BPV ? (STFA and got seemingly conflicting answers) Are both openings (large ones) equivalent?
10-20-2005, 06:22 PM
#1
BPV ? (STFA and got seemingly conflicting answers) Are both openings (large ones) equivalent?
<center><img src="https://www.audiworld.com/tech/pics/eng30-install2.jpg"></center><p>
Just really noticed for the first time that the R and L BPV's on my engine are oriented differently. In donp's Tech article (see picture borrowed from that article), his are both oriented the same, but my left valve (one behind the dipstick) is oriented so the vacuum tube nipple is facing up, not towards the right BPV (I'm stock). Does it matter? I think it doesn't, but one of my valves was replaced under warranty - thus I have a 710A and a 710B. If my dealer knew something about Audi's, I wouldn't have this question.
Thanks for any info you can provide!!!
Just really noticed for the first time that the R and L BPV's on my engine are oriented differently. In donp's Tech article (see picture borrowed from that article), his are both oriented the same, but my left valve (one behind the dipstick) is oriented so the vacuum tube nipple is facing up, not towards the right BPV (I'm stock). Does it matter? I think it doesn't, but one of my valves was replaced under warranty - thus I have a 710A and a 710B. If my dealer knew something about Audi's, I wouldn't have this question.
Thanks for any info you can provide!!!
10-20-2005, 06:37 PM
#3
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Think popular opinion is to have them oriented parallel to the ground/ release side and vacuum
fitting parallel, pressure side pointing down.
<img src="http://pictureposter.audiworld.com/3027/almost_done.jpg">
Oriented like this keeps the boost pressure off the diaphram/spring until it is actuated. Reversed and you will likely get bleed/leaking around ~1.3-1.5B depending on valve revision/model.
<img src="http://pictureposter.audiworld.com/3027/almost_done.jpg">
Oriented like this keeps the boost pressure off the diaphram/spring until it is actuated. Reversed and you will likely get bleed/leaking around ~1.3-1.5B depending on valve revision/model.
10-20-2005, 06:48 PM
#7
So my one valve (behind dipstick) has the pressure side hooked up to the intake (low pressure) and
the release side hooked up to the pressurized (post turbo) pipe. Thus I am likely getting leaking of boost, thus robbing me of power - correct?
I need to change this around, in your opinion - right? Thanks, I'm pretty irritated right now (at my incompetent dealer) and wanting to make double sure before I change anything.
I need to change this around, in your opinion - right? Thanks, I'm pretty irritated right now (at my incompetent dealer) and wanting to make double sure before I change anything.
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10-20-2005, 07:03 PM
#9
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Wasn't too bad, was on the neighbors lift at the time(whew), just messy.
Pretty much break the axle bolt, jack the drivers front up(roll-on lift), pull wheel, pull axle shield, pop upper links out, pull axle, pull speed sensor, pull diff cover, rake out pos plastic tube, and re-assy. I hate "mistake" maintenance. Took just over 3hrs, wasn't too hard, just made me sick when it happened lol. Car runs like a lightening bolt now haha.
I'll get a pic up in a minute ;-)
I'll get a pic up in a minute ;-)