EASIEST WAY to check “pcv system” (audi, volkswagen) 2.0t

[Roh_Echt]

The PCV on this engine "is meant to apply vacuum to the crankcase" when not operating in boost. This is to improve sealing at all seals, rings, and valve stems. When not in boost, the PCV routes crankcase vapors from the PCV to the inlet manifold; via the corrugated tube. When boost 'is' present, a check or one-way valve in the PCV (where the manifold tube connects to the PCV) shuts to contain boost in the manifold. The PCV's large diaphragm then opens to evacuate crankcase vapors, for recycling, via a different route. This → When the large diaphragm opens, a second check valve in the PCV opens, to allow vapors to escape through the rocker/valve cover, through the rear vent tube, and into the turbo inlet; for vapors to take the long way around to be recycled. There are two distinct designs of PCV on this engine. You may notice the rear vent tube comes two ways; one with no valve in the upper opening, meant to be paired with the Rev.-R PCV. And another with a valve set in black plastic at the upper opening of the rear vent tube; meant to be paired with the Rev.-P PCV. However...the Rev.-R PCV will work with either rear vent tube...where the Rev.-P only works properly with the valved rear vent tube.

[MiniHp]

its the other way around, if you crankcase is under high vacuum its bc the diaphram is torn and the spring is keeping the valve open allowing full manifold vacuum in the crankcase.

[francois]

I have a 2008 audi a3 1.8 tfsi, just replaced the PCV assembly and Pipes. Mine does exactly the same, dies when you remove the Oil Cap, My Audi runs perfect. That's the way these newer Direct Injection Engines are designed. When you take the Oil Cap of an older natural aspirated vw engine, you get positive Crankcase pressure. it blows, lol 😂

[luiscfc]

It's the opposite mate, If you're engine runs like that or if there's suction you're pcv valve is open due to a tear or cracked

[spelunkerd]

I don't know much about turbos, but that seems like a tremendous crankcase vacuum for a car that is idling. Aren't you worried about blowing out seals? In an older video by Southmainauto, he shows an older VW with that level of vacuum and lean codes. After replacing the PCV the crankcase vacuum while idling is significantly better than shown here.

[arnoldvanblanken]

Lol, I was just searching here because my engine was doing the same thing when I loosen the oil cap 🙂 luckily its by design 😀

[Nuclear]

its depends how suck air if suck so strong and hard take off oil cup then PCV bad if just you take off oil cap without pressure then PCV good .

[pabloarduino]

Can you confirm if this method also works on a 1.8T 20v engine? Mine's burning lots of oil (168k miles. Burns 1 qt every 1200 miles, new turbo, valve seals been replaced 4 years ago. If i take the dipstick or the fill cap, engine keeps running with no problems. Thanks!

[robertjackson]

Very conflicting comments, it will be nice when we can use a Manometer to numerically measure the crankcase vacuum and know exactly what the numbers are. Plug it in to the Dipstick tube and remove all doubt. No more shake it to tell if it's good. That might tell you if it's bad but it won't tell you if it's good. That's a problem.
We wouldn't do this with oil pressure and the PCV System is every bit as vital. Watch how long this Acura crankcase is under pressure after a WOT run. Way too long and with 23inHg of engine vacuum the PCV Valve should've responded much faster with crankcase vac. I've since changed/gutted the OE valve and fixed this with a PCV Valve from a V8 GM engine, an orifice and a Catch Can. I now have the needed 1 to 3inHg for it to work properly. OE's don't always do everything right. All Acura/Honda engines have the PCV System almost turned off with too low of a vacuum. Search Oil Consumption Acura or Honda and you'll see what it causes. Many other brands do the same, Toyota, Volvo, BMW and others. Good for the oil companies bc it loads the oil up with the contaminants that should be pulled out. The vac is so low I have to use the Manometer($32 bucks) in H2O scale to get any resolution.
What OE had it set to;
After I changed it;
HIH

[joaquinjr]

So I took off my oil cap and my cars engine started running rough and my rpm gauge was increasing. Could this be a bad pcv valve? I got the code p0507 “RPM Higher Than Expected”

[abze]

What do you do if you have this same issue mine doesn’t start with oil cap on only starts without oil vedy weird

[NhatNguyen-xskl]

Is this the same for Audi b8 s? I have a P2177 code, system running too lean

[Powerhouseproductions]

What happens if I take off the oil cap and nothing changes?

[theeinsuranceguy]

My rs5 has 2 tho. Do I just do one at a time to see if one is possibly bad? If the car stays on when remove cover, that means it's bad?

[gurvindersingh]

My 2015 jetta also increased air pressure when I open oil lit and I change my PVC valve but it’s still same nothing changes . Please suggest me something .

[ingrm]

Can a faulty pcv valve cause a false misfire engine management code. Or would the misfire be genuine?

[adhikarautomo]

Is this happen on Naturallt Aspirated engine too?
Mine has mist of oil on its engine cover. Have replace the oil cap. No oil level problem. But there still oil mist on it.

[macauleyholmes]

So I did this with my s3 8v 2015
I took my dipstick out, my revs went up. All sounded normal but revs raised
This normal?

[ericdaye]

What if you take the oil cap off and there s no vacuum

[brd]

I swear down this is wrong, no way should your engine be creating that much vacuum inside