The rocker arm employs the use of a fulcrum or pivot to increase the cam lift by a given ratio. That increase in lift is the result of moving the pushrod pivot point closer to the fulcrum. That ...

The #3 cylinder exhaust valve pushrod broke due to a valve stuck in the closed position. No marks were seen on the top of the piston through a borescope. The lifter came apart as a result of the ...

In the valvetrain of your typical pushrod engine, the rocker arm is a critical component that also is an excellent tuning device. To properly tune with rocker arms, though, you need to understand how ...

Hidden mechanical risks: On some engines, a VVT solenoid trouble code may actually indicate rocker arm or camshaft wear, not just an electrical fault. Common failure signs: Symptoms include check ...