Crankcase (pcv) Problems of Volkswagen Jetta

I also suffer from major oil loss in my 2014 Jetta se 1. 8. I had codes pop up telling me to replace some sensors, and turns out my oil was just very low. Within the first month I had the vehicle, purchased used in 2020, the engine was completely dry causing me to question the dealership's promise that an oil change wasn't done. I just replaced the pcv valve, but now I'm getting p0301 and p03af codes, and my car barely made it to work this morning. I had a successful test drive last night without any issues, but now I'm afraid to drive it at all without putting the old valve back in.

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The first thing I noticed after driving the car was the smell of burning oil occasionally, then upon opening the hood and removing the engine cover there was minor oil seepage from the valve cover. The car itself is 2012 Jetta gli and only has about 27,500 miles as I type this message. But it gets worse, I notice the oil level dropping and having to put refill it about 2 or 3 times a month. At this point I know something isnt right and its not just a faulty valve cover gasket. Did some reading online and I suspected it was a faulty oil separator/pcv system creating too much crank case pressure. I also checked the rear main seal recently and see oil leaking between the motor and transmission, suggesting the rms has began to fail. My question is if the car was "certified pre-owned" and pcv valve failure is some what common for both tsi and fsi engines, why wasnt the vehicles pcv inspected for failure or changed entirely with the new revision? there are many revisions on the oil separator/pcv valve from what I see. Shouldn't the damage to the rms replacement be covered by the manufacturer since it was due to premature failure of the oil separator, that is known to be prone to failure or faulty from the factory? currently im not driving the car and waiting for the newest revision of the oil separator but since the rms has already began seeping oil its only a matter of time before it fails completely. Being a trade school student who is lost his job right before christmas last year this unexpected failure of the rear main seal at only 27,500 miles, regardless of vehicle age is unexpected and at a severe inconvenience. If Volkswagen cannot provide at least the labor cost for the rms replacement I cant say ill ever buy another vw from a dealership again.

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My pcv valve got clogged which caused the rear main seal to blow out causing a lot of damage. This is not supposed to happen at this mileage. Volkswagen has acknowledged they are receiving a lot of these vehicles between 80k and 100k, unacceptable. They are not covering any repairs. There has been 3 revisions by Volkswagen to the pcv valve thats in my vehicle but they won't acknowledge mine is faulty. . Why did they remake it 3 times? also model years before me had pcv valve recalls for this exact reason. Thank you.

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Car is 2009 Volkswagen Jetta tdi 2. 0l common rail inter cooled turbo diesel. L issue occurs after driving in below freezing weather, and attempting to restart after weather has gone above freezing (such as driving to work in freezing weather, temps warm up during the day, occurs on attempt to drive home). Vehicle will start, then die after a very brief run of 5 seconds or less. Restarts will range to very long cranking before a very rough run, or no cranking with all lights an equipment going out due to very high amp draw on starter motor. Water and oil is noted dripping from the inter cooler piping as it leads to the engines intake. Piping removed to allow some water to drain out. After several attempts of 1 revolution at a time, car will start to turn more and more if a pause of 30 seconds between attempts is allowed. Suspected water sucked into combustion chamber and hydro-locking engine. Water is suspected to seep past the piston rings into the crankcase while pausing between start attempts. This is proven with frothy moisture on the oil fill cap after each incident. Suspected issue is moisture from egr system goes into intake air, and is freezing in the inter cooler in freezing weather. When weather warms up while the car is off, the water will pool in the inter cooler piping. Upon attempted restart, water is sucked into the engine causing anywhere from some rough stumbling to full hydro-lock. Incident has happened 6+ times in varying severity. Issue is known to happen to CO-workers car with the same turbo diesel engine on the same day. No codes thrown for any occurrence via obd tester. One time, the glow plug light flashed several times.

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The oil crank case developed a crack, causing oil to leak onto the ground. The cause has yet to be determined.

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The vehicle is a used 2002 Volkswagen Jetta 1. 8t, standard transmission, 1) the vehicle was purchased used in 08/2004 and was driven normally for transportation of my family. The check engine light came on several weeks after purchase. 2) the car began stalling frequently at all points of operation. The engine would simply stall at such points as comeing to a stop, accelerating, slowing for turn, or regular driving on freeway and surface streets. 3) we have taken it to the same dealership of purchase four times over five months for this same problem that is covered by the original factory warranty. Parts replaced (from earliest to most recent visits): 1) mass air-flow sensor, transmission reset; 2) pipe from pcv to 3-way hose by valve cover, 1/2 moon seal below chain adjuster, cam seals, breather valve; 3) turbo recirc valve; 4) mass air-flow meter.

Vw Jetta tdi- the turbo hasn't been working. Apparently, this vehicle is equipped with a ccv (crankcase vent) system and an egr (exhaust gas recirculation) system. Oily fumes from the ccv system combine with carbon particles from the egr system to form a black sticky tar in the intake system. This eventually starts restricting the amount of airflow into the engine, resulting in gradual power loss as the vehicle ages and the intake clogging becomes worse. This is apparently preventable by adjusting the intake air volume of 370 mg/stroke using a computer to reprogram the egr. Replacing the manifold & egr is an expensive proposition that is not covered under the powertrain warranty.

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