Which risk increases when a turbocharger's wastegate actuator rod is improperly adjusted, resulting in excessive boost pressure?

💡 Explanation

When a wastegate actuator rod is improperly adjusted, excessive boost pressure occurs because the wastegate opens too late (or not at all), exceeding desired manifold pressure and increasing cylinder pressure, thus risking head gasket failure. Therefore head gasket failure is increased, rather than catalytic converter melting, injector clogging, or bearing wear which are linked to other parameters.

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