LEARNING

1. Cylinder liners and piston ring
manufacturing
(CASTING)

3. • The cylinder liner is cast separately from the main
cylinder frame.
• The liner can be manufactured using a superior
material to the cylinder block.
• While the cylinder block is made from a grey cast iron,
the liner is manufactured from a nodular cast iron
alloyed with chromium, vanadium and molybdenum.
(cast iron contains graphite, a lubricant. The alloying
elements help resist corrosion and improve the wear
resistance at high temperatures.)
• The cylinder liner will wear with use, and therefore may
have to be replaced. The cylinder jacket lasts the life of
the engine.

4. PISTON RING

5. PISTON RING
• A piston ring is a split ring that fits into a
groove on the outer diameter of a piston in a
reciprocating engine such as an internal
combustion engine or steam engine.