Alleged issues with excess oil burning
Multiple lawsuits filed, some already dismissed
A new report says that General Motors has been hit with a class-action lawsuit once again over problems alleged with the fourth-gen 5.3L Vortec V8 installed in 2010-2014 Chevrolet and GMC full-size trucks and SUVs.
The suit was filed in US District Court in the Northern District of Ohio, reports GM Authority, and it’s just the latest in a series that have been filed in jurisdictions around the country over the last few years. It’s said to be the third such suit filed this year.
At issue in the engine are alleged oil consumption problems that are said to be related to the positive crankcase ventilation valve on the engines. That PCV valve is designed to ensure that the engine’s sump doesn’t become pressurised (by venting that extra air into the intake), but the suit claims that the system is pulling oil out of the valvetrain and into the intake where it is burned off in the cylinders. It also claims that the piston rings fail to maintain crankcase pressure and that a faulty oil pressure valve sprays oil into the piston skirts, sending oil into the combustion chamber.
In addition to excess oil burning fouling sparkplugs and possibly damaging emissions controls systems, it can lead to low oil levels in the engine and severe damage.
While there are various Technical Service Bulletin fixes, the suit alleges they’re only temporary fixes.
Last month, GM Authority reports, a similar nationwide class-action suit was dismissed in Ohio by a federal judge saying that the “named plaintiffs lack standing to assert claims under the laws of the states in which they do not reside or in which they suffered no injury.” A separate complaint that GM was breaching the terms of its warranty agreement was also dismissed as the defect was allegedly one of design and such defects are not covered under the warranty.