You have likely heard of variable valve timing by one of the names manufacturers have for the system, such as VVT-i or VTEC.

The two-stroke gasoline engine was once a marvel of engineering, offering up huge doses of power in small and lightweight ...

With an updated chassis and a new air spring, Formula's new Selva V is a longer-travel single crown fork for all-mountain and ...

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace ...

Electro-pneumatic actuators play an essential role in various areas of the industry, including heavy-duty vehicles. This article deals with the control problem of an Automatic Manual Transmission, ...

Unlike piston engines, Rotary engines don’t require valves to run. Here’s how rotary engines work and why some designs have incorporated valves.

Porsche never made a four-valve head for an air-cooled 911. The 959 had 24 valves, but its heads were water-cooled. It wasn't until the first water-cooled 911, the 996, arrived in 1998 that the ...

A refrigeration or air conditioning system that is experiencing leaky valves or worn rings may be the most challenging troubleshooting scenario a technician will experience. That’s because a varying ...