Precision Turbo and 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. The Turbonetics product line now lives under the Precision umbrella at Wabtec, and we service that whole lineage too: see our Turbonetics reference.

Start a rebuild Call 813-443-0531
Next Gen
5558-8685 + Pro Mod / XPR
Gen 2
5558-7475 + XPR Pro Mod
Gen 1
5558-6766
Sport Series
4831-9402
Bearings
Journal + Ball Bearing
In shop since
2008, 17+ years

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. Turbos do not use rubber seals. They use metal piston rings that are gas control rings, not oil seals. Oil stays where it belongs through centrifugal force, oil deflectors, and pressure differential. When that pressure balance is upset, oil leaks. These are the conditions that upset it.

Restricted oil drain

The most common cause of PTE oil leaks we see, 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 and gets pushed past the piston rings at both ends. Minimum 3/4" internal diameter, continuous downhill slope, no sharp bends.

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.

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 life.

Hot soak and 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.

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.

Compressor wheel damage and 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.

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. Both are fully rebuildable.

Journal bearing and ball bearing turbo center sections compared 12345
  1. Floating journal bearings
  2. Oil film the bearings ride on
  3. Separate thrust bearing
  4. Ball bearing cartridge
  5. Ball races, which carry the thrust load as well

The two center sections we rebuild: journal bearing from $400, ball bearing from $550.

Attribute 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

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.

  1. Intake inspection and 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.

  2. 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.

  3. Full seal kit installation

    All compressor and turbine side seals, piston rings, and o-rings replaced on every rebuild.

  4. Shaft and 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.

  5. 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.

  6. Final assembly and inspection

    Housings cleaned and inspected for damage. Everything assembled, torqued to spec, and shaft play verified within tolerance before packaging for return shipment.

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.

Shaft and 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 and 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.

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. If your model is not listed here, contact us; chances are we have seen it.

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

Frequently asked questions

Can I upgrade from journal to ball bearing during a rebuild?

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.

Do I send the full turbo or just the CHRA?

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.

How do I ship a turbocharger safely?

Submit the rebuild form at repair.theboostlab.com first. Drain any residual oil from the oil inlet and outlet ports. Plug the ports with tape or foam to prevent contamination. Double-box the unit with foam or bubble wrap padding on all sides. Ship via UPS or FedEx to 37833 Pineapple Ave, Unit A, Dade City, FL 33523. We will send a confirmation.

What is the turnaround time?

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.

Can I just get a seal kit instead of a full rebuild?

In our experience, a turbo that only needs seals does not exist. 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. 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.

Do you work with tuner shops and race teams?

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.

Related service pages

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.

Start a rebuild Call 813-443-0531