Knocking/Rattling at 700rpm

[Red20]

 

Hi all i've just bought a 1.2 tfsi 2011 A3.

Have an issue with a loud rattling at 600 - 800 rpm, once i've over 900 rpm the noise is gone. Nothing can be heard from above the engine in the bonnet, it can only be heard in the cabin and underneath towards the engine/car. Car drives perfectly so wondering if it'd a fuel line or something rattling? 

I did some research about it potentially being an air con clutch however when i put this on to auto it only makes a slight difference.

Any ideas :)?

Edited June 7, 2023 by Red20

[Stevey Y]

2 hours ago, Red20 said:

 

Hi all i've just bought a 1.2 tfsi 2011 A3.

Have an issue with a loud rattling at 600 - 800 rpm, once i've over 900 rpm the noise is gone. Nothing can be heard from above the engine in the bonnet, it can only be heard in the cabin and underneath towards the engine/car. Car drives perfectly so wondering if it'd a fuel line or something rattling? 

I did some research about it potentially being an air con clutch however when i put this on to auto it only makes a slight difference.

Any ideas :)?

Hi could be the flywheel how many miles has it covered?

Steve.

[Red20]

9 minutes ago, Stevey Y said:

Hi could be the flywheel how many miles has it covered?

Steve.

Thanks for reply, has done approx 80k, doesn't change when i put foot on clutch. 

It seems to becoming from almost directly under the driver seat

[Stevey Y]

5 minutes ago, Red20 said:

Thanks for reply, has done approx 80k, doesn't change when i put foot on clutch. 

It seems to becoming from almost directly under the driver seat

Hi they don't always stop rattling when you put the clutch in especially if its the release bearing gone dry, I would get your local garage to hoist it up on a ramp and have a listen'

Steve.