How To Clean Pcv Valve Audi A4
ten-08-201907:22 AM #1
Agile Member 2 Rings
Clean PCV? Or should I only supercede? 2.0T
I've searched and tin can't find anything on cleaning...only replacing the whole unit or the diaphragm. And so before I pull it off to check it out, is information technology possible to clean or should I merely get a whole new unit?
2022 2.0T is consuming almost a quart of oil every 1k miles. I've seen from searching that Audi says that's "normal" but this is only more recently. Previously it was consuming a one/2qt per 1k miles.
Afterwards seeing some leaking at the upper timing concatenation embrace gasket, doing the suction tests with the dipstick, and noting the increased consumption, I bought a new Dorman kit for the diaphragm. That turned out to be a waste of coin, inside 3 months it ripped and I was throwing a CEL. When I did the chore I noted the diaphragm I pulled out was a thicker, not-rubber orange fabric. Not sure if Audi updated it or if it is an aftermarket piece. I put that back in and all is well, but I'g all the same consuming oil. I'm guessing information technology'south gunked upwardly internally, just is the only option to replace? Anyone ever attempted to pull it autonomously and make clean?
x-08-201907:27 AM #2
Veteran Fellow member Four Rings 
#one you don�t take apart the PCV you replace it...
#2 there�s virtually a 99.9% chance replacing it will non help your oil consumption. You need piston rings.
Post the vin
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10-08-201908:17 AM #3
Senior Member 4 Rings
The Dorman replacement diaphragm kit is only to replace a torn diaphragm. And yous would replace only the diaphragm, non using the bound in the Dorman kit. You'd know the diaphragm is torn because yous'd have a loud whistle, misfires, rough idle, and visually information technology would be obvious. The PCV tin fail in various other ways, including incorrect operation by any of the cheque valves inside.
You lot didn't mention, did yous take strong vacuum in the crankcase, preventing piece of cake removal of the oil filler cap while the engine is running? If so, so it would seem the PCV is passing the manifold vacuum to the crankcase incorrectly. Probably ane of the diverse check valves is stuck. Pull the PCV and check the safety valve on the bottom. Apparently, that can get gunked upward and neglect to operate correctly. If you want to really determine if information technology's the PCV, install a new PCV unit of measurement. You'll never go it dorsum together 100% if you have it apart. Exist careful with the bolts. 11Nm torque spec, and that aluminum head is soft.
2009 A4 Avant ii.0T quattro Prestige, 234k miles
x-08-201909:21 AM #4
Established Member Two Rings 
I would but supersede the PCV valve. I'm doing mine this weekend. I don't have oil consumption issue. Car merely has 45k miles so just doing information technology for preventive maintenance.
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10-08-201909:32 AM #5
Veteran Member 4 Rings 
NEITHER, delete that crap, it just sprays oil on the valves i went with the 034 kit and drain plug to oil pan so it. Never has to be drained.
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10-08-201912:05 PM #seven
Veteran Member Iv Rings 
Originally Posted by Audi 4 Life 
NEITHER, delete that crap, it just sprays oil on the valves i went with the 034 kit and bleed plug to oil pan so it. Never has to be tuckered.
I'm surprised that a company similar 034 would fifty-fifty offer a render kit for their take hold of can. By removing the block purge role provided past the PCV/PRV/Oil separator combination valve the take hold of can set upwardly tends to generate h2o vapour that mixes with the oil accident-by to grade a lot of gunk. Fortunately the catch can and so fills up with the gunk information technology creates and tin exist emptied at regular intervals.
Dumping the gunk dorsum into the oil pan doesn't sound similar such a practiced idea to me.
(pic provided by Nano909)
'03 A4 v-MT Motoza tuned Frankenturbo F21L With full supporting mods. Designated dog and bike hauler.
'thirteen A5 half dozen-MT Needs more Fun Stuff : Neuspeed PM / iii.0 TDI intercooler / H&R OE Sport Springs / B8 shocks / TyrolSport Brake Stiffeners / ECS Brusque Shifter
x-09-201912:02 PM #viii
Veteran Member Four Rings
Originally Posted by old guy
I'thousand surprised that a company like 034 would fifty-fifty offer a return kit for their catch can. By removing the block purge function provided past the PCV/PRV/Oil separator combination valve the take hold of can set tends to generate h2o vapour that mixes with the oil blow-past to form a lot of gunk. Fortunately the catch can and so fills upwardly with the gunk information technology creates and tin be emptied at regular intervals.
Dumping the gunk dorsum into the oil pan doesn't sound like such a good idea to me.
(moving-picture show provided by Nano909)
Where did that film come from? Information technology looks like oil and coolant mixed ive never seen water in my cans. And i practise non allow the Build of up water vapor because i never drive my car and shut information technology off without having brought to temp for proper peroid to let it toburn off.
I haven't had my drain line on for long just installed since i rebuilt my head, manual bandy, and shit ton of other stuff so thankfully the drain line hasn't been on long incase its harmful but seems many variables and factors matter.
whenever i tuckered my Tin earlier I had bought so drain kit it was only oil, i didnt see water from what i could tell I know theirs water vapor in the engine which tin accumulate under some condtions. Simply it seems similar theirs many factors to situation climate, fluids etc. I live at high altitude desert thus its very dry here.
I think this effect mostly comes from people who drive their car and shut information technology off without letting water vapor burn off and builds upward.
But i also utilise Motul 300v religous Brusk OCI which fluids similar that are already non deisnged for long intervals so peradventure i never noticed it in my can before because i have barley put 20k on my car in v years of ownership.
And ive done over 20 oil changes during that fourth dimension period. (Partly cuz i did a meg short intervals cleaning the internals. I dont like additives).
That said i recall im going to disconnect the banjo connector to the oil bleed plug and mount it clean for easy access to beused for draining.
Tried calling 034 to see what they say no answer. On any dept.
https://store.034motorsport.com/catc...agen-2-0t.html
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10-09-201901:xi PM #ix
Veteran Fellow member Four Rings
Originally Posted by Audi iv Life
Where did that motion picture come from? Information technology looks like oil and coolant mixed ive never seen water in my cans. And i do non permit the Build of upwards water vapor because i never drive my car and shut it off without having brought to temp for proper peroid to allow it toburn off.
The moving-picture show came from this thread. Clicky click�. Read from the link to the cease of the thread. Without the PCV purge air you are no longer actively removing the condensation that forms in your engine.
'03 A4 v-MT Motoza tuned Frankenturbo F21L With full supporting mods. Designated dog and bike hauler.
'thirteen A5 half dozen-MT Needs more than Fun Stuff : Neuspeed PM / 3.0 TDI intercooler / H&R OE Sport Springs / B8 shocks / TyrolSport Brake Stiffeners / ECS Short Shifter
10-fourteen-201908:25 PM #ten
Veteran Member 4 Rings 
Another idea on this, for those of us in cold climates, h2o in the oil is very deadly. Look at this block of ice in an oil pick up from a B7. This is still in that location after all the time it took to pull the pan.
11 A4 Q, Prestige, Black
157,000 miles, APR Stage ane
x-fifteen-201907:59 AM #11
Veteran Fellow member Four Rings
Originally Posted by mtroxel
Another thought on this, for those of usa in cold climates, water in the oil is very deadly. Wait at this block of water ice in an oil pick upwardly from a B7. This is still there after all the fourth dimension it took to pull the pan.
Which is exactly why I keep harping on the downside of removing the purge air function provided by the PCV/PRV combination valve.
'03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. Designated dog and bike hauler.
'13 A5 6-MT Needs more Fun Stuff : Neuspeed PM / 3.0 TDI intercooler / H&R OE Sport Springs / B8 shocks / TyrolSport Restriction Stiffeners / ECS Brusque Shifter
x-16-201901:35 PM #13
Veteran Member Four Rings 
if yous have oil consumption and you are looking at saving a few pennies by cleaning your pcv you are in for a very nasty daze of VAG ownership.. ....
2014 A4 2.0TQ Technik
2006 A4 2.0TQ 6spd
1978 Porsche 911SC Targa
1976 Yamaha XS 360
x-16-201909:42 PM #15
Veteran Member Four Rings
I really hope the pcv fixes it for you lot..and is worth dropping the c note to find out. I had to pull my 14 and re build it..
Was more than than a c note 
O/T pics
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Last edited by Theiceman; ten-17-2019 at 09:34 AM.
2014 A4 2.0TQ Technik
2006 A4 ii.0TQ 6spd
1978 Porsche 911SC Targa
1976 Yamaha XS 360
Source: https://www.audizine.com/forum/showthread.php/872396-Clean-PCV-Or-should-I-just-replace-2-0T
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