[TRespect]

You're welcome
Here is a link on how it works. Not exactly the same design but similar concept:

http://mgaguru.com/mgtech/engine/cv103.htm


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[TRespect]

Thanks, TRespect Really great, looks like I'm a 3.2, that was the only one sold in Australia, it looks like diaphragm should fit?



Paul

On the 3.2 you cannot change the diaghragm part only. You can find a compatible upper part assembly but my advice is to stay oem and get the whole pcv unit at about 120/130€.


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[mountainreg2]

Sorry can't send PM's yet, here's the late reply,


Before I had a chance to photo I put it back together with some silicone, been waiting for the silicone to dry, before installing.

Probably won't work, but I will test tomorrow. When I opened it up the diaphragm was only torn on the outer edge, it was very small, maybe 2 cm's centre = no problem.

After handling it broke some more, so we will see. I have ordered a replacement. but I may need the car for an emergency.

I didn't notice any strange sounds. but I did notice that there was air blowing out when the car was idling.

Paul

Hi,

Can you please post or send me pics of the torn diaphragm?
I need to compare and see if it looks like the one I have, especially at the center.
Thanks.




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[TRespect]

Punctured or torn pcv diaphragm = problem whenever you're breaking/releasing the throttle you need the diaphragm to be drawn down by the intake vacuum and thus close or balance flow from engine to intake. If it is torn it won't perform the job and too much engine pressure is released/sucked through the pcv to the intake. You can get away with a torn diaphragm when the engine is on load only I guess. At least that's what I understood from my digging about the subject.
Be careful as the pressure can blow the silicone. Add some zip ties if you have any to hold the top part to the bottom part. And also be careful not to add any silicone inside the pcv as it will be swallowed by the intake and this can cause major issues. Better wait for the replacement.


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[mountainreg2]

Super good advice will be waiting for the PCV.

 

[Ckeeler1]

I have the 2004 V6 with the same issue and it end up being the sump in the oil pan. (There's a screen that gets clogged in the oil pan.)

 

[TRespect]

Yes. That's another valid cause if you don't do oil services or if you don't use the right oil and filter. A faulty oil pump can cause this too.
On my audi I was using castrol and doing oil changes every 10k km since i bought new so I rejected this oil screen clogged idea and looked for other causes till I found the pcv.
On a second high mileage car I would have checked the oil screen too.
But let's hope it is just the pcv especially that Paul found a punctured/torn diaphragm.


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[Ckeeler1]

Yes. That's another valid cause if you don't do oil services or if you don't use the right oil and filter. A faulty oil pump can cause this too.
On my audi I was using castrol and doing oil changes every 10k km since i bought new so I rejected this oil screen clogged idea and looked for other causes till I found the pcv.
On a second high mileage car I would have checked the oil screen too.
But let's hope it is just the pcv especially that Paul found a punctured/torn diaphragm.


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You make good points; glad you have solved your particular issue.

I should have done my own oil changes much sooner in the game (made the mistake of trusting the lube chains / franchises with selecting the proper oil for my Treg).

Oh well - live and learn, right!?!

 

[TRespect]

Update?


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[mountainreg2]

Thanks TRespect for all your help, again.

Today the Chinese PCV arrived, looks good, and seems to work, no road test yet. But starts and does the right thing in the driveway.

https://www.ebay.com.au/itm/PCV-Cra...e-Vent-Valve-w-Hose-022103765A-for-VW-Touareg-3-2L-V6-2004-2006-BT/163270250297

And the price is hard to beat!

Paul

 

[TRespect]

Good to know.
Please update us with the test drive.
If this fixes the issue you can either keep the chinese pcv and see if it lasts or upgrade to an oem one. I'm using the aliexpress one but I don't use the car very often.
You can also just replace the diaphragm next time but I hope you won't need to
https://www.ebay.com/itm/Membrane-valve-cover-VAG-3-2-V6/253653380253?_trksid=p2485497.m4902.l9144

 

[Ckeeler1]

Yes. That's another valid cause if you don't do oil services or if you don't use the right oil and filter. A faulty oil pump can cause this too. On my audi I was using castrol and doing oil changes every 10k km since i bought new so I rejected this oil screen clogged idea and looked for other causes till I found the pcv. On a second high mileage car I would have checked the oil screen too. But let's hope it is just the pcv especially that Paul found a punctured/torn diaphragm. Sent from my iPhone using Tapatalk

Hi again.

I have a quick follow up question- Since the oil screen is inside the sump/oil pan on our car (I have the same model as yours) - is there any other way to flush out the gunk besides manually removing the oil pan and cleaning it out and/or replacing it?

My 2004 Touareg has 180K miles, so I am way past worrying about flushing the engine or sump, given my high mileage.

Thanks!

 

[TRespect]

Short answer no for me. There are videos on youtube with miracle products but I don't buy. Seeing how I found the inside of the valve cover even with the cover off I had a hard time cleaning the gunk.
Best thing is use a brand oil and filter and replace every 8 or 10k km if you can and have the sapce and tools to do the job.
Now for the gunky part: there are three parts which need to be serviced:
1. il separator inside the valve cover => this one I found almost blocked on the side which is supposed to drop the oil back to the engine.
2. The PCV
3. The oil screen in the sump.

But if you have had the car from new and have used good oil I don't see the need to open up the valve or the sump unless you have issues.
The PCV can be very easily replaced as a serviceable part or at least checked.

Now can you do a test for me please?
Can you watch the video and repro the behavior on your 3.2?

I've had people saying it is normal even on new VR6 cars.
A Tuareg v6 owner reported the same thing.

VR6 owners say the engine has lungs

See my other thread about the valve cover:

https://www.clubtouareg.com/forums/f95/3-2-valve-cover-gasket-replacement-284387.html

 

[Ckeeler1]

Seeing how I found the inside of the valve cover even with the cover off I had a hard time cleaning the gunk.
...
Now for the gunky part: there are three parts which need to be serviced:
1. il separator inside the valve cover => this one I found almost blocked on the side which is supposed to drop the oil back to the engine.
2. The PCV
3. The oil screen

Now can you do a test for me please?
Can you watch the video and repro the behavior on your 3.2?

I've had people saying it is normal even on new VR6 cars.
A Tuareg v6 owner reported the same thing.
0
See my other thread about the valve cover:

https://www.clubtouareg.com/forum s/f95/3-2-valve-cover-gasket-replacement-284387.html

Thanks TRespect.

My PCV has been replaced twice recently (the second time due to the first one being faulty).

I took a picture of the under part of my truck when I was under there earlier today and I used a lamp so that you could see where the oil leak is coming down onto the transmission. Before I knew I was going to show you a picture I had already cleaned part of it but if you zoom in you can see where the fresh oil is.

I think I have some of the same issues with the separator inside the valve cover that is my highest suspicion at this point.
My theory is based on your most recent information since on the oil coming down onto the transmission from the top of the engine (valve cover). ( I have attached a picture showing this)

Also, I looked at all the video links and other threads + took a video of my car running and I just need to figure out if I can attach it / send it to you. I may just do a private message within the Touareg forum and send you a link to a Google Drive folder where I can park the mp4 video file from today.

Thank heavens my Touareg doesn't sound as severe as the YouTube video. Holy cow! That's pretty crazy - I've never seen aluminum inflate like that! Not just lungs but spooky lungs (just in time for Halloween)!

 

[Ckeeler1]

TRespect - here is a link to the MP4 file:

https://drive.google.com/file/d/1nKNF178fxtr3YUH12U_jNAcx-q4YwoLa/view?usp=drivesdk

 

[TRespect]

Thanks for the test. i will check the video.
I had the same oil on the transmission issue and it was the valve cover gasket.
Oil on the spark plugs is a sign of valve cover gasket leaking too.
The intake is plastic and not aluminum.
I'm still looking for confirmation whether this is normal or not.
I can help with the valve cover gasket replacement. I will update the thread with some info on that.
The oil separator is a basic plastic piece, nothing fancy. I will upload pics. Even if it is gunked oil will still go back to the engine via another route.
Your best bet now is to check the plugs and the valve cover gasket.
It's not a complicated job. if you have mechanic to do it you have to make him clean/prep the mating surfaces and use a sealant with the gasket.

 

[TRespect]

I just checked the video. I don't see you rev the engine. Did you do the same test as in my video?

 

[Ckeeler1]

I just checked the video. I don't see you rev the engine. Did you do the same test as in my video?

Oh crud. I didn't rev the engine. Oops.

I'm in the middle of another repair, but I shall redo the test & video properly.

I took 2 years of auto shop back in high school and have been working on my cars since, so opening up the top of the engine would be fun.

She is my second car now, so I have more luxuries (time, the ability to goof around, etc).

Very big or messy jobs I tradionally leave to my indie mechanic / shop, though lately they have blundered a few things when working on & reassembling my car (and I hold them to the fire ).

The irony is - they should have just replaced the valve gasket when they had the top of the engine apart for something else. At least they SHOULD HAVE. Ugh.

I'll check that now also. Because Im 99% sure a new gasket kit wasn't on the invoice. (Crap - I'm gonna be mad as a hornet if they overlooked that...Why do I keep letting other people touch my car???)

 

[TRespect]

ahaa I try to keep people off my cars as much as possible.
Check your spark plugs and inspect the gasket where you can. The Valve cover is hidden by the intake.
I noticed your engine does not sound right in the video !!! Did you have any other issues with it?

 

[Ckeeler1]

Possible Spark Plug Oil & Intake Manifold / Valve Cover Gasket Condition

ahaa I try to keep people off my cars as much as possible.
Check your spark plugs and inspect the gasket where you can. The Valve cover is hidden by the intake.
I noticed your engine does not sound right in the video !!! Did you have any other issues with it?

TRespect - Thanks for the helpful post / insights; I will check the plugs for oil and look at removing the intake manifold soon (this weekend or on Friday) - but before that I can ask my neighbor or hubby to re-record the engine while I rev up the RPMs (redo the video for you).

You know, it has sounded a bit wonky since I had them work on it so I am changing the oil out right now (since I don't know what they used). There may be a hose loose too. I found the hose to the brake booster vacuum pump (located in the left section of the engine near the radiator as you face the engine bay) disconnected right after I brought it home, so I was not happy about that oversight, especially given its obvious location.

Time for a new mechanic...