Crankcase (pcv) Problems of Buick Regal

Pcv system failed causing excess pressure to blow out the rear main seal and crankcase seal resulting in an oil leak. No lights and no codes were on the dashboard. The only symptom was a high pitched squealing sound during very cold weather. The problem has been reproduced by the dealer. The problem first appeared the first winter owning the vehicle.

See all problems of the 2019 Buick Regal 🔎.

My Buick purchased November 2019 has the misfortune of having the 2. 0 ltg 4cyl turbo. Through research I have learned that catastrophic failure with the pistons is a common occurrence across the gm platform with same engines. This is likely caused by a misfire or preignition in the cylinder which which feeds on itself as it gets worse. Also the pcv system designed for a naturally aspirated engine not a turbo engine. This system functions only when there is no boost from the turbo. This cause gunk to build up eventually back flowing into #1. Since liquid will not compress it creates pressure in the cylinder damaging the rings. I purchased my car used with no warranty and exactly 100k. Even on the test drive I felt a misfire but was told it's nothing. Maybe my foot slipped. Five days later the preignition happened again. Change the plugs and wires and the problem went away for awhile. Three weeks later when I cold start the engine in the morning to warm up. It was exhibiting the same misfiring along with a fluctuating idle and excessive fuel being blown out the exhaust. Pulled the codes all it said was misfire in #2. Brought it in to service shop. They pulled the codes with nothing reporting. I was told it was a normal situation in the Buicks. Being naive and unfamiliar with the motor I believed them. I did find a gm service bulletin that did support what they said. Claimed it was double igniting to heat the catalytic convertor up faster. The engine continued to exhibit the same issues all along im being told nothing is wrong. Fast forward to last week the problem exponentially increased. Brought it into the dealer. They couldn't "find" anything though they agreed wasn't running right. March 7 another dealership. Yep something is wrong but the car is not saying anything. The tech went for a test drive and the motor failed. A bore scope revealed severe piston damage.

See all problems of the 2014 Buick Regal 🔎.

Vehicle back fire through the intake and smoke rolls out from under the hood when trying to start the vehicle, normally start good after sitting over night, but go to start it again it will back fire or the engine idle is very erratic before it will smooth out. I replace spark plug, spark plug wires, cam sensor, pcv valve, fuel filter check battery connection.

See all problems of the 1996 Buick Regal 🔎.