Does your engine need a valve adjustment? It depends on the age, condition and brand of vehicle you’re driving. Due to the popularization of roller-follower valve train designs that reduce friction ...

Modern engines contain hundreds – nay – likely thousands of different parts. There are valves and springs, at least one camshaft, engines also have bearing inserts, an oil pump, numerous gaskets, ...

Original engines in cars built before the early 1970s generally don't have hardened exhaust seats that are resistant to unleaded gas. Nevertheless, tests conducted in the mid-1970s by the U.S. Army, ...