What are the possible reasons for the seizure of a piston?

Seizure due to overheating (mainly piston crown)

Overheating due to combustion defaults.
Bent/blocked oil injection jet.
Installation of incorrect pistons.
Malfunctions in the cooling system.
Clearance restriction in the upper sliding surface area.

What is seizure lubrication?

This is a typical example of seizure due to lack of lubrication. This damage is caused when the lubricating film breaks down on only one half of the cylinder. It is caused either by a lack of lubrication within a locally confined area or by the affected side of the cylinder overheating.

What causes cylinder wall damage?

Cylinder walls are lubricated as the rotating crankshaft picks up oil from the oil pan and flings it up on the cylinder walls. Carbon deposits around the valves may break off during combustion and cause damage to cylinder walls.

What causes a broken piston ring?

Cracks in the top of a piston (crown) in petrol engines are usually the result of excessive combustion pressure caused by excessive compression or over advanced ignition timing. In diesel engines this damage can be caused by a condition called thermal fatigue.

What is Micro seizure in liner?

Microseizure is caused when the liner and piston ring material is pressed together causing localised welding of the material in the absence of sufficient lube oil. The causes are insufficient oil and/or excessive cylinder pressures causes heavy ring/liner contact forces.

What is seized bearing?

Seizure of the bearings occurs when excessive heat exists during rotation. As a result of the excessive heat, many of the elements associated with the bearings begin to soften and melt, including the rolling elements, raceway rings, and the cage.

Which of the following is not a reason for piston failure?

Which of the following is not a reason for piston failure? Explanation: Piston scuffing occurs due to excessive heat the piston expands and becomes tight in the cylinder.

Is a scored cylinder bad?

TYPICAL COLLATERAL DAMAGE. Wear debris from the scored bores is very hard, and abrasive. As the cylinders lose ring seal, due to the bore scoring, harmful fuel contaminates the oil as it bypasses the piston rings. This fuel enters the engine oil, thus reducing oil viscosity as it intrudes into the oil.