In an overhead cam engine, what is the function of a timing belt or timing chain?

In an overhead cam engine, what is the function of a timing belt or timing chain?

• A. It lubricates the camshaft bearings.
• B. It synchronizes crankshaft and camshaft rotation to ensure proper valve timing relative to piston position.
• C. It seals the combustion chamber.
• D. It controls ignition timing via spark plug firing.

Answer: (B)