1.6l Cd Turbocharged Front Wheel Drive Power Steering 4-wheel Disc Brakes A/c on 2040-cars

Auto blog

Nissan recalling 104k Juke models over faulty timing chain [UPDATE]

General Motors isn't the only manufacturer that gets to issue a recall today, as Nissan is set to announce a voluntary recall of the 2011 to 2013 Juke due to a fault with the timing chain. 104,439 units are affected by this recall. The timing chain in some Jukes could deteriorate over time, leading to a warning light in the instrument cluster. In extreme cases, the chain could snap.
Owners of affected vehicles are being notified, and will need to report to their local dealership. The free repairs will replace the timing chain, chain guides and crank sprocket.
Take a look below for a short statement to Autoblog from Nissan.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

Nissan Titan Truckumentary looks back through the brand's trucks [w/video]

In a prologue last month, Nissan promised us more of its Titan Truckumentary in December, and here it is. This is a set-the-stage episode, surveying the brand's truck history in the US from the 1960 Datsun 1200, one of the first vehicles it sold here, to the first truck it manufactured here in 1983 in Smyrna, TN, to the nineties Hardbody and the 1999 SUT Concept, among others. Pickup-truck-lifer Brent Hagan, the product planner for the next-generation Titan - designed and engineered in the US - is our tour guide for this episode. If anything, after watching this video all we could think was, "Nissan, please bring back the good old days."