Lawsuit claims GM trucks don’t run properly on American diesel

2015 Chevrolet Silverado HD General Motors line of diesel-powered heavy duty trucks are billed as workhorses, able to haul tens of thousands of pounds with impunity. Endless wells of hairy-chested torque from a 6.6-litre Duramax gets things rolling in a hurry.However, a class action lawsuit filed this week in Detroit seeks to put the brakes on certain models of GMs heavy-hauler, reports the Detroit News.Plaintiffs allege problems with the powertrains high-pressure fuel pumps, units manufactured by Bosch and installed in Duramax-equipped trucks from the 2011 to 2016 model years. According to the suit, the pump introduced metal shavings into the fuel injection system, leading to catastrophic and expensive damage.GM and Bosch declined to offer the Detroit News comment.At the root of this issue, say the complainants, is the composition of American diesel fuel. They claim it to be thinner than European diesel, a trait that allows for less lubrication and eventual degradation of the Bosch pumps. Plaintiffs in the suit say once this happens, debris finds its way into the engine.Lets examine this claim. As we all learned in Gearhead 101, modern diesel fuel is ignited under compression without a spark. A key indicator of diesel fuel quality is its cetane number, a measure of the fuels ignition speed that is, how long it takes to go bang! under compression. A higher cetane number indicates the fuel ignites more readily when sprayed into hot compressed air, such as the environs of an engine cylinder.Generally, diesel in Europe has a cetane rating of approximately 51, while the stuff on this side of the pond is generally rated around 45, except for a few areas in which a minimum of 48 is mandated (not to mention California, whose diesel fuel has a cetane rating of 53).For about the last ten years, all the American highway diesel fuel has been classified as Ultra-Low Sulphur Diesel (ULSD), a blend which lowered the measured sulphur content to less than 15ppm. This, the suit claims, is the root of the problem. The fuel pump used in the trucks in question, a Bosch CP4, was introduced in 2011. Plaintiffs claim it was designed for the European market and didnt play well when swilling American ULSD. This may be so, but it would behoove the smart lawyer to also note that the Duramax engines in question are not fitted with a lift pump. This is a bit of tech that takes some of the workload off the main pump the Bosch CP4, in this case.Without a lift pump, a low-pressure unit which pulls the fuel first, the CP4 is under constant suction and tasked with two jobs, drawing fuel and pressurizing it. This situation may introduce air bubbles into the mix since the pump is located waaaay up in the engine bay, a long distance from the fuel tank. The presence of air means the absence of liquid, and could help explain the production of metal shavings, which are claimed to be causing the expensive damage mentioned in this lawsuit.Regardless of the reason for the fuel pumps alleged degradation diesel quality or being overworked well be keeping an eye on this case as it works its way through the
Origin: Lawsuit claims GM trucks don’t run properly on American diesel

How to properly slam into wildlife with your car — to save your life

You may have seen a meme a few years ago, decrying how you’re more likely to be killed by a moose in Canada than by a terror plot. The implied message is that terrorism isn’t a big deal. But actually, it’s because moose are crazy-dangerous to Canadians. Between 2000 and 2014, 236 Canadians were killed after their car smacked into a moose. Add in collisions with deer, elk, bears, cougars, bison and coyotes, and in the last nineteen years, we’ve lost about as many Canadians to wildlife crashes as died in the Korean War. If you don’t want to be the next driver killed by a wayward ungulate, follow the tips in the video above to avoid wildlife collisions and, if that fails, how to properly smash your car into majestic Canadian fauna. You can also read a transcript of the video, below. Tip Number One: Don’t Speed We’ve all been there. You’re on a wide, dry, empty country road, and you wonder “why does it have such a low speed limit? I’m a good driver, I’ve got good tires, I can speed through here without any problems.” Well dingus, maybe traffic engineers set the speed limit low not because of the road design, but because this is an area where deer keep diving through windshields. That slow speed limit is there so you have enough time to scan the bushes for suicidal deer, and stop in time if one wanders into the roadway. Deer and moose are like giant drunk toddlers. They’ll leap in front of your car for seemingly no reason: So woe betide the driver who thinks he can speed by some roadside deer without them going all kamikaze on his weekend plans. Also, the faster the speed, the worse the collision. Hit a deer in a school zone, and the only damage done is to your pants. Do it at 120, and your funeral is closed-casket. Crash victim Michelle Higgins’ car is seen May 23, 2012, at the local bodyshop in Gander, Newfoundland, following a visit to the crash site where she hit a moose. Doctors told Higgins she went into shock, explaining why she continued to drive to work oblivious of the damage. Victoria Higgins / Supplied Anyone who’s driven from Edmonton to Vancouver knows that Highway 16 slows from about 110 km/h to 80 km/h as you pass through Jasper National Park. The reason they do that is because they don’t want you ploughing your BMW through mountain goats. So, if you don’t like getting moose antlers stabbed into your heart, pay attention to your speed, particularly at night. The majority of wildlife collisions happen between 9 pm and midnight. And those wildlife crossing signs aren’t there for fun: If you see one of these, it’s because you’re entering a stretch of roadway that’s slick with deer blood a lot of the time. Tip Number Two: Don’t Swerve Here’s a sad thing that happens a lot: Someone sees an adorable animal in the middle of the road, so they swerve their car to avoid it, and they end up killing someone. In November, a 24-year-old Regina woman was killed after she swerved to avoid hitting an injured deer, and ploughed into the back of a semi truck. Two months before that, a 27-year-old Halifax woman swerved to avoid an animal in the middle of the road, causing a crash that killed her passenger. That’s why: Never swerve. By trying to save an animal’s life, you could end up causing infinitely more carnage than a dead squirrel. After all: An animal isn’t a telephone pole: You might swerve just to have it jump in front of you anyway. Besides, you just polished off a bacon Whopper, and suddenly you’re St. Francis of Assisi? Don’t risk people’s lives to save a duck. If you’re a collision course with an animal, just brake as much as you can and blow the horn. The one possible exception is if you’re about to hit a moose. Moose are particularly deadly for drivers because they’re basically 600 pounds of meat on toothpick legs. In a crash, your hood goes through the toothpicks and the animal flies through your windshield; so swerving can potentially ward off a direct hit. But here again, you’ve got to be careful. If swerving around a moose means steering into oncoming traffic, don’t do it. And if you’re driving a truck or SUV, you probably shouldn’t do it either. Vehicle safety analysts have a test, appropriately called the moose test, in which a car driving at high speed swerves around a stationary point designed to mimic a moose. Even with a professional driver behind the wheel, a surprising amount of cars don’t pass the test and end up rolling over. If you hit a large animal and your car is low enough, the animal itself can slide up the hood and smash through the windshield if it’s fast and heavy enough. Jonathan Hayward / The Canadian Press Tip Number Three: If Collision Looms, Release the Brakes at the Last Minute In most vehicle collisions, particularly fatal ones, you usually don’t see the animal before it slams into you. That’s why, as I mentioned in the opening, the best way to keep bear fur out of your grille is to slow down, stay alert and continually scan the ditches for glowing eyes. But
Origin: How to properly slam into wildlife with your car — to save your life