NHTSA Complaint #11351518 — 2017 VOLKSWAGEN GOLF R

PCV (POSITIVE CRANKCASE VENTILATION) VALVE MALFUNCTION. VW'S PCV VALVE, ALSO SOMETIMES CALLED THE OIL SEPARATOR VALVE, WHICH IS FOUND ON MANY OF THEIR CARS/SUVS BECOMES FAULTY AROUND 40-50K MILES. WHAT OFTEN HAPPENS IS THE THE VALVE FAILS TO VENT INTERNAL ENGINE PRESSURE, WHICH CAUSES THE PRESSURE TO BUILD UP WITHIN THE ENGINE. EVENTTUALLY THE PRESSURE WILL FIND SOME PLACE TO VENT, USUALLY OUT OF WEAKEST OIL GASKET POINT, OFTEN BEING THE REAR MAIN SEAL AND VALVE COVER. SINCE THE EXHAUST IS BEHIND THE ENGINE, THERE IS A CHANCE THAT OIL CAN SPRAY ONTO THE HOT EXHAUST. MY GOLF LEAKED OIL FROM THE REAR MAIN SEAL WHEN THE PCV FAILED. EVEN THOUGH THE CAR WAS UNDER WARRANTY, VW DIDN'T WANT TO DIAGNOSE THE PROBLEM UNLESS I WAS WILLING TO PAY FOR IT. THIS MALFUNCTIONING PCV VALVE IS A REGULAR PROBLEM ON VW'S AND COULD POSE A ROOT FAILURE LEADING TO A POTENTIAL VEHICLE FIRE.