Exam 9: Camshafts, Lifters, Timing Belts, and Chains

Technician A says sometimes the exhaust lobe on the camshaft will wear quickly and more severely than the intake. Technician B says the roller cam cuts valvetrain friction by 75%. Who is right?

What is meant by the term, valve overlap?

All of the following are timing components EXCEPT _____.

On a pushrod engine, all of the following are true except: ​

Technician ​A says that a camshaft thrust spacer that is too narrow can cause fluctuations in ignition timing. Technician B says that excessive timing chain slack can be verified on a pushrod engine with a distributor by turning the crankshaft by hand while watching to see if the distributor moves. Who is right?