What does a Dry cylinder liner mean?

• A. Dry liner does not come into contact with the coolant
• B. Dry liner is in direct contact with coolant
• C. Dry liner has a water jacket
• D. Dry liner is removable

Answer: (A)

A dry cylinder liner is a bore that does not come into contact with the coolant. In this design, the liner sits in the engine block with no water jacket around it, so heat from the combustion chamber is conducted into the surrounding block and cooled by the block’s external cooling passages rather than by coolant inside the liner. That’s why the correct description is that the liner does not contact the coolant. The other statements describe a wet liner with a water jacket and direct coolant contact, or imply removability, which isn’t the defining feature of a dry liner.