Oil blow-by around breather hose... problem??

NoahD · 01-21-2006, 12:05 PM

I just replaced my BPVs (they're a couple years old) and noticed a lot of residue around the breather connector.

Why would this be happening, and does it look like a problem?

2000SForce · 01-21-2006, 12:08 PM

kiNGMak.:.OEM · 01-21-2006, 12:09 PM

crew219 · 01-21-2006, 12:17 PM

Pull off that hose and you'll see that there's an o-ring on the plastic coupler . . . No reason why you can't just pull the old one off and slap on a fresh one.

Dave

NoahD · 01-21-2006, 12:40 PM

periodically:

mixture too lean DTC

evap emissions purge valve incorrect flow

I can't get my catalyst readiness code to set

Enigmagic · 01-21-2006, 01:00 PM

LCP · 01-21-2006, 02:16 PM

BiturboBoy_V2.0_S3-- · 01-21-2006, 02:47 PM

its the one that likes to crack after a while. pretty sure this could be your problem. you will end up dumping boost pressure into your evap system.

JBear::FATS · 01-21-2006, 03:03 PM

looks excessive. Could replace the o-ring. I would do what other had suggested. Wipe it clean and keep an eye on it.

NoahD · 01-21-2006, 03:03 PM

01-21-2006, 12:05 PM	#1
NoahD AudiWorld Senior Member Account #: 21756 Join Date: Jun 2001 Posts: 2,540	Oil blow-by around breather hose... problem?? I just replaced my BPVs (they're a couple years old) and noticed a lot of residue around the breather connector. Why would this be happening, and does it look like a problem? __________________ -- Noah Daniels Director & Instructor North Atlantic Chapter Audi Club North America

01-21-2006, 12:08 PM	#2
2000SForce Senior Member Account #: 80402 Join Date: Aug 2004 Posts: 7,934	tracking

01-21-2006, 12:09 PM	#3
kiNGMak.:.OEM AudiWorld Senior Member Account #: 87076 Join Date: Jan 2005 Posts: 3,485	i think it is some what common.. i dunno if it a problem or not though __________________

01-21-2006, 12:17 PM	#4
crew219 Member Account #: 74688 Join Date: May 2004 Posts: 4,924	Probably a cracked or dried o-ring. Pull off that hose and you'll see that there's an o-ring on the plastic coupler . . . No reason why you can't just pull the old one off and slap on a fresh one. Dave __________________ tyranny and anarchy are never far apart

01-21-2006, 12:40 PM	#5
NoahD AudiWorld Senior Member Account #: 21756 Join Date: Jun 2001 Posts: 2,540	Thanks! Is this blow-by likely to be causing some of my problems? periodically: mixture too lean DTC evap emissions purge valve incorrect flow I can't get my catalyst readiness code to set __________________ -- Noah Daniels Director & Instructor North Atlantic Chapter Audi Club North America

01-21-2006, 01:00 PM	#6
Enigmagic Member Account #: 25541 Join Date: Sep 2001 Posts: 3,114	doubtful, what are you lftf's? __________________ 2001.5 s4 nogaro avant. motor rebuild in progress

01-21-2006, 02:16 PM	#7
LCP AudiWorld Expert Account #: 125 Join Date: Mar 2000 Posts: 26,557	Clean it off and see if you can tell how quickly it again gets dirty and from where. __________________ "I can't stop apexing" 2000 S4 :: Nogaro Blue :: 6-spd :: AWE RSK04 :: AP Racing 13" 4-pots STaSIS Tracksports 550f/600r + 19mm rear sway bar :: APR Bipipe RS4 ICs :: Forge BPVs :: Autospeed DPs :: Borla :: Aquamist 1s UUC 40% short shifter w/spacer mod :: AWE center vent boost guage Lightweight flywheel :: 18x8 Ronal LZ's :: 235/40-18 Toyo T1R's 2002 allroad :: Atlas Grey :: Tip :: 245/50-17 Dunlop SP5000's Looking for tires? See My review of all of the tires I've had on my S4 Need info? See Everything anyone needs to know about their S4 Help our troops protect their heads: Donate to Operation Helmet Rest In Peace Matthew Ammon a/k/a O.W. Kenobi. May the Force be with you as you keep on apexing. Read his funniest post here.

01-21-2006, 02:47 PM	#8
BiturboBoy_V2.0_S3-- Elder Member Account #: 13456 Join Date: Dec 2000 Posts: 12,499	umm...make sure your 3 way check valve is installed in teh correct orientation its the one that likes to crack after a while. pretty sure this could be your problem. you will end up dumping boost pressure into your evap system. __________________ AWESOME post, funny and informative for newbs...its not all right but i suggest you click!

01-21-2006, 03:03 PM	#9
JBear::FATS Senior Member Account #: 9725 Join Date: Sep 2000 Posts: 4,427	In my experience it is not unusual to get some buildup in that area, that looks excessive. Could replace the o-ring. I would do what other had suggested. Wipe it clean and keep an eye on it. __________________ ________________________________________ 2001 S4 6-Speed Santorin Engine/Drivetrain: ASP Custom Tuned Stage III Fueling, RS4 Y-Pipe/Clutch/Fuel Pump/IC's, X1 Intake, Samco F-Hose, APR Bi-Pipe, Piggie Pipes, Miltek Single, AWE DTS, APR Snub, TG SS, VAST Water/Meth Kit. Suspension/Brakes: Vogtland GT, Neuspeed Rear Swaybar (Med), Stoptech 332 BBK. Exterior: 18" BBS CH, M3 Lip Spoiler, SPP Foglight Bulbs, RS4 Grill, E-Codes. Interior: UUC Alcantata Boot, TwinData EFU, Strat S4 Logo Floor Mats, HW V1, PhatBox.

01-21-2006, 03:03 PM	#10
NoahD AudiWorld Senior Member Account #: 21756 Join Date: Jun 2001 Posts: 2,540	will check and get back to you. Beautiful car, btw ;-) __________________ -- Noah Daniels Director & Instructor North Atlantic Chapter Audi Club North America

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