Which outcome primarily arises when excessive cylinder wall thermal deformation occurs from uneven piston expansion within an aluminum engine block?

💡 Explanation

Increased oil consumption and blow-by mainly occur because the increased bore **clearance** exceeds limits within the cylinder affecting ring sealing, therefore, gases and oil seep passed the pistons rather than complete smooth combustion; it is not detonation which is fuel.

• Which risk significantly increases when lean fuel mixtures occur in a two-stroke engine?
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• Which outcome occurs when a refrigerant leak leads to air infiltration in a refrigeration system's evaporator?
• Which risk increases when a hydraulic actuator's quick exhaust valve fails closed during rapid cycling?
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• Which risk increases when excessive humidity penetrates prestressed concrete bridge deck?