Camshaft drive methods General statement check: “The camshaft is driven by the crankshaft via the timing belt.” Is this correct for typical belt-driven engines?

Introduction / Context:
The crankshaft-to-camshaft drive synchronizes valve events with piston motion. Various methods exist: timing belt, chain, or gears. Many gasoline engines (and some diesels) use a toothed timing belt to prevent slip.

Given Data / Assumptions:

• Question addresses the common belt-driven arrangement.
• Four-stroke engines require the cam to rotate at half crank speed.
• Toothed belts provide quiet, accurate drive when maintained.

Concept / Approach:
Where a timing belt is used, the camshaft pulley is driven directly by the crankshaft timing pulley through the belt. Idlers and tensioners set belt wrap and tension. Although some engines use chains or gears instead, the statement as applied to belt-driven layouts is correct.

Step-by-Step Solution:
Identify drive type: belt-driven.Observe pulleys: crankshaft timing pulley → belt → cam pulley(s).Conclusion: statement is correct for the intended configuration.

Verification / Alternative check:
Service manuals show timing marks on crank and cam pulleys and replacement intervals for the belt.

Why Other Options Are Wrong:
Limiting the truth to diesels or pushrod engines is incorrect; many OHV and OHC designs use belts.

Chain-driven engines use a chain, not a belt, but that does not invalidate the belt statement where belts are fitted.

Common Pitfalls:
Confusing accessory serpentine belts with the timing belt; misalignment or incorrect tension can cause jump timing and engine damage in interference engines.

Final Answer:
Correct