Niles Nimmo

Diagnosing VGT Vanes Stuck Open or Closed is one of the most common jobs we handle at PT Turbo, and it trips up even experienced diesel techs because the symptoms overlap with fuel, sensor, and boost-control problems. A variable geometry turbo relies on a ring of movable vanes inside the turbine housing to change exhaust

Crankcase Pressure and Turbocharger Failure is one of the most misdiagnosed relationships in the diesel world, and it costs owners thousands of dollars in repeat turbo replacements every year. A mechanic swaps a leaking turbo, buttons everything back up, and three months later the new unit is blowing oil out the seals just like the

Understanding how a failed EGR kills your turbocharger starts with one simple fact: the two systems share the same exhaust stream, and when the EGR valve or cooler fails, everything downstream pays the price. At PT Turbo, we have been rebuilding turbochargers since 1978, and in over 45 years we have torn down thousands of

Turbo Oil Starvation is the single most destructive failure mode a turbocharger can face, and it kills more center housing rotating assemblies (CHRAs) than compressor surge, overspeed, and foreign object damage combined. A turbo bearing system relies on a continuous, pressurized film of clean oil to float the shaft on a cushion just microns thick.

Turbine Wheel Damage from Foreign Object Ingestion is one of the most common catastrophic failures we see come across the bench at PT Turbo, and it almost never happens because the turbo itself was defective. Something entered the exhaust stream, or worse, the intake stream, and slammed into a wheel spinning north of 100,000 RPM.

Compressor Wheel Damage is one of the most common reasons a turbocharger lands on our bench, and it is almost always a symptom of a bigger problem somewhere else in the engine. The wheel itself rarely fails on its own. Something got past the filter, the oil supply dried up, or the shaft started wobbling,

Turbocharger Bearing Failure is one of the most common reasons a perfectly good turbo ends up on a shop bench in pieces, and it almost never happens for no reason. The bearing system is the heart of the turbocharger, spinning the shaft at speeds north of 150,000 RPM while riding on a thin film of

Turbocharger Shaft Play is one of the first things any experienced diesel mechanic checks when a turbo starts making noise, smoking, or losing boost. That little bit of movement in the center shaft tells you more about the health of a turbocharger than almost any other quick test you can perform in the shop. The

Diesel Engine Low Power is one of the most common complaints that rolls into our shop, and the turbocharger is often blamed first, sometimes wrongly. After 45+ years of building and diagnosing turbos at PT Turbo, we can tell you that a weak-feeling engine can come from a dozen different places. The trick is knowing