Performance Turbocharger Rebuild

Garrett
Turbocharger
Rebuild Service

Complete in-house rebuild service for all Garrett performance turbocharger series, G-Series, GTX Gen 2, GTX Gen 1, GT Series, T-Series, TA/TB/TV Series, and GBC. In-house VSR balancing on every unit since 2008.

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2008 Rebuilding Garrett Since
7 Series Covered
In-House VSR Balancing
G-Series (Gen I & II)
G25 G30 G35 G40 G42 G45 G47 G50 G55 G57
GTX Gen 2
GTX2860R through GTX5544R
GTX Gen 1
GTX2860R through GTX5533R
GT Series
GT15 through GT55
T-Series
T2 through T88
Not Listed?
Contact us, chances are we have seen it
Why Turbos Come In

What We See in the Shop

Garrett turbos are among the most robust units ever built. When they come in for a rebuild, the cause is almost always external, not a defect in the turbo itself. Understanding the actual failure mechanism matters because rebuilding a turbo without correcting the root cause means the next one fails the same way.

01
Oil Drain Restriction
The most common cause of Garrett oil leaks we see, and has nothing to do with the turbo. The drain relies entirely on gravity. An undersized drain line, a kinked return, a drain routed past 35 degrees off vertical, or a return point below the oil level in the pan all cause oil to back up in the CHRA. Once oil fills the bearing housing past the piston ring grooves, it exits through both ends. Minimum 5/8 inch internal diameter, continuous downhill slope, no loops or sharp bends.
02
Crankcase Pressure
The oil drain connects to the crankcase. When crankcase pressure goes positive, from blow-by, a clogged PCV valve, or a restricted breather, it pushes back against the gravity drain. Oil cannot exit the bearing housing, backs up, and gets pushed past the piston rings at both ends. The turbo looks like it failed. The turbo did not fail. Test crankcase pressure before condemning any Garrett turbo for oil leaks.
03
Oil Starvation at Installation
Failure to pre-oil the turbo before initial startup, a blocked or kinked feed line, or a feed line that was disturbed during installation can starve the bearings before oil pressure builds. Most installation-related bearing failures happen within the first minutes of run time. This is why pre-oiling and confirming feed line condition before startup is non-negotiable on any Garrett rebuild install.
04
Clogged Air Filter Creating Vacuum
A restricted air filter creates a partial vacuum at the compressor inlet. Under sufficient restriction, that vacuum can pull oil out of the bearing housing past the compressor-side piston rings and into the intake tract. The result looks like a compressor-side seal failure. Replacing the turbo without replacing the air filter and checking for intake restriction puts the next unit through the same failure.
05
Hot Soak and Oil Coking
Shutting down immediately after sustained high-load operation traps heat in the CHRA with no active oil flow. Residual oil bakes into carbon deposits that progressively restrict oil passages. Over time this compounds into a partial starvation condition on every cold startup. When we tear down a Garrett that has been running a long time and is now leaking, coking in the CHRA is one of the most common things we find.
06
Bearing Wear from Degraded Oil
Extended oil change intervals on a turbocharged vehicle accelerate bearing wear significantly. Garrett journal bearings ride on a hydrodynamic oil film. Once that film breaks down from heat, contamination, or viscosity loss, metal contacts metal. Ball bearing GTX units are less sensitive but not immune. The evidence is always visible on teardown. We document it with photos on every job.
Our Rebuild Process

Every Garrett
Done Right

We have been rebuilding Garrett turbos since 2008 across every series from small T-Series units to large G-Series singles. Every rebuild follows the same process regardless of series or size. Everything including VSR balancing is done in-house at our Dade City shop. Nothing leaves our facility.


Every job is tracked in our repair management system from the moment it arrives through the day it ships back. You always know where your turbo is in the process.

01
Intake Inspection and Documentation
Full teardown on arrival. Every component inspected and photographed. We identify all failure points and confirm root cause before any parts are ordered or work begins.
02
Bearing Replacement
Journal bearings, thrust bearings, and thrust washers replaced on journal bearing units. Ball bearing cartridge replaced on GTX and G-Series ball bearing units. New components on every rebuild, no exceptions.
03
Piston Ring and Seal Hardware Replacement
All compressor and turbine side piston rings replaced. Seal plates, o-rings, and related hardware inspected and replaced as needed.
04
Shaft and Wheel Inspection
Turbine shaft checked for runout and heat damage. Compressor wheel inspected for tip damage, erosion, and balance. Replacement quoted if either is out of spec.
05
In-House VSR Balancing
Every rebuilt CHRA is VSR balanced in-house above OEM specification. We do not send balancing out. It is done here before the turbo goes back together.
06
Final Assembly and Inspection
Housings cleaned and inspected for damage. Turbo assembled, shaft play verified within tolerance, and photographed before packaging for return shipment.
What's Included

Standard Rebuild Includes

New Bearings
Journal bearing set with thrust bearings and washers for journal units. Ball bearing cartridge replacement for GTX and G-Series ball bearing units.
Piston Ring and Seal Hardware
All compressor and turbine side piston rings replaced on every rebuild along with seal plates and o-rings.
In-House VSR Balancing
Dynamic high-speed balancing performed in-house on every rebuilt CHRA before final assembly. Not sent out, done here.
Shaft and Wheel Inspection
Turbine shaft checked for runout and heat damage. Compressor wheel inspected for tip damage and erosion. Out-of-spec components quoted for replacement before proceeding.
Housing Inspection and Clean
Compressor and turbine housings cleaned, inspected for cracks, erosion, and rub marks before reassembly.
Documented Build Record
Every job tracked in our repair system from intake through return shipment. Photos documented at teardown and at completion.
Series Coverage

What We Rebuild

The model number on a Garrett turbo encodes its compressor frame size and trim level. The part number stamped on the CHRA or turbine housing is the most reliable way to confirm your exact unit if the model designation is not visible. If your model is not listed here, that does not mean we cannot help. Contact us with your model or part number and we will confirm what we can do.

G-Series Gen I
Ball Bearing
Models G25-550, G25-660, G25-700, G30-660, G30-700, G30-770, G30-825, G30-900, G35-900, G35-990, G35-1050, G40-900, G40-1150, G42-1200, G42-1450, G45-1125, G45-1350, G45-1475, G45-1500, G45-1600, G47-1550, G47-1650, G47-1850, G50-1700, G50-1900, G55-1850, G55-1950, G55-2100, G55-2250, G55-2450, G55-2650, G55-2900, G57-1950, G57-2000, G57-2250, G57-2350, G57-2425, G57-2550, G57-2750, G57-3000 Common Part Numbers 877895-XXXXS (G25), 880698-XXXXS (G30), 880701-XXXXS (G35), 871390-XXXXS (G25/G30 reverse), 879779-XXXXS (G42), 856816-XXXXS (G45), 856820-XXXXS (G47), 856824-XXXXS (G50), 856828-XXXXS (G55), 856832-XXXXS (G57)
G-Series Gen II
Ball Bearing
Models G25-585, G25-700, G30-725, G30-900, G35-990, G35-1050, G40-1150, G42-1200, G42-1450 Common Part Numbers 934076-XXXXS (G25/G30), 934115-XXXXS (G25/G30 reverse), 934123-XXXXS (G35), 934126-XXXXS (G35 Super Core), 934128-XXXXS (G40), 934130-XXXXS (G42)
GTX Gen 2
Ball Bearing
Models GTX2860R, GTX2867R, GTX3071R, GTX3076R, GTX3576R, GTX3582R, GTX3584RS, GTX4202R, GTX4294R, GTX4508R, GTX4709R, GTX4720R, GTX5009R, GTX5020R, GTX5533R, GTX5544R Common Part Numbers 836023-XXXXS (GTX2860R/GTX2867R), 836026-XXXXS (GTX3071R/GTX3076R), 849894-XXXXS (GTX3576R/GTX3582R), 846098-XXXXS (GTX3584RS), 856801-XXXXS (GTX3076R/GTX3582R assembly kits), 851154-XXXXS (Super Core GTX3076R/GTX3582R), 853248-XXXXS (GTX4202R/GTX4294R), 854800-XXXXS (GTX5009R/GTX5020R), 854802-XXXXS (GTX5533R/GTX5544R)
GTX Gen 1
Ball Bearing
Models GTX2860R, GTX2867R, GTX3071R, GTX3076R, GTX3582R, GTX4202R, GTX4294R, GTX5533R Common Part Numbers 700177-XXXXS (GTX2860R/GTX2867R), 700382-XXXXS (GTX3071R/GTX3076R), 706451-XXXXS (GTX3582R), 743347-XXXXS (GTX4202R), 750162-XXXXS (GTX4294R/GTX5533R)
GT Series
Journal Bearing
Models GT15, GT17, GT20, GT22, GT25, GT25R, GT28, GT28R, GT30, GT30R, GT35, GT35R, GT37, GT37R, GT40, GT40R, GT42, GT42R, GT45, GT45R, GT47, GT47R, GT50, GT55 Common Part Numbers 452187-XXXXS (GT25/GT28), 466541-XXXXS (GT28R/GT30R), 479594-XXXXS (GT30R), 753392-XXXXS (GT35R), 743347-XXXXS (GT37/GT40), 436485-XXXXS (GT42/GT45), 471171-XXXXS (GT47/GT50)
T-Series
Journal Bearing
Models T2, T25, T28, T3, T3/T4, T04B, T04E, T04R, T04S, T04Z, T06, T12, T14, T18, T18A, T25, T25R, T28, T30, T31, T34, T35, T38, T40, T51R, T60, T61, T62, T66, T67, T70, T72, T76, T78, T88 Note on Part Numbers T-Series part numbers vary significantly by application and housing configuration. Contact us with any markings visible on your CHRA nameplate and we can identify the unit. You can also reference our Garrett part number reference for T-Series lookups.
TA / TB / TV Series
Journal Bearing
Models TA25, TA31, TA34, TA45, TA51, TB02, TB03, TB25, TB28, TB31, TMF55, TP38, TV60, TV61, TV71, TV75, TV81
GBC Series
Journal Bearing
Models GBC28, GBC30, GBC35, GBC37, GBC40, GBC42

Don't see your model? That does not mean we cannot rebuild it. Garrett has produced hundreds of turbocharger part numbers across OE and performance applications. Contact us with your model name or the part number from the CHRA nameplate and we will let you know what we can do. You can also reference our Garrett part number reference to look up your unit.

Common Questions

Frequently Asked

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, the pressure balance in the system has been disrupted, and that disruption has almost always caused bearing wear at the same time. We have never pulled a turbo apart that was in good enough condition to justify anything less than a full rebuild.
The part number is stamped or engraved on the nameplate on the center housing (CHRA). On older T-Series and GT-Series units it may be on a separate plate riveted to the housing. A standard Garrett performance part number is six digits, a dash, then four digits followed by S, for example 856801-5001S. OE replacement numbers follow a similar format. If the nameplate is damaged or unreadable, contact us with any visible markings and a photo and we can help identify the unit.
Drain any residual oil from the inlet and outlet ports before packaging. Plug the ports with tape or foam to prevent contamination during transit. 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. Contact us before shipping and we will send a receiving confirmation.
Standard turnaround is 7 to 14 business days from the day your turbo arrives. All work including VSR balancing is done in-house so there are no delays waiting on outside vendors. If additional components such as a replacement shaft or compressor wheel are needed, we will contact you before proceeding with an updated timeline and quote.
Before assuming the turbo itself is the problem, verify the drain line size and routing, check for crankcase pressure, inspect the air filter for restriction, and confirm the feed line is unrestricted and correctly positioned. The majority of Garrett oil leak complaints we see come from one of those four external causes. If you have confirmed all of those are correct and the turbo is still leaking, contact us and we can help diagnose next steps.
Yes. We have trade relationships with performance shops, dealers, and tuners nationwide. If you are managing multiple turbo rebuilds regularly, contact us about wholesale pricing and shop accounts.
Get Started

Ready to Rebuild?

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

Start Your Rebuild Request
sales@theboostlab.com theboostlab.com Dade City, FL

Garrett part numbers serviced by Boost Lab, Inc.:
836023-5001S, 836023-5002S, 836023-5003S, 836023-5004S, 836023-5005S, 836026-5001S, 836026-5002S, 836026-5003S, 836026-5004S, 836026-5005S, 849894-5001S, 849894-5002S, 849894-5003S, 849894-5004S, 846098-5001S, 846098-5002S, 851154-5001S, 851154-5002S, 851154-5003S, 851154-5004S, 856801-5001S, 856801-5002S, 856801-5003S, 856801-5004S, 856801-5005S, 856801-5006S, 856801-5007S, 856801-5008S, 856801-5009S, 856801-5010S, 856801-5026S, 856801-5027S, 856801-5068S, 853248-5001S, 853248-5002S, 853248-5003S, 853248-5004S, 854800-5001S, 854800-5002S, 854802-5001S, 854802-5002S, 700177-5001S, 700177-5002S, 700177-5003S, 700177-5004S, 700177-5014S, 700177-5022S, 700177-5023S, 700382-5001S, 700382-5002S, 700382-5003S, 700382-5004S, 700382-5012S, 700382-5020S, 706451-0034, 706451-5001S, 706451-5002S, 743347-5001S, 743347-5002S, 750162-5001S, 750162-5002S, 452187-5001S, 452187-5002S, 452187-5003S, 466541-5001S, 466541-5002S, 466541-5003S, 479594-5001S, 479594-5002S, 753392-5001S, 753392-5002S, 753392-5003S, 436485-5001S, 436485-5002S, 471171-5001S, 471171-5002S, 877895-5001S, 877895-5002S, 877895-5003S, 877895-5004S, 877895-5005S, 877895-5006S, 877895-5007S, 877895-5008S, 877895-5013S, 880698-5001S, 880698-5002S, 880698-5003S, 880698-5004S, 880698-5005S, 880698-5006S, 880698-5007S, 880698-5013S, 880701-5001S, 880701-5002S, 880701-5003S, 880701-5004S, 880701-5005S, 880701-5006S, 880701-5007S, 880701-5008S, 871390-5001S, 871390-5002S, 871390-5003S, 871390-5004S, 871390-5005S, 871390-5011S, 879779-5001S, 879779-5002S, 879779-5003S, 879779-5004S, 879779-5005S, 879779-5006S, 879779-5007S, 879779-5014S, 934076-5001S, 934076-5002S, 934076-5003S, 934076-5004S, 934076-5005S, 934076-5006S, 934115-5001S, 934115-5002S, 934115-5003S, 934115-5004S, 934123-5001S, 934126-5001S