When a standby generator turbo fails, the building loses its safety net. When a prime power turbo fails, the operation goes dark. Boost Lab, Inc. rebuilds the turbochargers on the engines that power hospitals, data centers, treatment plants, commercial buildings, and remote operations: Caterpillar 3400 and 3500 series, C-series industrial (C9, C13, C15, C18, C27, C32), Cummins QSK and QST genset power, Kohler, and MTU. Same-day intake, priority turnaround available, and our dealer program serves generator service companies with wholesale pricing. Nationwide ship-in service.
Generator turbos run at constant speed under load for hours or days, and they fail differently than anything mobile.
The 3406, 3408 and 3412 powered a generation of standby and prime gensets from 200 to 800 kW. Garrett and Schwitzer/BorgWarner turbos by rating: GT47 and GT55 on the larger 3412 configurations, S4D-class BorgWarner on the 3406B/E. These engines are legacy but still ubiquitous, and complete turbo assemblies through Cat channels are increasingly scarce and expensive.
The heavy industrial workhorse: 3508 V8 at 700 to 1,100 kW, the 3512 V12 covering the 1,000 to 1,750 kW data center and hospital segment, and the 3516 V16 up to 2,500 kW. Multiple turbos per engine, Garrett and Schwitzer/BorgWarner by vintage and rating. Cat 3516 turbo assemblies list over $8,000 each (Cat PN 210-4742 on record at that price). Rebuilding is the economic answer.
The modern Cat genset line: C9 with BorgWarner S310CG (13809880113), C13 and C15 running ACERT-family hardware, C18 with Garrett GT5518, C27 and C32 with larger Garrett and BorgWarner units. These are the Tier 4 Final successors to the 3400 series for new North American installations.
Cummins genset engines run Holset turbos across the range: QSK23, QSK45, QSK60 and QSK78 cover the 750 kW through 2,500 kW band with HX-series and HE-series Holset hardware. The same Holset families we rebuild for Cummins on-highway and marine, on the same bench.
Kohler generators run a mix of Kohler-branded engines (with Garrett and BorgWarner turbos) and Volvo Penta genset power. MTU/Rolls-Royce Power Systems generators run their own turbo configurations. Send tag photos through the repair form and we will identify any genset turbo.
A failed standby generator turbo at a hospital is a compliance emergency. A failed prime power turbo at a remote site stops everything. Dealer lead times for complete Cat 3500-series turbo assemblies can run weeks and cost five figures per unit. Rebuilding your core cuts both the time and the cost, and our priority turnaround serves the urgency these failures demand.
Standby gensets run monthly exercise cycles and then sit for months between events. Sitting hardens seals, and low-load exercise runs never bring the turbo to self-cleaning temperature, so carbon accumulates in the vane mechanism and exhaust housing. When the grid fails and the generator runs under real load for the first time in months, the turbo either performs or it does not, and finding out during a power outage is the wrong time. Scheduled turbo assessment during maintenance windows is the answer: we inspect, quote, and turn the unit while the grid is still up.
Verified Cat, Cummins and turbo manufacturer numbers for common genset applications. Search by any number.
| Turbo PN | Model | OEM PN | Application | Notes |
|---|---|---|---|---|
| Tag-specific by rating | Garrett GT47 / GT55 | Cat 3412 channel | Cat 3406E, 3412 gensets 200-800 kW | Rating-specific; verify serial prefix |
| Tag-specific by rating | BorgWarner S4D / Schwitzer 3LM | Cat 3406B/E channel | Cat 3406B, 3406E gensets | Legacy units; rebuild parts in production |
| 210-4742 | Cat 3516 turbo | Cat 3516 channel | Cat 3516 V16 gensets, 1,750-2,500 kW | Lists over $8,000 per unit through Cat |
| Tag-specific | Garrett / BorgWarner by vintage | Cat channel | Cat 3508, 3512 gensets | V8 and V12 configurations; multiple per engine |
| 13809880113 (BorgWarner) | S310CG | Cat 274-9989 | Cat C9 gensets | Same unit as C9 construction/truck |
| Tag-specific | Garrett GT5518 | Cat C18 channel | Cat C18 gensets 455-600 kW | Inline-6 Tier 4 genset standard |
| Tag-specific | Holset HE / HX by model | Cummins channel | Cummins QSK23/45/60/78 gensets | Same Holset families as on-highway power |
| Tag-specific | Garrett / BorgWarner | Kohler / MTU channel | Kohler and MTU gensets | Identify by turbo tag, not generator badge |
Constant-speed, variable-load, and long idle: genset failure patterns are their own world.
Standby generators sit for months between real events. Seals harden, and the first full-load run smokes. If exercise cycles never bring the unit to operating temperature, the problem compounds. Scheduled assessment during maintenance windows catches it before the outage does.
Exercise runs at 30% load never bring the turbo to self-cleaning temperature. Carbon accumulates in the turbine housing and on VGT vanes. Prime-rated generators that actually work avoid this entirely; standby units that only exercise are the vulnerable ones.
Genset oil change intervals are often set by hours, and many facilities stretch them. High-hour prime power units coke their center sections the same way any diesel does, and the next cold start starves the bearings. Clean oil at sensible intervals is the cheapest turbo protection.
Modern C-series Cat gensets with variable geometry turbos suffer the same carbon-stuck vanes as on-highway trucks, triggering derates during the load event the generator exists to cover. Mechanism cleaning restores most of these without a full assembly.
Generator sets transmit vibration through their skid and isolators differently than mobile equipment, and turbo bearing wear from vibration fatigue shows up on high-hour prime power units. VSR balancing on every rebuild ensures the turbo is not contributing its own vibration.
The worst genset turbo failures arrive during the events that matter most: hurricanes, grid failures, and facility emergencies. The turbo that was not assessed during the last PM cycle is the one that fails under load when the building needs it. Proactive assessment is the fix.
Rebuild the original. Cat 3500-series turbo assemblies are Garrett and BorgWarner hardware with strong rebuild support. A rebuild costs a fraction of a new assembly, and we prioritize genset work because the urgency is real.
Yes. Note the urgency and the facility type in your repair form submission. Generator turbo failures carry different stakes than a truck or a tractor, and we schedule accordingly.
Yes. Our dealer program covers wholesale pricing, priority turnaround, and core banking for generator service companies managing multiple sites. Email sales@theboostlab.com.
Yes, differently. Seals harden from sitting, carbon accumulates from low-load runs that never reach temperature, and the turbo is untested until a real outage demands full load. Scheduled turbo assessment during PM windows catches problems while the grid is still up.
Start at repair.theboostlab.com. Drain oil, cap openings, double-box with solid foam. Large 3500-series turbos should be banded to a small pallet. Ship to Boost Lab, Inc., 37833 Pineapple Ave, Unit A, Dade City, FL 33523.