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

As for when you should replace your PCV valve, about every 30,000 miles is the recommended interval for the valve installed in the Ford. That can translate to roughly ever 4-5 years depending on ...

Variable valve tech and what it does in your car When you check out the features of a new car, you'll probably be bombarded with glowing words about its engine's "advanced valvetrain technology." ...

PCV valve | Cars.com illustration by Erin Williamson. Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not.

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 ...

Cleaning the idle air control valve (IACV) on your vehicle periodically helps keep carbon and other particles from building up on the valve, which can negatively affect the operation of the car ...

Camcon Auto's Intelligent Valve Technology just changed the rules for what an internal combustion engine can do.

Dear Tom and Ray: I have a 1998 Honda CR-V with about 189,000 miles on it. A month or two ago, the check-engine light came on, and a scan said I had two bad oxygen sensors. I had them changed.

The tank-car owners have 60 days to replace the valves. Within 90 days, they also must also replace 37,000 1-inch and 2-inch valves manufactured by the same company.