Golf R Metallic Ringing Noise

[agentthumb]

Strange... That wastegate actuator rod issue was specific to the MK6 - from what I've heard, they haven't been applying this 'fix' to the MK7's because they'd fixed it from factory on the MK7. Very weird.

Tech said it applied to MK7 up to MY13s, they then fixed it by welding the problem area.

As my car is MY15, it had the welded rod. But seeing as we were pretty sure the noise was related to the wastegate operation, they'd replace the rod to see how we went. Failing that, they'd have to replace the actual gate itself.

I went to Cricks Highway at Springfield in Brisbane.

[andrew7]

100% the sound is gone, not even a hint of the sound since installing the downpipe. That is a definite fix.

If you dont want to replace your DP, you can see if an exhaust shop can wrap the flex joint with heatproof exhaust wrap. This will reduce (or stop entirely) the vibrating sound, as the metal cage around the flex joint wont be able to vibrate. Shouldn't cost you much more than $100.

Alternatively you can wait for VW to come up with a fix, but I seriously doubt they will fix this, given the fact that they'd have to redesign & replace or at least modify the downpipe to remove the cage or something. Neither of these options are a simple fix - it's highly unlikely that they will outlay that much investment for a 'small rattle' (in their opinion).

Getting back to your earlier post above Jon, I don't think it is the heat shroud rattling. To me it sounds like the waste gate rattling/vibrating (just watched this video : https://www.youtube.com/watch?v=AUimU2C2H8U ; to me the sound is exactly like when he manually opens the waste gate just multiplied by about 1,000!).

Assuming that you had the exact same rattle (metallic cymbal rattle sound at low RPM's the closest/best description I think) before your new aftermarket DP fixed it, could we theorise that an aftermarket DP creates better airflow/exhaust flow out of the turbo thus reducing the wastegate rattle on some of the Golf turbo's affected (does the wastegate now open more definitely under higher airflow thus not rattling)?

Before I leap in to an aftermarket DP (and of necessity thereafter a tune to adjust for the aftermarket DP as I understand it (?) (is an tune a necessity/will there be a CEL post installing an aftermarket DP??) and potential loss of drivetrain warranty I would like to be 100% sure it will be effective. Failing that I guess those of us with R's could push for wastegate/arm replacement and see if that helps?

Any/all input appreciated (desperate for a fix)!

[TFAD]

Getting back to your earlier post above Jon, I don't think it is the heat shroud rattling. To me it sounds like the waste gate rattling/vibrating (just watched this video : https://www.youtube.com/watch?v=AUimU2C2H8U ; to me the sound is exactly like when he manually opens the waste gate just multiplied by about 1,000!).

I've always thought the same about the noise I have.

Back to my service report it says:

"Unfavorable flow conditions in the turbocharger leads to a pinking noise. Carried out road test with customer & confirmed noise. Compared with same model vehicle & found noise to be the same. (note: I wasn't present for this) Checked & found TPI relating to customers statement. Found noise to be unfavorable flow conditions in the turbocharger which leads to a pinking noise. This noise is construction related and normal. There is no parts dam"

My noise is definitely audible from idle up to about 2500rpm, not the higher range mentioned by agentthumb. I think you might be onto something Andrew in that the DP isn't the source of the rattle but changing it changes the airflow in the turbo and eliminates the noise.

I'm going to drop into a dealer at random and test drive another R to see if it has the same noise.

[andrew7]

^ Agree, a bigger aftermarket DP should address the 'unfavourable airflow' in affected 7R's (Nb. Just the other day a vwgolf.net.au member reported elimination of the rattle with an aftermarket DP). And by the way, I'm in the fairly unique position of being on to my 3rd 7R (don't ask!), and I can categorically state that my previous 2 7R"s did not have the rattle.

My current plan is to install a CTS DP and simultaneously a JB1 tuning box to get elimination of the dreaded rattle and better performance 👍 (not keen on a ECU reflash tune at this stage, keen to keep the warranty)

[andrew7]

Bump on this issue, anyone making any progress on resolving this rattle of late?

[Primordial]

I've always thought the same about the noise I have.

Back to my service report it says:

"Unfavorable flow conditions in the turbocharger leads to a pinking noise. Carried out road test with customer & confirmed noise. Compared with same model vehicle & found noise to be the same. (note: I wasn't present for this) Checked & found TPI relating to customers statement. Found noise to be unfavorable flow conditions in the turbocharger which leads to a pinking noise. This noise is construction related and normal. There is no parts dam"

My noise is definitely audible from idle up to about 2500rpm, not the higher range mentioned by agentthumb. I think you might be onto something Andrew in that the DP isn't the source of the rattle but changing it changes the airflow in the turbo and eliminates the noise.

I'm going to drop into a dealer at random and test drive another R to see if it has the same noise.

I hope (for the sake of the guys who don't want to replace their DP) that the issue can be solved some other way.

I'm not sure if you've seen the video I posted up a while ago, but rattling the cage on the DP itself sounds remarkably similar to the vibrating sound that is caused at around 2500 rpm. As I can promise, removing that part fixes the issue. Kind of a smoking gun scenario isn't it? The whole "unfavourable flow conditions" sounds suspiciously like a dealer coming up with a wild guess at what the issue is. Even if they know what the issue is, they're up for 4-5 hours labour per vehicle, plus a newly designed downpipe (which currently doesn't exist!) to fix the issue. I can understand why they don't want to admit there's an issue!

[andrew7]

Thanks Jon for your input. Agree the aftermarket DP is the solution. I'm wrestling then with the need to tune the ECU to adjust for the aftermarket DP and consequent effect on drivetrain warranty. Unfortunately down Melbourne way there doesn't appear to be a mob such as Sydney's Hills Eurohaus offering the (comparative safety of) JB1 with DP option. Major option for me is a reputable/recommended workshop who offer the Revo Stage 2 tune and CTS DP, so think I'm about ready to pay them a visit

[Primordial]

That makes sense. Two quick pieces of advice - I've been having exhaust leak issues with my CTS DP. I'm not sure if it's just the way it's been installed, but it's taken a few visits to get it right. Thankfully the leak is down towards the mid-pipe section, so it's easily accessible, and doesnt require the subframe to be dropped! Anyway, if you can find a downpipe which is V-banded, or better yet, a custom single piece downpipe & midpipe, you'll avoid this issue. I'm not sure who the good exhaust places are down there, but the better ones should do a custom job for similar price to the CTS.

Secondly, the JB1 is a self-install job if your have a star bit for removing the undertray (bunnings), and a laptop. It's pretty easy to install yourself if you want to save yourself a hundred bucks.

[andrew7]

^ Thanks for that (disappointing to hear of the exhaust leaks). I'll check with VolksTech on this issue as I know they've installed a few CTS DP's so far. My only concern at this stage is the rattle not performance so could i get away with replacing the DP without needing a tune?

[Krauselet]

My gf and dealership both told me I was hearing things.... I'm so relieved this is a real noise!
I actually took my R back the dealership... stood with the techs and pointed it out and they said it was a normal turbo'd car sound -_-! Fkn bastards



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[lenny555]

I went to North Shore VW yesterday to have it looked and was told the mechanic took it for a drive and then took another R for a drive and they were both the same so assumed it was normal operating noise and to monitor it. Also there is no clip to change on the 2016 R?

Lenny

[andrew7]

Bloody hell the noise is spreading amongst MY16 R's! To repeat I had a MY14 7R with no such rattle so it is not a 'characteristic' of the engine/turbo; I wonder why it's becoming more prevalent?? I'm joining forces with another affected party down Melbourne way, we might end up trialling a replacement non-OEM DP on one of our R's and see if have a fix....(the clip which fixed the MK6 GTI wastegate rattle does not work on Mk7 R's)

[Der_Wolf]

Any responses from dealers or fix's for this issue? Does anyone know exactly what it is?

[Primordial]

Any responses from dealers or fix's for this issue? Does anyone know exactly what it is?

Easy fix - replace the downpipe with aftermarket. Me + one other has done this. It works! 2015 wolfsburg wagon rattle, who else?? - Page 2

[Dutch77]

Bloody hell the noise is spreading amongst MY16 R's! To repeat I had a MY14 7R with no such rattle so it is not a 'characteristic' of the engine/turbo; I wonder why it's becoming more prevalent?? I'm joining forces with another affected party down Melbourne way, we might end up trialling a replacement non-OEM DP on one of our R's and see if have a fix....(the clip which fixed the MK6 GTI wastegate rattle does not work on Mk7 R's)

I think I posted this earlier but cannot be bothered looking back.

The noise I believe you guys are having is also on the S3s - certainly based on the descriptions it is.

It is also very different to the Mk6 wastegate rattle both in sound and fix (which VW eventually acknowledged and fixed for free).

And for FWIW, I had the ringing sound on my Mk7 GTI as well..

Always on cold start, low revs, and it either tends to quieten down after operation OR my brain eventually tunes it out in anger.