A call to every 335i owner ...

[Moe]

If ur car is making a strange blow off valve sound at 3,000 rpm let me knw plz...(note: leave the accelerator at 4,000 rpm while stopping)
cuz i was at AGMC 2day and they think that it is not normal but i disagree..
i've tested 3 335s yet and they all have the same sound..! so anyone to support me here ?:grouphug: :grouphug:

[Ayham]

Why isn't it normal for the blow off valve to "vent"?? :rofl:

[Moe]

Why isn't normal for the blow off valve to "vent"?? :rofl:

lool dude i dunn think that the 335s got blow off valves, but the turbo should breath a bit n this thing sounds like a blow off valve. they Guys at AGMC think that it is not normal .. !!

[Ayham]

I still need to see a turbo system without a pressure-release device!!!

There has to be a BOV, but the stock ones are quite-ish. That's why you think it's never been there when a loud aftermarket one is installed. Research blow off valves; atmospheric and re-circulating.

[SewerSideUp]

Probably re-circulating on the N54. A re-circulating BOV doesn't release the pressure out into the atmosphere. Maby that's why they told you it's not normal to hear it, because it's not .

[Moe]

I still need to see a turbo system without a pressure-release device!!!

There has to be a BOV, but the stock ones are quite-ish. That's why you think it's never been there when a loud aftermarket one is installed. Research blow off valves; atmospheric and re-circulating.

i knw man but i meant that n54s got no loud Bov( i said that the turbo must breath out ) for me a BOV is the modification, for the stock i actually dunno its proper name !! and wuts up with the sarcastic replies !! ??

[Ayham]

I'm not sarcastic toward you bro, don't get me wrong.

I'm sarcastic to the technicians who according to my understanding, claimed there's no BOV on the N54. But now we've seen what causes the sound in your car yesterday and we know it's your turbo actuators.

[Moe]

I'm not sarcastic toward you bro, don't get me wrong.

I'm sarcastic to the technicians who according to my understanding, claimed there's no BOV on the N54. But now we've seen what causes the sound in your car yesterday and we know it's your turbo actuators.

Its ok ... My appointment is on sunday, i'll take the car to get my actuators replaced and get it reprogrammed. i hope that they do it ri8 this time cuz i miss my old 335i, this actuators thingy is reducing the power of my car.. !!
But i have to admit, i'm lovin the Sound looooool !!

[Ayham]

Well, there's always an aftermarket BOV waiting for you :D

Ofcourse, sound Vs. power and reliability (recirculating Vs. atmospheric)

[Moe]

Well, there's always an aftermarket BOV waiting for you :D

Ofcourse, sound Vs. power and reliability (recirculating Vs. atmospheric)

llooll placin a BOV will KILL the warranty.. !! so i'll sacrifice the sound and take my horses back :D

[RAFiK]

good luck bro !!

[CurseMan]

I have the same thing on my 335, when i release my legs from the throttle. I think its the wastegate that make mechanical weird whistle sound when I suddenly release my legs. on e92post they say a new software would solve the problem. I will change my oil in less than 10k and let them update the software and see if it will resolve the problem.

[Moe]

I have the same thing on my 335, when i release my legs from the throttle. I think its the wastegate that make mechanical weird whistle sound when I suddenly release my legs. on e92post they say a new software would solve the problem. I will change my oil in less than 10k and let them update the software and see if it will resolve the problem.

cool stuff...update me :D and i'll keep u updated

[Ehssan]

I had the same issue , very funny is it's been fixed by a software update ,, I have version 32 on my car and the knock is gone totally ... try to ask BMW to update your car's software ..

[Ehssan]

sorry I forgot to mention that it's the wastegate that does this strange knock , this issue was in version 29 and they have fixed it with the later versions ... there was a turbo lag as well in version 29 ..