Valve gunk is nasty stuff that comes from the toxic vapor of steam, oil, gasoline and hydrocarbons circulating around the inside of your engine. A normal process of combustion in any gas powerplant, ...

Q: I have a 2009 VW with gasoline direct inject and a 2.0-liter turbo engine. It recently needed the intake valves cleaned (a very costly job) after just 54,000 miles. I understand many manufacturers ...

Times are a-changin’, folks. 2010 was twelve years ago, and a lot of the affordable used performance cars available today are more technologically advanced than ever. And none of those technologies ...

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 ...

So we wake up one day and decide we want to throw a supercharger on the C7, and while we are there let’s throw a cam in it, too! The supercharger is an air pump in front of the air pump and its ...

It has been touted as the automotive holy grail, the ultimate marriage of better performance and greater fuel economy. It’s the direct-injection (DI) engine, the latest technology designed to squeeze ...

Gasoline direct injection (GDI) continues to be a weapon in the technology armoury of automakers in their fight to reduce CO2. Manufacturers believe that homogeneous applications of GDI will be ...

Powertrain experts have been touting gasoline direct-injection engines for many years. As has been the case with automated cars and carbon-fiber construction, the passage of time hasn't brought this ...