This allegedly causes excessive contact between the connecting rods and connecting rod bearings, finally causing the bearings to disintegrate and fracture. In addition, the oil is necessary to reduce wear on moving engine parts, improve sealing and to cool the engine by carrying away heat from the moving parts.Īccording to the lawsuit, the defect causes an insufficient supply of oil to coat the bearing surfaces and doesn't make a good enough oil barrier between the bearings and the metal parts they are designed to protect. It's the job of the engine oil to lubricate the piston, cylinder wall, connecting rod bearings and other rotating and moving components as the piston moves up and down. As a result, the connecting rod bearings allow the crankshaft to rotate within the connecting rods. The pistons are connected to the crankshaft via the connecting rod and as the connecting rod moves up and down, this causes the crankshaft to rotate and send power to the wheels.ĭuring this cycle, the crankshaft rotates many thousands of times per minute within each connecting rod, so to reduce friction and make the engine last longer, a bearing placed between the connecting rod and crankshaft surfaces. The EJ engines use four pistons to convert pressure into a rotating motion while gasoline is mixed with air in the combustion chambers of the engine. The 2013-2014 Subaru Impreza WRX and WRX STI models were manufactured with Subaru’s EJ “short block” engine, a dual-overhead camshaft 16-valve turbo four-stroke engine manufactured by Subaru. Subaru WRX and WRX STI engines allegedly fail because connecting rod bearings fall apart.Ī Subaru WRX and WRX STI engine knock and spun bearing lawsuit alleges metal debris contaminates the oil from defective connecting rod bearings and causes total engine failure.Īccording to the proposed class-action lawsuit, 2013-2014 Subaru WRX and WRX STI cars have defective rotating assemblies and engines that aren't lubricated enough by the oil that contains the metal debris.Īccording to the lawsuit, the Subaru Impreza was first manufactured in 1992, then Subaru started building the “WRX” (short for world rally) version of the Impreza.
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