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A4 B7 2.0 TFSi - DV Noise

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Danny-boy, Aug 18, 2013.

  1. Danny-boy
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    Danny-boy Member

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    Hi all,

    Since I bought my car, I noticed what I assume to be a noisy diverter valve.

    Assumed it was split, so changed to a rev D. Power jumped hugely, but the noise is still apparent.

    The noise in question is a fast ticking / whirring noise when revs are dropping. It happens when driving and stationary, and is only audible with the windows down.

    I have just fitted a BSR Optiflow induction kit, and the sound is still rather annoying - more apparent today as I was testing the BSR with the windows down.

    Questions........

    1. From what I have read, the noise is normal. Anybody else experience this?

    2. Would an aftermarket DV sort this out? If so, which one?

    I'm not after a loud dump valve or anything like that, the more silent the better.

    Cheers

    Dan
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  2. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep

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    the 2.0fsit can sound derv like
    but then again ot could be the chain makeing the noise

    i had a ticking on mine for ages changed loads of parts ended up been the inlet mani.
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  3. Molnboman
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    Molnboman Well-Known Member

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    Am wae Bez on this....the 2.0t engine are noisey f#ckers!...am pretty sure a new DV wouldn't cure any rattle as such. Probably hear the rattles more as a result of you fitting the induction kit too. Can you upload a YT clip....and I can compare it to my rattler for reference if you like.

    Cheers
    A
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  4. Danny-boy
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    Danny-boy Member

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    Hi gents, thanks for the responses.

    I'm not sure how to post up a soundclip, I just recorded it with my iphone and it's in an M4a format.

    I can email it if you PM me your email address.

    Sorry to be a pain.

    Dan
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  5. Danny-boy
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    Danny-boy Member

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  6. Molnboman
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    Molnboman Well-Known Member

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    Listened to your sound clip Danny and my car never sounded like that with it's knackered DV. Sorry I can't give you anymore than that. Perhaps someone else will be able to help with this one.

    Good Luck
    A
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  7. Danny-boy
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    Danny-boy Member

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    Thanks Molnboman, appreciate you taking a listen.

    It's been like that since I bought it 9 months ago, so I'd like to get to the bottom of it and solve it if possible.

    I changed the DV about 8 weeks ago and the noise didn't change, so I'm not surprised its not DV related.

    Thanks again.

    Anybody else have a view?
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  8. Craig Cull
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    Craig Cull Well-Known Member

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    hi Danny, just to confirm really that mine never sounded like that either. But to me it sounds more like chain slap of some sort. I would be tempted to get the chain and tensioner done sooner rather than later. Sounds like the tensioner isn't taking up the slack. All I found with the bsr Optiflow was just more intake sound. Nothing like the sound lip I've just played. It's worth getting it done just to illiminate it from any enquiries.
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  9. Danny-boy
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    Danny-boy Member

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    Cam chain?
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  10. Craig Cull
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    Craig Cull Well-Known Member

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    gonna text you now mate
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  11. Danny-boy
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    Danny-boy Member

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    Cheers Craig, appreciate our discussion.

    Anybody else agree with cam chain slap?
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  12. Danny-boy
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    Danny-boy Member

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    How much did it cost you buddy?

    My noise is only when revs are on the way down, not all the time.
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  13. Molnboman
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    Molnboman Well-Known Member

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    Can I chuck in my tuppence worth again.....I didn't look at your earlier posts...was the sound there before the open filter?....Cause to me it just sounds like an engine with an open air flow. My Saab Aero had a BSR optiflow fitted and the engine sounded just like that.

    BR
    A
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  14. Danny-boy
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    Danny-boy Member

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    Hi, yes the sound was there before the BSR, and it's still the same.

    The only reason I mentioned it was because I was driving with the window down to hear what the BSR sounded like which made the noise more obvious.

    Having done more reading, I'm not the first to have this sound. Others have had it exactly the same.

    Their conclusion was wastegate actuator rod or N75 valve. In the case of the WAR, it's fixed by a new turbo!!!
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  15. Molnboman
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    Molnboman Well-Known Member

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    Oh, ok Danny.....but a Turbo as a fix.....Jaysus, you wanna make sure that's gonna fix it.....but saying that, it's not the most expensive part to buy or fix in the big scheme of things....but it does take up a good few beer tokens!

    Good Luck,
    A
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  16. Craig Cull
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    Craig Cull Well-Known Member

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    To be fair mine also still sounds like a diesel, but that's just the nature of the engine. It quietened down by 30% with the new chain and tensioner.
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  17. bowen
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    bowen Member

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    Did you ever get this fixed Danny?
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