How a Turbocharger Works

A turbocharger uses exhaust gas to spin a turbine that compresses intake air. It recovers waste energy, which is why virtually every modern diesel uses one. Holset turbochargers are standard on Cummins engines and many Weichai units.

How a Supercharger Differs

A supercharger is driven mechanically by the crankshaft, giving instant boost with no lag - at the cost of parasitic power. On diesel applications superchargers are rare; two-stage systems combine both.

Turbo Failure Signs

Blue smoke, oil in the intake piping, whining noise and loss of boost point to turbo trouble. A failing wastegate actuator or clogged oil feed line are the most common causes.

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Yes - see our Holset turbochargers page for HX40/HX50/HX55/HX60 units.

Yes, remanufactured turbos are available at a lower cost - see remanufactured engine parts.
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