Professional rebuild of the Mitsubishi TD06-17C turbocharger from the 4.3L LB4 turbo V6, restored to above-OEM specification with new bearings, VSR balancing, and complete photo documentation.
Every Syclone and Typhoon turbo is now over three decades old, and most have spent years running elevated boost on performance chips. If your truck is showing any of these signs, have the turbo inspected before wear reaches the wheels and housings.
The TD06-17C was sized for 14 psi from the factory, and almost every surviving truck has run harder than that. Age, elevated boost, and heat cycles concentrate wear in a few predictable places.
The factory thrust system takes the axial load, and elevated boost multiplies that load. Chipped trucks running past stock boost wear the thrust bearing first, which lets the compressor wheel walk into its housing.
The plain journal bearings depend on clean, pressurized oil. Decades of service and stretched oil change intervals produce shaft play, noise, and eventual wheel contact.
Original seal rings have aged past their service life on nearly every unrestored unit. Failed seals push oil into the intercooler plumbing and produce the classic blue startup smoke.
Repeated heat cycles crack and erode the turbine housing over time, especially on trucks that see hard use. Minor cracking can be addressed during rebuild before it grows into the flange.
Aged actuator diaphragms leak and no longer hold their setpoint, causing boost creep or low boost that gets misdiagnosed as a failing turbo. Actuators are inspected and function-tested on every rebuild.
Many of these trucks sit for months between drives. Moisture inside the housings pits shafts and bearing journals, and dried oil residue causes scoring the moment the turbo spools again.
Every Boost Lab rebuild is performed on your original turbocharger. We address every known TD06-17C failure point, and we build to match how your truck is actually driven, whether that is bone stock or chipped and pushing well past factory boost.
Complete teardown of the TD06-17C. Housings are inspected for cracks, erosion, and contact marks, and every finding is photo-documented before any work proceeds.
The center housing is stripped of carbon and varnish, and every oil and coolant passage is verified clear. This eliminates the starvation risk that kills freshly rebuilt turbos.
Journal bearings, the thrust system, and all seal rings are replaced with new components. This is the heart of the rebuild and resolves the root cause of most SyTy turbo failures.
Shaft journals are measured and reconditioned, and both wheels are inspected for damage. Replacement or upgrade options are quoted only with your approval first.
The rebuilt CHRA is VSR (Vibration Sorting Rig) dynamically balanced at actual operating shaft speeds and verified above OEM specification for absolute stability.
Housings are refit in their original clocked positions, the wastegate actuator is function-tested, and the unit is final-inspected and documented before shipping home.
Journal bearings, thrust system, and all seal rings replaced with new components on every rebuild.
Stock trucks get a faithful OEM-spec rebuild. Chipped trucks get a rotating assembly built for the thrust loads that elevated boost actually puts on this turbo.
Every feed and drain passage in the water-cooled center housing cleaned and flow-verified, eliminating the blockages that cause repeat failures on vintage turbos.
The CHRA is VSR balanced at operating shaft speeds and verified above OEM specification to ensure vibration-free operation at full boost.
Compressor and turbine housings inspected for cracks and contact marks and buffed to remove surface imperfections. Anything beyond buff-out is quoted before work continues.
Every stage of your rebuild is photographed and logged in our repair management system, giving you a permanent service record for the truck's history file.
Both trucks share the same Mitsubishi TD06-17C with 8cm² turbine housing: MHI part number 49179-04000, GM part number 15253, CHRA 49179-08940. The compressor runs a 48.3mm inducer and 68mm exducer, with a 12-blade 55.3mm / 65mm turbine.
| Model | Years | Engine | Turbo | Status |
|---|---|---|---|---|
| GMC Syclone | 1991 | 4.3L LB4 Turbo V6 | TD06-17C / 8cm² | Direct Fit |
| GMC Typhoon | 1992-1993 | 4.3L LB4 Turbo V6 | TD06-17C / 8cm² | Direct Fit |
| Aftermarket TD06 upgrades (20G and similar) | Any | 4.3L LB4 Turbo V6 | TD06H family | Send Photos First |
| GMC Sonoma GT | 1992 | 4.3L Vortec V6 | Not turbocharged | No Turbo Fitted |
Answers to the questions we hear most from Syclone and Typhoon owners and the shops that keep these trucks on the road.
Start your rebuild request at repair.theboostlab.com. Every job is fully documented in our repair management system: you will receive status updates, photos, and a complete record of your rebuild from intake through shipment.
Start Your Rebuild Request37833 Pineapple Ave Unit A • Dade City, FL 33523 • sales@theboostlab.com