Niles Nimmo

If you run Freightliner Cascadias or any Detroit-powered truck, sooner or later the Detroit DD13 turbocharger is going to land on your bench. The DD13 uses a variable geometry turbo (VGT) that’s tied directly into the emissions system, and when it starts to fail, it rarely fails clean. You get derates, black smoke, boost faults,

If you’re running a Detroit Diesel Series 60 and your boost is lagging, your EGTs are climbing, or you’ve got oil pooling in the charge pipe, the turbocharger is usually the first suspect. The Series 60 is one of the most durable on-highway diesels ever built, but the factory Garrett units and their BorgWarner S300/S400

If you run a fleet of school buses, dump trucks, or medium duty rigs, you already know the Caterpillar 3126 turbocharger is the heart of one of the most widely deployed diesels of the late 1990s and 2000s. The 3126 and its 3126B/3126E variants powered everything from Blue Bird and Thomas school buses to Freightliner

The Caterpillar C18 turbocharger is one of the hardest-working forced induction units in the heavy equipment and standby power world. If you run C18-powered haul trucks, wheel loaders, marine gensets, or prime power generators, you already know this 18.1-liter inline-six builds its torque on boost pressure, and when the turbo goes soft, everything downstream suffers.

The Caterpillar C9 is one of the most versatile 8.8L inline-six diesels Cat ever built, powering everything from on-highway trucks and buses to excavators, wheel loaders, and stationary gensets. At the heart of its breathing system sits a BorgWarner S200 turbocharger, and when that unit starts smoking, hunting boost, or whining like a banshee, the

If you run a Caterpillar C7 in a medium-duty truck, bus, RV chassis, or piece of off-highway equipment, the turbocharger is the single component most likely to leave you stranded with a no-power complaint. The C7 turbo, whether the fixed-geometry unit on earlier ACERT builds or the variable-geometry (VGT) wastegated setup on later emissions-era engines,

If you run a Caterpillar C13, you already know this engine is a workhorse. Found in everything from on-highway trucks to wheel loaders and gensets, the C13 turbocharger is the single most important component standing between you and the boost numbers that move 80,000-pound loads. When that turbo starts to fail, fuel economy drops, EGTs

The Caterpillar C15 turbocharger is one of the hardest-working components in over-the-road trucking, and when it starts to fail it takes your boost, your fuel economy, and your uptime down with it. Whether you’re running an ACERT C15, a pre-emissions BXS/MBN block, or a 6NZ pulling 80,000 pounds over the Rockies, knowing how to diagnose