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Which outcome occurs when high-speed diesel engine fuel injectors experience significant thermal soak back after shutdown?

A)Increased carbon deposit formation
B)Decreased peak cylinder pressure
C)Reduced exhaust gas temperature
D)Elevated lubricating oil viscosity

💡 Explanation

When diesel injectors experience thermal soak back, the heat retained in the engine after shutdown causes fuel within the injector to polymerize and degrade, leading to increased carbon deposits. Therefore carbon deposits is the result, rather than pressure decreases, temperature reductions or oil thickening which follow different failure modes.

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