Page 79 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Causes of cylinder bore wear
• Piston Side Thrust
• Applying continuous pressure on the cylinder liner through the piston ring.

• Cylinder overheating
• Lack of lubricating oil
Frequent abnormal wear in a cylinder block component can occur due to various reasons
1 Poor Lubrication: Inadequate lubrication or poor quality lubricants can lead to increased friction between
moving parts, causing accelerated wear.
2 Contaminants: Dirt, debris, or metal particles in the lubricating oil can cause abrasive wear on the cylinder
block surfaces.

3 Incorrect Installation: Improper installation techniques or incorrect assembly procedures can result in uneven
stress distribution and premature wear.
4 Overheating: Excessive engine temperatures can cause thermal expansion, leading to distortion and
accelerated wear in the cylinder block.
5 Material Defects: Manufacturing defects or substandard materials in the cylinder block can result in premature
wear and failure.
6 Poor Maintenance: Neglecting regular maintenance, such as oil changes and engine inspections, can allow
wear to progress unchecked.

7 Combustion Issues: Irregular combustion, such as detonation or pre-ignition, can cause increased stress on
the cylinder block components, leading to abnormal wear.
8 Operating Conditions: Continuous operation under extreme loads or harsh environmental conditions can
accelerate wear on cylinder block components.
Addressing these issues through proper maintenance, quality lubrication, and monitoring operating conditions
can help mitigate abnormal wear in cylinder block components.

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CITS : Automotive - Mechanic Diesel - Lesson 15 - 18