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

Derek Pulvino dbpulvino at hotmail.com
Sat Aug 18 16:38:47 EDT 2007


At long last finally getting around to replying on this.

I got the parts replaced a couple of weeks ago, but wanted to drive  
for a while and see if this fixed things.  The parts are easy enough  
to get to and replace.  Both purge valve and "green valve" are  
located on the back side of the engine, right beneath the assortment  
of vacuum hoses and what not.  The hardest part about the removal and  
replacement is cutting off the old crimp on clamps.  In all, once you  
get the parts (five hose clamps, I believe three #8 and two #6, and  
the two valves) the removal and replacement takes a max of about 45- 
minutes or so.  Also cleaned off the head and heat shield over the  
manifold after replacement.

When I took the old parts off, the "green" valve was fine, but the  
suction/purge valve was partially clogged. The part that comes off  
the valve at an angle wouldn't let any air through.

Since the replacement, I've driven probably 1000-miles and am yet to  
get that oil smell again, and haven't noticed oil leaks where I'd  
seen them before.  So if you have oil leak problems, I'd say give  
this a shot as it worked for me.

For photos, and a pretty good right up, I'd refer to the audiworld  


If you can follow that, the green valve is right below the suction  

While I'm not as sure, I think this may have helped my gas mileage a  
bit too.

Anyhow, hope this all helps.

Derek P

On Jul 18, 2007, at 12:34 PM, Richard Hurt wrote:

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 tear 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 front camshaft seals were replaced with the timing belt.  It  
didn't seem to make any difference.


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 back
of the engine.  I've heard a rumor that the suction pump/purge valve,  
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  
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 hard

Derek P

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