ASE T1 Gasoline Engines (Medium Heavy Truck) Practice Questions - ASE T1 - Gasoline Engines (Medium Heavy Truck) Certification Exam

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A truck gasoline engine has a steady knocking noise that increases with load and is loudest at idle when warm. Disabling the suspected cylinder's ignition reduces the noise. This MOST likely indicates:

A worn connecting rod bearing in that cylinder A loose accessory drive belt A leaking exhaust manifold gasket A normal fuel injector tick

Correct Answer:

A worn connecting rod bearing in that cylinder

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