1.4 BHC - Stubborn engine related noise ...

So after giving a lot of though for the source of the rattle, I have decided to remove the oil filter and I took a very close look into it - as I guess that there would be some metal shavings there if this sound is coming from the engine.

In short words - I found nothing wrong with the filer (nothing there apart from a single long hair [for which I have no explanation]).

Took the bottom cover off and tried to find anything loose (including the driveshaft thermal cover) - but all seem to be fine, with no rattle at idle.
 
Bordos said:
So after giving a lot of though for the source of the rattle, I have decided to remove the oil filter and I took a very close look into it - as I guess that there would be some metal shavings there if this sound is coming from the engine.

In short words - I found nothing wrong with the filer (nothing there apart from a single long hair [for which I have no explanation]).

Took the bottom cover off and tried to find anything loose (including the driveshaft thermal cover) - but all seem to be fine, with no rattle at idle.
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I already did check all that before with same result. This noise is definitely not related to the engine itself but I'm pretty sure it's clutch. It's either the dying bearing from clutch dust, springs or hopefully not bolts and rivets which holds the pressure plate. How old is your clutch or did you ever replaced it?
 
bix said:
I already did check all that before with same result. This noise is definitely not related to the engine itself but I'm pretty sure it's clutch. It's either the dying bearing from clutch dust, springs or hopefully not bolts and rivets which holds the pressure plate. How old is your clutch or did you ever replaced it?
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There is a good chance that my clutch is still the factory one ...
But aside from the rattle, it is working perfectly fine...
 
Had an annoying rattle on one of my tdis, similar symptoms to yours. turned out to be drop link. Worth a check.
 
Bordos said:
There is a good chance that my clutch is still the factory one ...
But aside from the rattle, it is working perfectly fine...
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Same I scan the car regulary with VCDS and no codes no issues whatsoever drove 100 miles yesterday no problem at all while over 2000 rpm as soo as you let go it comes. Will let you know how things changed when I swap the clutch next month when the weather get hopefully bit better around here.
 
bix said:
Same I scan the car regulary with VCDS and no codes no issues whatsoever drove 100 miles yesterday no problem at all while over 2000 rpm as soo as you let go it comes. Will let you know how things changed when I swap the clutch next month when the weather get hopefully bit better around here.
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I will be looking forward for your feedback :)

Yep - I scan my A2 with VCDS from time to time - no fault codes (engine related)...
 
The rattle is here between 1500-1900 rpm - this is with the clutch pressed.

It’s never there above 2000 rpm and below 1400. Not there on idle …

(Just did a 2600 km trip to the Netherlands and back)
 
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I had a similar noise problem but on a tdi a few years ago. It turned out to be a fuel pipe vibration. I bought a new one from Audi and WOM fitted it which cured the the problem. If i remember correctly the one fitted, which was causing the noise, had one cylindrical shaped noise suppressant "baffle" in the fuel line and the new one had two. I,m not sure if its of any help but thought it worth a mention. This fuel line runs down the left side of the engine when viewed from the front.
 
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Dave M said:
I had a similar noise problem but on a tdi a few years ago. It turned out to be a fuel pipe vibration. I bought a new one from Audi and WOM fitted it which cured the the problem. If i remember correctly the one fitted, which was causing the noise, had one cylindrical shaped noise suppressant "baffle" in the fuel line and the new one had two. I,m not sure if its of any help but thought it worth a mention. This fuel line runs down the left side of the engine when viewed from the front.
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I seen other posts regarding this one - In your case this line with dumpers was broken or was is not the proper one in the car ?
I am asking as this hose is not a cheap one :(
 
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You are tight about the fuel pipe not being cheap. I dont know why it fixed the vibration noise but the original diagnosis was made by Stealth Racing garage in the UK......perhaps worth an email to them. 🤔
 
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Dave M said:
You are tight about the fuel pipe not being cheap. I dont know why it fixed the vibration noise but the original diagnosis was made by Stealth Racing garage in the UK.
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so, my vibration is back, will check droplinks are tight later. wondering about the fuel line possibility. did your noise disappear after a bit of driving, ie was it worst at start up / first few minutes of driving? in my case its related to engine revs, clutch in / out makes no difference. cheers nod
 
It was there all the time regardless Nod at around 1500 rpm. No noise heard above or below that rev range regardless of clutch depression etc. It was odd that the fuel line baffle appeared to "tune into" that particular parameter.
 
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Sounds like a resonant frequency to me. A bit like exhaust boom that some cars used to have at certain speeds (I think they're better tuned these days). Adding the extra damper would have changed the frequency at which the pipe resonated/knocked against the things around it, hopefully so it was out of the useable rev range, or at least couldn't be heard amongst other noises.
 
If you look at part number 19 in this diagram it stipulates some form of noise insulation incorporating the cylindrical baffle....i think i bought something similar with a double baffle which may have been an upgraded Audi part.....

Fuel line; fuel cooler; F 8Z-3-000 001>> Audi A2 (A2) 2004 year Audi EUROPA 201027

fuel line<br/>fuel cooler<br/>F 8Z-3-000 001>> Audi A2 (A2) 2004 year Audi EUROPA 201027 spare parts
audi.7zap.com audi.7zap.com
 
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I have to give it a good thing-through as this pipe is 10% of the car value ...
And as my car has the pipe with two baffles on it, one one those must have failed and the noise is there as the result of this failure ...

This is the pipe in question - 8Z0130308G
1713953430706.png
 
This is the thread which relates to Stealths conclusion and where i found the info to solve the problem....keep scrolling down.......

Gearbox fault

Sorry i missed this @Bordos but at least the solution to the noise/vibration issue is here on this thread.
www.a2oc.net www.a2oc.net
 
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