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.
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.
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.
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.
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.
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.
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.
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.
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.
| 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 |
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.
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.
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.
All compressor and turbine side seals, piston rings, and o-rings replaced on every rebuild.
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.
Every rebuilt CHRA is VSR balanced above OEM specification. This is not optional; every unit gets balanced before it goes back in a car.
Housings cleaned and inspected for damage. Everything assembled, torqued to spec, and shaft play verified within tolerance before packaging for return shipment.
Journal bearing set with thrust bearings and washers, or ball bearing cartridge replacement, whichever your unit requires. Upgrade pricing available at time of inspection.
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.
Dynamic high-speed balancing on every rebuilt CHRA. No exceptions.
Turbine shaft checked for runout and heat damage. Compressor wheel inspected for tip damage. Out-of-spec components quoted for replacement before proceeding.
Compressor and turbine housings cleaned, inspected for cracks and rub marks, and cleared before reassembly.
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.
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 |
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 Your Rebuild Request37833 Pineapple Ave Unit A • Dade City, FL 33523 • sales@theboostlab.com