PCV Delete, Catch can or leave alone? (S3 8P 2006)

Daveyonthemove

Daveyonthemove

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I think I have diagnosed a split breather pipe from the PCV, so I have ordered both from TPS for approx £42.
This is obviously an easy job and will hopefully prevent the oil misting issue I have, but it's got me thinking that maybe I should remove it altogether for a little extra cash?

I don't fully know the benefits of a PCV delete or catch can installation, so any advice is gratefully received.
Any tried and tested products at a sensible price are considered.
 
Catch can is definitely worth it. I clean mine every 3-4 weeks and its amazing to see how much it actually "catches".
 
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@Daveyonthemove I have the pcv delete done but not the catch can so not sure if I am losing loads off oil or not but car seems to run fine
 
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Some people find that the pcv delete causes a smokey exhaust and have gone back to the latest standard revision which I think ends in R at the moment.
 
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That's good to know.
I'll do some research on the revised PCV and see if it's a better solution.
 
Just fit a revised PCV unless you track the car a lot. Even Alex admits that a catch can doesn't prevent the carbon build-up issues.
 
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I have made an offer on one for sale on ebay from Cardiff Audi, but they are yet to decline or accept it.
 
I haven't heard off any revised PCV but have heard off people taken away GFB+ and putting back a revised DV which is G if I mind .
 
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I got rid of my GFB+ and have the revision G fitted as i suspected the GFB+ was the cause of the oil misting on the engine cover, but it isn't.
 
Yes, I have one on order, should arrive tomorrow.
I should add that mine is operating OK, but I don't know it's history and as the breather pipes have seen better days, I'll replace the whole lot so I know they are good for a few more years.
 
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Revised PCV arrived yesterday and Breather pipes were collected from TPS.
On visual inspection there are a couple of obvious differences between the PCV's and probably some internal ones I don't know/understand.
I was able to remove the small breather hose which is the one that seems to always be coated in oil and nearest the engine cover, and on inspection it looks like it has a hairline split. That was simple to replace so I'm hoping the oil misting issue in the engine bay will now be fixed.
The larger breather hose is connected in an area I can't see or get to so I'm leaving it alone as it's doesn't seem to be damaged anyway.
Pics attached of Old Vs New PCV for anyone who is interested. New PCV is circled in red.
 

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Daveyonthemove said:
With the delete, where is the pressure going to?
Is it vented to air, or recirculated?
Click to expand...
the pcv system has two outlets, one in the front going to the intake manifold, and one in the rear going to the turbo.
when you do the 'pcv delete' it just blocks the front outlet, rerouting it to the rear only.

but if you're concerning about 'the oil getting into your intake manifold and valves, causing carbon build up', you should go for the catch can. Because even with the blocking front plate, the oil will go to the turbo, intercooler hoses, intercooler, manifold and valves.

the catch can, does the same as blocking, and only having the rear outlet available, but before the pressure going out it goes through the catch can, and saving all the oil getting everywhere in the route.
 

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fernando young said:
the pcv system has two outlets, one in the front going to the intake manifold, and one in the rear going to the turbo.
when you do the 'pcv delete' it just blocks the front outlet, rerouting it to the rear only.

but if you're concerning about 'the oil getting into your intake manifold and valves, causing carbon build up', you should go for the catch can. Because even with the blocking front plate, the oil will go to the turbo, intercooler hoses, intercooler, manifold and valves.

the catch can, does the same as blocking, and only having the rear outlet available, but before the pressure going out it goes through the catch can, and saving all the oil getting everywhere in the route.
Click to expand...
Cheers for the in depth explaination
 
Daveyonthemove said:
Revised PCV arrived yesterday and Breather pipes were collected from TPS.
On visual inspection there are a couple of obvious differences between the PCV's and probably some internal ones I don't know/understand.
I was able to remove the small breather hose which is the one that seems to always be coated in oil and nearest the engine cover, and on inspection it looks like it has a hairline split. That was simple to replace so I'm hoping the oil misting issue in the engine bay will now be fixed.
The larger breather hose is connected in an area I can't see or get to so I'm leaving it alone as it's doesn't seem to be damaged anyway.
Pics attached of Old Vs New PCV for anyone who is interested. New PCV is circled in red.
Click to expand...
Did you noticed that there should be a new gasket with the Pcv
 
ch1z64 said:
Did you noticed that there should be a new gasket with the Pcv
Click to expand...
I looked at the gasket and they are identical as they aren't fitted to the PCV side of things, so the PCV fits onto the existing plate and gasket.
Mine was fine and after screwing it on tight and testing it the car ticks over and revs perfectly, as it did previously.
 
Daveyonthemove said:
I looked at the gasket and they are identical as they aren't fitted to the PCV side of things, so the PCV fits onto the existing plate and gasket.
Mine was fine and after screwing it on tight and testing it the car ticks over and revs perfectly, as it did previously.
Click to expand...
Excellent, but you are meant to change the gasket
 
fernando young said:
the pcv system has two outlets, one in the front going to the intake manifold, and one in the rear going to the turbo.
when you do the 'pcv delete' it just blocks the front outlet, rerouting it to the rear only.

but if you're concerning about 'the oil getting into your intake manifold and valves, causing carbon build up', you should go for the catch can. Because even with the blocking front plate, the oil will go to the turbo, intercooler hoses, intercooler, manifold and valves.

the catch can, does the same as blocking, and only having the rear outlet available, but before the pressure going out it goes through the catch can, and saving all the oil getting everywhere in the route.
Click to expand...

Nicely put. I always wondered if a PCV delete is a good trade off instead of a catch can?
Something like this https://x8r.co.uk/products/audi/aud...ve-delete-removal-bypass-plate-repair-kit-fix
 
If the gasket/seal is the same, and the existing one is working and not perished then I don't see the point in paying £20+ for a new one.
If it had been on it's way out it would have been replaced, no question about it.
 
Daveyonthemove said:
If the gasket/seal is the same, and the existing one is working and not perished then I don't see the point in paying £20+ for a new one.
If it had been on it's way out it would have been replaced, no question about it.
Click to expand...
Did you not get a new gasket with the new Pcv
 
No, I bought one without as I new the seal was ok. Like I said, the seal/gasket is an additional £20+ and it wasn't needed.
 
So Davey do you have a catch can installed?
 
audis3UK, did you solve the ticking sound at RPM under 1000??
 
jjjoe said:
audis3UK, did you solve the ticking sound at RPM under 1000??
Click to expand...
Yes I did the issue turned out to just be a rattling pipe coming from the fuel pump, stuffed some foam into the gap and all fixed now ☺
 
audis3UK said:
Yes I did the issue turned out to just be a rattling pipe coming from the fuel pump, stuffed some foam into the gap and all fixed now
Click to expand...
Lol curious to know how you arrived at finding that would've have never even noticed that

Sent from my SM-N960F using Tapatalk
 
I’m no genius, but found it trawling through hundreds of posts and various forums. I’d almost say it’s a common issue that isn’t written about as it’s so simple once found
 
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Last week, after an inspection with my friend on my S3 8P 2009, we have stuffed the fuel plastic duct, (where you can see two fuel pipes coming from pump), with foam spray, just a very small quantity. So the ticking noise at RPM under 1000 is disappeared. I say in advance that my car is all original, with manual gear. Since I bought it in 2014, it has the following issue: every time I use it when I start after 25 km/h you hear a loud and fast mechanical clutch(noise), but only first time a day. I mean, if I restart the car after 1 hour everything is ok. The day after the issue reappear fast and loud for a second. I’m a little worried, I love this car, I would like to keep it in good condition.
I really appreciate this forum and thank you so much to audis3UK.
 
Do you have the part numbers for the breather pipes? And out of interest roughly what did they cost?
 
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