2014 Chevrolet Silverado 1500 Lt 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.

GM recalling over 243,000 crossovers over possible seat belt defect

2010 Buick Enclave - Click above for high-res image gallery
The summer of 2010's recall hit parade continues unabated today, with General Motors having just announced that it is asking 243,403 owners of its 2009-2010 Lambda crossovers to bring their three-row haulers in for inspection. The culprit? Second-row seat belts in select Buick Enclave, Chevrolet Traverse, GMC Acadia, and Saturn Outlook CUVs have "failed to perform properly in a crash."
According to GM, a second-row seat-side trim piece is to blame, as it can impede the upward rotation of the buckle after the seat is folded flat. As a result, if the buckle makes contact with the seat frame, cosmetic damage can occur, potentially requiring additional force to operate the buckle properly. So far, no great shakes, but in the process of applying that additional force, the occupant may push the buckle cover down to the strap, potentially revealing and depressing the red release button. As a result of this, the belt may not latch, or in certain cases, it may actually appear to be latched when, in fact, it isn't.

GM's European Opel division may eventually go all-electric

General Motors' Opel division in Europe may transform itself into an all-electric vehicle maker by 2030. Granted, a lot can happen between now and then, including a potential buyout by French automaker PSA Group. Regardless, Opel appears to view its electric future beyond the Ampera-e, which is the sister vehicle to the Chevrolet Bolt, and more like Tesla. Opel CEO Karl-Thomas Neumann indicated that focusing on electric drivetrains would be a superior strategy to expanding its EV technology while pushing forward with conventional drivetrains, says Automotive News Europe, citing comments Neumann made to German publication Manager Magazin. General Motors could make the decision to move towards an all-electric vehicle line for Opel as soon as May. Of course, that depends on whether Opel is bought out by PSA, the parent country to Peugeot and Citroen. PSA is in talks to buy General Motors' Opel and Vauxhall divisions, though government and labor representatives in Germany have expressed concerns over potential job losses from the proposed buyout, Reuters says. Regardless, GM has hinted at expanding its electric-vehicle line far beyond the Bolt, which has a 238-mile single-charge range and debuted late last year. Mary Barra, in an interview with CNET, said the Bolt's all-electric platform could be applied to a "huge range of vehicles," though wasn't specific about additional EV models. Opel first showed off its Ampera-e at the Paris Motor Show last fall. The name of the model raised some eyebrows because the Ampera badge had been previously used by Opel for the sister version of the Chevrolet Volt extended-range plug-in. Either way, Opel is looking to take on Renault for electric-vehicle sales supremacy across the Pond. Related Video: