Chevrolet Avalanche Ltz 2008 on 2040-cars

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Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

Stolen '79 Vette finds home at Dream Cruise [w/video]

After over three decades of waiting, George Talley finally has his 1979 Chevrolet Corvette back, and it's as good as new. The coupe was stolen off of a Detroit street in 1981, but last year Talley received a call that the 'Vette was found in Mississippi. General Motors Executive Vice President Mark Reuss heard the touching story and had the automaker help get the car back to the Motor City. Now after a restoration by the GM Heritage Center and Autometric Body Shop, Talley got the keys to his Corvette back during the Woodward Dream Cruise. When Autoblog spoke to him after the coupe was returned last year, Talley said that the first thing he wanted to do with it was, "I think I'm going to cruise Belle Isle." We hope he enjoys the drive because the experience is a long time coming. You can watch Talley's excited reaction to see his newly refurbished 'Vette for the first time in the video below. Stolen Corvette Reunion and Restoration on Display at Woodward Dream Cruise 2015-08-14 DETROIT – George Talley's 1979 Corvette was stolen 33 years ago and recovered last year in Mississippi. General Motors executives, who heard of the recovery, offered to bring the car back home to Mr. Talley and restore it on his behalf. The GM Heritage Center, in conjunction with Autometric Body Shop in Center Line, Mich., took on the restoration project. Talley got an opportunity to see the progress ahead of its official reveal at the Woodward Dream Cruise on Saturday. Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 115 countries and selling around 4.8 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature engaging performance, design that makes the heart beat, passive and active safety features and easy-to-use technology, all at a value. More information on Chevrolet models can be found at www.chevrolet.com.

VW Finds CO2 'Irregularites', SEMA Recap, and More | Autoblog Minute

Volkswagen's diesel emissions scandal gets a new wrinkle, US regulators hit Takata Corporation with a substantial fine, and we head to Vegas for a look at tuner paradise at the 2015 SEMA show. Autoblog Senior Editor Greg Migliore reports on this edition of Autoblog Minute Weekly Recap. Acura Chevrolet Honda Mazda Mitsubishi Toyota Autoblog Minute Videos Original Video Acura Legend