[A4] Suction/Purge Valve and oil smells/leaks?

Derek Pulvino dbpulvino at hotmail.com
Wed Jul 18 17:11:11 EDT 2007

Reading through stuff at Audiworld, it appears it's a pretty common problem. 
  Mechanism would be PCV system getting blocked creating excessive pressure 
in the engine (crankcase/head/etc).  The seals seems to be the weak link 
where this pressure is vented from...leading to pressure venting co-mingled 
with oil.

While the seals can become more permanently damaged, many seem to have found 
freeing up the vent system stops the oil leaks.  I'd give a link to what I 
was looking at, but Audiworlds web addresses aren't set up for easy linking. 
  I did a search of the 30vV6 forum using "suction pump" as the search term.

Anyhow, getting ready to order the part from SJM.

Derek P

>From: "Richard Hurt" <rnhurt at gmail.com>
>To: "Derek Pulvino" <dbpulvino at hotmail.com>, "A4 Mailing List" 
><a4 at audifans.com>
>Subject: Re: [A4] Suction/Purge Valve and oil smells/leaks?
>Date: Wed, 18 Jul 2007 15:34:22 -0400
>WOW!  I'm experiencing the same symptoms.  Please let me know if you get in
>there and find out that a clogged valve was the cause all this time.  I've
>been living with it because I can't find the leak and I can't afford to 
>it down.  :/
>My symptoms are:
>  - Oily windshield on the inside
>  - Burning smell after a hard drive (sometimes)
>  - Copious amounts of oil dripping off the pan and parts thereabout.
>The bad part is that I can't seem to find out where the oil is coming from.
>The block looks pretty clean and dry (at least what I can see) and the 
>camshaft seals were replaced with the timing belt.  It didn't seem to make
>any difference.
>  Richard
>On 7/18/07, Derek Pulvino <dbpulvino at hotmail.com> wrote:
>>Getting ready to replace one of the broken hard plastic cranckcase vent
>>lines on the V6 which will also wind up opening up some space near the
>>of the engine.  I've heard a rumor that the suction pump/purge valve, also
>>located in the back of the engine, can plug and lead to oil leaks via
>>positive pressure in the engine.  Also read that this can lead to an oil
>>burning smell in the cabin, which I get from time to time along with some
>>oil leaks off the front of the engine.
>>As I'm going to be working in that area, I was wondering what peoples
>>experience with this part may be and if the above story is more than
>>Was thinking about ordering the suction pump at the same time as my PCV
>>Derek P
>>A4 mailing list
>>A4 at audifans.com

More information about the A4 mailing list