🔍 Key Concepts

• Dry liner vs wet liner – where does cooling water actually touch, and what separates it from the combustion space? • Integral cylinder construction – the bore is machined directly in the block, with no separate sleeve forming the gas‑tight surface. • Look closely at the illustration around the cylinder wall for any separate liner outline, sealing rings, or direct water contact.

💭 Think About

• In the drawing, do you see a clearly defined, separate tube forming the cylinder bore, or is the bore simply the inside surface of the engine block casting? • Is there cooling water drawn right up against the back of a thin liner wall (with sealing rings at the top and bottom), or is the cooling jacket some distance away with solid metal between water and bore? • If the working surface is part of the main casting, ask yourself whether a sleeve could realistically be pressed out and replaced, or whether the whole block would have to be machined or renewed.

✅ Before You Answer

• Check the cylinder wall area in the illustration for a distinct liner piece versus a single solid casting. • Identify whether coolant passages contact the liner directly (wet) or are separated by metal (dry/integral). • Decide if the design shown would allow the sleeve to be removed and replaced without changing the main block casting.