Rattling after bpv install !!(longish)

[SSiNeDD]

so i get chipped 2day and i buy the bpv @ the same place, but i dont ask him 2 install it cause they about 2 close shop, so ive read around thats its an easy 30 min job, so i get home @ w/help from my cuz Sejo5 we put on the 710n but when i start it up and i rev it over 2000 rpms after i release throttle it rattles ( and that wasnt there before) its a steady idle though. so i tried takin out the ecu and re-lettin the throttle re-adjust like Evil-audi suggested 2 me, anyone else have any suggestion b4 i go bak 2mro 2 have the guy chek it out ? - i posted on the other board and all i got was "where is the noise coming from" =\ well 2 answer that its coming from Front slightly 2 the left* of the center of the engine, TIA

[EVIL-AUDI]

I didn't realize it was the rattle you were worried about. I thought it was more a rough idle. My TB adapt won't do much for you in that department

[Daft]

The noise is coming from the other side of the motor then. The BPV is on the passenger side so, the BPV isn't making the rattling. The only items on that side of the motor are belts and the throttle body. Check the throttle body area and make sure there are no cracks in any hoses or tubes. Check the belts (waterpump belt and serpentine belt) for cracking. Otherwise, you will need to give us more to work with than the noise itself. I'll wager that a VAG computer could give you some ideas as to why the idle is sketchy. Maybe a vacuum leak, you were dealing with vacuum lines when the BPV was installed. Take a look at the vacuum line that goes from the intake manifold to the BPV for cracks too. They get very brittle when they age and the BPV install requies that you tug on that line quite a bit.

[SSiNeDD]

Je the tb adapt didnt fix(thnx tho evil)
so i went 2 test the car out las nite pulls like wow now
and then somethin gave soundin like somethenin blew up car had a rough idle and jus woudnt go ! so we pushed the car bak and this hose had come off (in pic below) put the hose bak on and cars movin and seems ok nowbut the rattling still there =\

[Daft]

That'll do it. That's the intercooler-to-throttle body hose. No hose, no intake air gets to the motor.

How's it running now?

[SSiNeDD]

the car is runing good, but the rattling still there, and the noise is comin from same side of the bpv ( i tried 2 fix the error on original post but it wont change =\)

[Rieger_RS4]

if it's a rapid clicking chatter sound.............then i had this for about a year and still can't figure out how to get rid of it. And it only accurs when you let off the gas at over 2k in park or when roling.

[DDQ]

I know exactly the sound you're talking about. I had the same thing.

The real cause of that sound is the BPV. It just echo's and makes that noise. It's like a hiccup that repeats real fast. The reason it happens when you let off the gas is b/c that's when the BPV is doing it's job.

I would say it's one of the two: 1) You installed the BPV facing the wrong way, and boosted real real hard and ripped the rubber diapghram, or 2) The BPV was ripped to begin with. Was it brand new?

I'd try another BPV. You want to install it with the spring loaded end pointing into your IC piping. It will work both ways, but I've been told that it's more prone to tearing the other way.

[littlewhite]

Yes, u do not want that "S" rubber tube to come off lol ! I had that happened and was dead on the side of teh road with white smoke coming from the back

[SSiNeDD]

ok i got an update, so i went 2 the guy i bought the bpv from( who also installed my chip DDQ its the TAP chip stg3) so i describe whas hapenin and he goes i kno wha it is b4 he hears it, i pop the hood rev it up, and he goes its the wastegate from the turbo, says its not gona last long =\ (the turbo that is) i say it wasnt doin this b4 i installed the bpv it was fine with jus the chip,
so i really hope its not he turbo and im gonna try get a new clip for the bpv the side with the nipple i reused the one ur suppostu cut of, i just wiggled it off and widened it and hopefully aqueezed it bak on, but i reved it and had my finger on that niplpe hose n didnt seem like it was blowin air anywhere there, ill try 2 reinstall the stok bpv bak on n see if its still doin this and try 2 get anotehr clip for that nipple hose , the otehr ones are real tight i made sure of that. =\ keep the thoughts comin and related issues uve had also.. TIA

[DDQ]

Originally posted by SSiNeDD
ok i got an update, so i went 2 the guy i bought the bpv from( who also installed my chip DDQ its the TAP chip stg3) so i describe whas hapenin and he goes i kno wha it is b4 he hears it, i pop the hood rev it up, and he goes its the wastegate from the turbo, says its not gona last long =\ (the turbo that is) i say it wasnt doin this b4 i installed the bpv it was fine with jus the chip,
so i really hope its not he turbo and im gonna try get a new clip for the bpv the side with the nipple i reused the one ur suppostu cut of, i just wiggled it off and widened it and hopefully aqueezed it bak on, but i reved it and had my finger on that niplpe hose n didnt seem like it was blowin air anywhere there, ill try 2 reinstall the stok bpv bak on n see if its still doin this and try 2 get anotehr clip for that nipple hose , the otehr ones are real tight i made sure of that. =\ keep the thoughts comin and related issues uve had also.. TIA

I can almost guarantee you that it's not the wastegate. Please read my post above explaining it.

This is a very common problem. I've read countless posts over the years with the same noise, and it's always turned out to be the BPV.

Just try flipping the BPV around and see if that works.

And I wouldn't recommend revving it with the vac line detached. You also probably won't feel air blowing much out of that nipple hole.

[JMG]

pick up a 710N for $30 and try it out. If the sound goes away then you know it was the BPV. If it doesn't then you now have a spare BPV that does the job just fine for chipped cars 1.2 bar and lower.

[SSiNeDD]

jmg it is a 710n that i installed, it loooked new 2 me i was in plastic bag n brown box when i t was given 2 me =\

[DDQ]

SSiNeDD - again, make sure you install the BPV in the proper fashion. Any BPV may be installed one way or the other. Many versions are better to run reverse of the stock position. With the 710N, you want the spring loaded end facing the IC piping. They have a rubber diaphram inside. If you were running the TAP Stage 3 and boosting like crazy, and the BPV was installed the wrong way, then you may have ripped the diaphram.

Also, make sure you had the 710N. The stock valve is also part number ending in 710, but without the "N". Many mix them up.


Do you have the TAP sport K03 turbo? If not, why are you running the Stage 3 software?

[SSiNeDD]

ok i tried switchin the bpv around and its doing the same thing!
i dont kno whats the IC piping,(easiest way 2 explain it ) i have it set now so the hole with the nipple is facing up @ the sky, before it was pointed @ the left wheels i hope that hepls either way tis makin the noise, "ripped the diaphram" ? on teh bpv ?
and yes its got the 710n printed on the bpv and no sport ko3
jus got the chip for cheap and seemed like somethin 2 build around with, =\

[SSiNeDD]

can any1 post a pic of how it should look ?

[DDQ]

I have a '97, which is a different configuration.

So, I can't really explain which way the nipple should point.

Easiest way to tell: There's two larger diameter tubes running into the BPV, along with the thin vacuum line. One of the larger diameter tubes is runs up to the air box, the other runs into the intercooler (IC) piping.

Take out the BPV. Push your finger into the holes, and you can easily tell which end is the spring loaded end. That's the end that you want to point into the IC piping.

But, I still think you have a ripped diaphram in your BPV. I think that the chip you're running runs too much boost, and would tear the rubber diaphram inside the 710N. (Which means, throw it in the garbage, it's toast.)

I do not think you should run that software on the stock K03. The Sport K03 is designed to handle more boost. You may burn out your stock turbo with that software. The TAP Stage 3 is programmed for a Sport K03 turbo.

Do you have a boost gauge? You're probaby running too much boost. That is also why you probably blew off the Throttle Body hose. In all honesty, I do not think anyone should bother modding unless they get a boost gauge. It should be the first "mod" anyone does to their turbo car.

[SSiNeDD]

je ur rite DDQ, the chip really dont belong on w/o the biger turbo
im gonna have 2 get anotehr bpv n test it out, i prob did blow the diaphram, should i get another 710N or somethin else ? and im im not about 2 take this chip out ill just ride it slo now i wont push on it , and maybe down the line ill upgrade 2 a k04 or somethin else but till then im sure this will hold on rite ?
any suggestions apreciated TIA

[DDQ]

You can try running that chip, but I'd get a boost gauge to make sure you're not overboosting. You could also throw yourself into limp mode.

I'd try another 710N BPV. It's the cheapest solution to diagnose your problem.

That program is not for a K04, or a bigger turbo. It's just made for the Sport K03, which is in later models and I also think it's in the newer TT coupe (but the TT turbo does not fit A4s.) It's still a K03, but I think it has different internals that are designed to flow more, and can handle higher boost levels without turbine wobbling.

[Rieger_RS4]

I have a forge and it does that. so it's not the bpv. i was also told by the dealer and mechanich that it could be the exhaust side of the turbo or the wastegate. I know for sure it's not the valve as it did it and still does with 710, 710n, TurboXS BOV, TurboXS BPV, and Forge. So really i don't think it the valve. i still get the same boost a year later, so really it's not taking away any performance.........at least yet!

[SSiNeDD]

Rieger do u push on it ? cause im very hesitant 2 push on the car now since the intercooler-to-throttle body hose poped off, =\

[DDQ]

Originally posted by Rieger_RS4
I have a forge and it does that. so it's not the bpv. i was also told by the dealer and mechanich that it could be the exhaust side of the turbo or the wastegate. I know for sure it's not the valve as it did it and still does with 710, 710n, TurboXS BOV, TurboXS BPV, and Forge. So really i don't think it the valve. i still get the same boost a year later, so really it's not taking away any performance.........at least yet!

Rieger:

1) Are you running a cone intake? (an open intake will further amplify the sound of this issue)

2) Which valve do you have installed now?

3) Which direction did you install it?

Even with aftermarket valves these symptoms can occur. The internals can wear out and cause the fluttering which causes the noise you hear.

See this thread: http://www.audizine.com/forum/showth...threadid=14159


"As stated in Audi’s technical bulletin dated Dec. 8, 2000 the bypass valves should be replaced should the following occur: “Groaning or howling noise from engine compartment when accelerating during partial load between 2500-3000 RPM,” or “ Rattling noise when decelerating between 2000-3000 RPM,” which “may be caused by the internal diaphragm of the charge pressure bypass valve producing pulsating noises.”