Ball Full Support
Sport Series (Entry Level) 4831, 5431, 5831, 5931, 5976, 6176, 6776, 7275, 7675, 8284, 8802, 8884, 9402 Journal Full Support
Not Listed? Contact us with your model number. If PTE built it, we have likely seen it. Contact Us
Common Questions

Frequently Asked

In some cases, yes. A journal to ball bearing conversion requires replacing the entire bearing housing, not just swapping a cartridge. It is not something we do routinely. Contact us with your specific model number and we will let you know if it is viable for your unit and what it would cost.
Send the complete assembled turbo. We need to inspect the housings for rub marks, cracks, and erosion as part of every rebuild. Sending just the CHRA does not give us enough to work with and often results in a rebuilt center section going back into a damaged housing.
Drain any residual oil from the oil inlet and outlet ports before packaging. Plug the ports with tape or foam to prevent contamination during shipping. Double-box the unit with foam or bubble wrap padding on all sides. Ship via UPS or FedEx ground to 37833 Pineapple Ave Unit A, Dade City, FL 33523. Contact us before shipping and we will send a confirmation.
Standard turnaround is 7–14 business days from the day your turbo arrives. VSR balancing is included in that window. If additional parts are needed we will contact you before proceeding with an updated timeline and quote.
In our experience, a turbo that only needs seals does not exist. This is one of the most common misconceptions we run into. The piston rings in a turbocharger are gas control rings, not oil pressure seals. They do not fail on their own. When oil is leaking, it means the pressure balance in the system has been disrupted, and that disruption has almost always caused bearing wear at the same time. A turbo that has been leaking oil has been running in a compromised state. Replacing only the rings and putting it back in the car is not a repair. We inspect every unit that comes in and we have never pulled one apart that was in good enough condition to justify anything less than a full rebuild.
Yes. We have established trade relationships with performance shops, tuners, and race teams nationwide. If you are managing multiple turbo rebuilds regularly, contact us about dealer and wholesale pricing. We accommodate shop accounts with priority turnaround options.
Get Started

Ready to Rebuild?

Start your rebuild request in our repair system. Every job is fully documented from intake through return shipment, you will always know exactly where your turbo is in the process.

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sales@theboostlab.com theboostlab.com Dade City, FL