🔍 Key Concepts

• Study how the valves are installed in the cylinder head and what parts around the valve faces are separate pieces versus part of the casting. • Consider the difference between valve cages, valve seats, and cylinder liners in a four-stroke diesel engine cross‑section. • Look closely at the joint between the cylinder head and liner/block to see if any separate gasket or removable insert is drawn.

💭 Think About

• In the illustration, which component is clearly shown as a separate insert or ring at the point where the valve face contacts the cylinder head? • Do you see any full, removable assembly around the exhaust valve (a cage), or only small rings where the valve closes? • At the head-to-liner/block split line, is there a distinct gasket drawn, or does it appear to be a direct metal‑to‑metal fit with sealing elsewhere?

✅ Before You Answer

• Verify whether any valve cage is outlined as a large, removable unit surrounding a valve guide and seat. • Check if there is a clearly drawn gasket shape between the head and liner; if none is visible, eliminate that choice. • Identify if there are small, distinct seat inserts where the valves contact the head, indicating replaceable valve seats rather than integral seats.