GM Powertrain announced today it will deliver a 3.6-liter V-6 gasoline engine with direct injection and variable valve timing (VVT) technologies in the 2008 model year. A vehicle application will be ...

Variable valve timing and variable valve lift may sound similar, but they're entirely different. Here are the differences between them and how they work.

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...

If you feel your Toyota VVTi engine low on power, one cause must be the combustion chamber’s tightness. And there are two things that can go wrong with it - loose valves or worn out piston rings. Here ...

The oil pan's role on a Toyota VVTi or any other engine is to collect the lubricating oil falling from its components to be absorbed back by the oil pump and recirculated. Due to its position at the ...

Harley-Davidson has filed a patent application for a variable valve timing (VVT) V-twin engine, possibly for the Sportster to improve economy and reduce emissions. The iconic American manufacturer has ...

Hello Paul, I drive a Toyota Wish with a VVTi engine. It has been running well until recently when it started reducing engine power or hesitating. A computer diagnosis reported it. Can the VVTi ...

Hello Francis, to resolve the VVTi problem, you may need to clean the oil sludge or deposit in the VVTi solenoid or replace it with a new one in case that one cannot be repaired. The VVT ...

Suzuki’s R&D department have filed a flurry of patent applications showing a variable valve timing system specifically aimed at the Hayabusa hyper bike – suggesting that even as the Busa hits its 25th ...

We haven't had any other reports of a failure of the VVTi hubs, but perhaps other readers might tell us of any failures they've had. The outcome you've managed to achieve is a reasonable one.