Pcv/Breather hoses S4

B6/7 S4/RS4
#1

Hi from the UK, I’m new here and to B6 S4’s. So far I’m loving the V8 but having a little issue with smoke

The car is using a bit of oil, little leak on the rocker gaskets but it seemed to do it more after a bit of fast driving. Had a little bit of random smoke coming from it, panicked at first like you do owning an S4 but have managed to put it down to clogged pcv/breather pipes, same happened with the spider hose on my B5 S4
It’s not smoking enough or consistently to be the valve seals or scored bores (no smoke or anything with going up to 5-6krpm and then decel’ing)
It’s pretty much the same as in the vid on the topic posted the other day
http://audirevolution.net/forum/index.php?topic=3643.0

So I cleaned the 2 pipes coming from the rocker covers and they were pretty crudded up with sludge, swapped the pcv valve out and took it for a spin, zero smoke at all.
Whipped the pipes off again to see and noticed that the T piece they connect to had some sludge in it also

Couple of questions;
I know that from the T piece there’s another pipe that leads off down to the driver’s side of the engine but can’t see where, anyone know?

Also if I can’t clear the pipes out what are the part numbers for a new set of hoses and I’ll prob put a new suction jet on there too
Engine code is BBK

The rockers will be getting sealed on friday along with the oil check valves and jet swapping, valley pan gasket, oil filter o-rings and inlet flapper actuator and fitting put on

Thanks in advance

1 Like
#2

Welcome to the site. Your in the right place for the 4.2 V8

Not sure on the exact part your asking for. Maybe take a picture so we dont give you the wrong part number.

I would wait till you get the valve cover gaskets all sealed up and sorted out. The valve cover gaskets that leak tend to pull in air at high RPMs and that will cause the PCV system to be overwhelmed. So changing that should or fixing the gaskets and better sealing that off will help

#3

Thanks for the welcome and the post in the other thread for putting my mind at ease lol

The part/parts I’m after are the pipes/hoses that go from the engine to the PCV breather system.

There are one from each valve cover, these go into a T round the back of the engine, then there’s a pipe that goes from that to the left side of the engine, but I can’t see where abouts it goes to

Can’t wait to get all the little jobs done tbh as had the car a few weeks now and not really been able to enjoy it fully.

#4

When I get a break later today I will go look and see if I can find a part number on those hoses. I dont think I have ever seen a part number on them and I dont see why you couldnt use generic thick wall hose. as long as the hose wont suction shut under vac

#5

Thank you

I’ve searched high and low for the numbers but don’t seem to be able to find them. The one I did find I popped in goolge and it came up with an image of all the hose/pipe assembly, I can’t find the pic I found before now grrr

As you say though, it can’t be much different from any other thick hose and I could prob make my own. Like a lot of people do with the Spider Hose on the B5 S4

#6

Closest I can find to the pic at the min in this set up;
http://www.ebay.co.uk/itm/AUDI-S4-A4-Crankcase-Breather-Valve-Pipes-B6-B7-PEG-077103245-077-103-245-/262002425019?hash=item3d008fbcbb#ht_2381wt_1164

Thing is the pipe that’s missing from it, is the one I’m wondering which part of the engine it goes to :-\

#7

Not sure if I am understanding your question, but here are some diagrams of the component locations and flow grams. Here is the diagram of what I think youre asking about

http://audirevolution.net/forum/index.php?topic=3588.0

http://i48.photobucket.com/albums/f202/sewermonsterBW/A24-0681_zpsfuoy7xks.gif