MK6 GTI - Rattle upon acceleration - Resolved via TPI: 2021062/7

[paulcito]

As mentioned earlier, my MY10 GTI had the engine acceleration rattle from day 1 - travelled 300kms.

[galtaforce]

Well I'm picking up tomorrow so I hope mines ok! Btw any 2010 builds with the rattle?? :/

Mine's a January 2010 build and has the rattle.

[Mk6 GTI]

Mine's a January 2010 build and has the rattle.

Well I picked it up sat and since i drove it out of the showroom it has had the rattle!

So whats happening with this? Anyone going to take some action with VWA?

Im trying to decide whether i mind it or not to be honest lol

[kennyc]

This is starting to freek me out now. When i test drove the GTI i did not hear any rattle noises.
But i think i will have it now, but either way if you pump up the radio can you still hear it? Cos that is what i will do if i have the noise!

[paulcito]

Interesting that the 'rattle' does not happen when not in gear ie rev in neutral 2-3k does not rattle - just a sweet engine sound.

Possibly caused by something in the drive train resonating or vibrating ?

[kennyc]

Interesting that the 'rattle' does not happen when not in gear ie rev in neutral 2-3k does not rattle - just a sweet engine sound.

Possibly caused by something in the drive train resonating or vibrating ?

So the rattle is only when you accelerate? If your in just say cc and not accelerating all the time you wont hear the rattle?

[paulcito]

So the rattle is only when you accelerate? If your in just say cc and not accelerating all the time you wont hear the rattle?

Yes.
No 'rattle' at all reving 2-3k - only when in gear - 100%.
It seems that it can't b the turbo waste gate given that there is no 'rattle' reving in neutral ?

Seems that it may be due to some plate/cover under the car that resonates at -3k ? Unfortunately I can't crawl to see.

It would be fantastic if the car could be driven in gear 2-3k on a ramp of some sort (like a dyno) over a pit. I would then be simple to see where the noise i comin from.
My feeling is that it's not coming from the engine ... (purely my thoughts/invesigation)

[kennyc]

Yes.
No 'rattle' at all reving 2-3k - only when in gear - 100%.
It seems that it can't b the turbo waste gate given that there is no 'rattle' reving in neutral ?

Seems that it may be due to some plate/cover under the car that resonates at -3k ? Unfortunately I can't crawl to see.

It would be fantastic if the car could be driven in gear 2-3k on a ramp of some sort (like a dyno) over a pit. I would then be simple to see where the noise i comin from.
My feeling is that it's not coming from the engine ... (purely my thoughts/invesigation)

Well thats alright then, i can live with that.

[AdamD]

It seems that it can't b the turbo waste gate given that there is no 'rattle' reving in neutral ?

The engine won't be under load in neutral, so you can expect the vibrations throughout the engine bay to be quite different. If it is wastegate flutter, it may be most noticeable under heavy throttle at certain engine speeds when the engine is loaded? (Turbo experts please correct me if required - this is just conjecture on my part.)

Getting a car that exhibits the rattle onto a dyno and having someone look closely with the bonnet up would be helpful in tracking the noise down - if there is still any question as to what the real cause is, that is. Sounds like VW are pretty certain.

[GTICam]

Just read through this, including page 4. I noticed the buzz/rattle under acceleration since day one. Now have 3000km on my car and it is still making the noise, just as everyone says - under moderate acceleration from 2400rpm up to about 2800rpm. I was sure it was a heat shield or a baffle in the rear muffler...
Guess that means I've got a "normal" GTI?
Cam.