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Author Subject: Metallic grinding noise
kit

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Post #1
Did a quick check of the engine bay, turned the ignition off and once the engine is off there is a metallic grinding/rubbing sound that slows down and stops, coming from somewhere around the block (I think in the right hand section but can't be sure). It lasts for about 2 and a half to 3 seconds.

I don't think it makes the noise when idling or accelerating, only when the iginition is turned off.

Any ideas what it could be!? Any help appreciated!!

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Posted 29th Mar 2010 at 01:48
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welshpug!

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Location: Bigend, Wales.

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Post #2
alternator, PAS pump, idler/tensioner bearing.

input shaft bearing, clutch release bearing.

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Posted 29th Mar 2010 at 01:52
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kit

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Post #3
Cheers mate. You can be useful when you're not hijacking threads regarding gearbox oil Razz

Are any of the above expensive/a pain to repair?

How serious could any of the above be?

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Posted 29th Mar 2010 at 01:57
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welshpug!

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Post #4
potentially very serious, depends which it is.

checked your box oil recently? Razz

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Posted 29th Mar 2010 at 01:59
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kit

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Post #5
I'll get it into a garage straight away. Seemed louder tonight than usual Sad

Just been serviced Wink

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Posted 29th Mar 2010 at 02:02
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welshpug!

Capt Pedantic

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Post #6
first thing I'd do is take the aux belt off and fire it up, should eliminate or pinpoint what area its coming from.

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Posted 29th Mar 2010 at 02:23
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kit

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Post #7
Just been outside to have another listen and it appears to be doing it when the engine is running too, although the sound isn't very noticeable, only when the engine is off and whatever is grinding slows down.

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Posted 29th Mar 2010 at 02:47
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adam b

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Post #8
Depressing the clutch make any difference?

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Posted 29th Mar 2010 at 03:06
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kit

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Post #9
Will check tomorrow mate and report back Smile

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Posted 29th Mar 2010 at 03:10
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matt.gti6

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Post #10
I have a similar noise from my engine, It sounds like its coming from the inlet manifold; its like a dry bearing/metallic noise, or a whooshing dry air sound. From looking around on here I found a mention of a a 'characteristic whirring sound from the intake manifold'...but I didn't know if this characteristic of the '6 in general, or characteristic of a fooked engine!
Posted 3rd Jun 2010 at 14:34
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kit

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Post #11
Forgot about this thread. If by 'characteristic sound' you mean normal then yes it is LOL

I've listened to three seperate 6 engines and they all make the same noise from the inlet. It was just me not noticing it before, hearing it then freaking out Doh

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Posted 3rd Jun 2010 at 14:43
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matt.gti6

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Post #12
That's exactly what I did, I noticed the noise for the first time after having the car for a year. I then panicked that I had a problem, glad to hear its 'normal', thanks for the advice
Posted 3rd Jun 2010 at 14:57
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306 lover ryan

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Post #13
The car I'm going to buy this weekend has, what I am sure is, this problem. Anyone else recognise it? Sounds like it's coming from th e inlet manifold

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Posted 15th Jan 2016 at 09:57
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stan_306gti6 Forum Admin

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Post #14
Yes, they all seem to make this noise - it's a characteristic of the way the inlet manifold is shaped I believe and generally sounds like a marble rolling around inside.

Nothing to worry about. Smile

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Posted 15th Jan 2016 at 10:03
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306 lover ryan

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Post #15
Thanks stan.

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Posted 15th Jan 2016 at 11:55
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mocinim

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Post #16
My rallye doesn't but my astor does the only differences are the rallye is ultra clean with a k&n filter standard box and the astor as yet unknown but presumed standard dirty

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Posted 15th Jan 2016 at 14:22
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craig903

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Post #17
Could be the clutch release bearing, does the noise change if the clutch pedal is pressed when you turn it off?

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Posted 15th Jan 2016 at 14:48
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306 lover ryan

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Post #18
Haven't bought it yet but will update when I do. Need a new exhast for it too. It's an abomination lol

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Posted 15th Jan 2016 at 17:20
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heliosphan

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Post #19
When you have the car in your possession and if the noise does concern you, make a good quality sound recording (a video file on your phone) for a useful length of time and showing differing speeds/loads on the engine. Upload the file to this or another thread and then people can help. Worded descriptions of noises are extremely unreliable whereas the microphone does not lie.
Posted 15th Jan 2016 at 18:01
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306 lover ryan

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Post #20
https://youtu.be/i3zai8Ypv6w

This is my car.
It is like a ball bearing rolling around and more noticeable when it turns off and runs down

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Platinum gti 6 now the daily driver...1 problem so far...fuel economy!
Posted 22nd Jan 2016 at 16:12
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306 lover ryan

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Post #21
Any thoughts?

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Posted 22nd Jan 2016 at 17:40
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roland rat

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Post #22
Standard gti6 sound to me mate
Posted 22nd Jan 2016 at 18:44
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mocinim

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Post #23
I agree sounds fairly standard to me also

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Posted 22nd Jan 2016 at 18:52
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stan_306gti6 Forum Admin

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Post #24
Yeah, that's the standard 'ball bearing rolling around noise'. Yes

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Posted 22nd Jan 2016 at 23:43
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phillipm

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Post #25
That would be the ball bearing I put in your intake.

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Posted 23rd Jan 2016 at 01:12
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