🔍 Key Concepts

• Distinguish pushrod operated overhead valve (OHV) systems from overhead cam (OHC) systems by looking for the camshaft location and presence of long pushrods and rocker arms. • Determine whether the cylinder uses wet liners (liner directly in contact with coolant and clearly separate from the block) or jacketed/dry liners (coolant flows in passages in the block, not directly against the liner). • Note how the cylinder wall, liner, and water space are drawn in the cross‑section of the illustration.

💭 Think About

• In the illustration, where is the camshaft located—up in the cylinder head near the valves, or low in the block driving long rods up to rocker arms? • Do you see a distinct, removable liner with coolant drawn directly against its outside surface, or do you see coolant passages cast around a more solid cylinder wall? • How do the visible pushrods/rocker arms or lack of them help you decide between an overhead camshaft and a pushrod‑type overhead valve arrangement?

✅ Before You Answer

• Before choosing, be sure you can trace the valve motion path from the camshaft to the valves in the drawing. • Confirm whether the coolant contact surface is the outside of a thin, separate liner (wet) or a surrounding block jacket (jacketed/dry). • Eliminate any options where either the valve gear type or the liner type clearly disagrees with what you can actually see in the cross‑section.