In a turbocharged diesel engine, which consequence results when extreme exhaust backpressure overwhelms the turbocharger's thrust bearing?

💡 Explanation

Compressor surge occurs due to excessive backpressure causing flow reversal, damaging the impeller; because the overwhelmed thrust bearing allows axial play, leading to impeller contact. Therefore, impeller damage results, rather than head temperature, which relates to combustion efficiency issues.

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