General Motors is facing a new class-action lawsuit in Canada that alleges vehicles equipped with its naturally aspirated 2.4L Ecotec four-cylinder engine have a propensity to burn oil.
According to Car Complaints, the plaintiff in the lawsuit owns a 2012 model year Chevy Equinox crossover equipped with the 2.4L Ecotec four-cylinder engine. In September of 2017, the vehicle’s engine stalled and was later diagnosed with a complete engine failure. The problem was allegedly traced back to excessive oil consumption, with the plaintiff claiming affected engines consume as much as 0.946 litres of engine oil per 1,600 kilometres of driving.
Like other GM engine oil consumption lawsuits we’ve covered, this suit says the piston rings fail to maintain sufficient tension to keep oil in the crankcase, allowing the oil to sneak past the rings and fall into the combustion chamber. This can allegedly foul the spark plugs and also create carbon buildup on the pistons and cylinder walls. If the oil levels reach a certain point, engine components may become damaged and the engine may overheat, eventually leading to total engine failure.
Car Complaints’ reports this lawsuit also lists a number of other problems with affected 2.4L Ecotec engines, including defective spray kets, defective active fuel management system, defective PCV systems and defective oil life monitoring systems. These other issues compound with the defective piston rings to exacerbate the problem, the suit indicates.
Other oil burning-related lawsuits filed against GM in the United States have been thrown out, as GM’s warranty does not cover design defects, only manufacturing defects. The problems with these engines can be traced back to design defects, the automaker has argued previously, so its factory warranty is not applicable to these problems.
We’ll provide an update on the Canadian oil burn lawsuit against GM as it progresses through the Ontario Superior Court of Justice in the coming months.