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Gentle Knocking Noise Coming From A Closed Roof

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Exactmax
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Gentle Knocking Noise Coming From A Closed Roof

Post by Exactmax » Wed Feb 17, 2010 5:58 pm

Hi,

I have a gentle knocking noise coming from the roof on the passenger side behind the seat. I have just spent the last hour trying to find out where the noise is coming from but no result. I have had the rear springs replaced so I know its not them. The noise only happens when the roof is up. The knocking noise is like something is swinging back and forth when the car goes over bumpy ground (20-30mph or less).

Anybody have any ideas as its driving me around the bend.... Thanks
2004 BMW Z4 2.2i SE - Bright Red - Black Leather - Clear Brake Lights - Xenon Lights - Black Kidney Grills - Red Brake Calipers - Front Parking Sensors - 19" Redline LM Wheels - BMW Aero Spoiler - Eibach Pro Kit - Longlife Quad Exhaust System

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by lacroupade » Wed Feb 17, 2010 7:27 pm

Is the tray under the roof stash space firmly locked in the down position?
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Exactmax
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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Exactmax » Wed Feb 17, 2010 9:01 pm

Yeh, I've driven with the boot shelf in the up position and the normal down position and the knocking noise is still there... Its so bloody annoying its unreal!!!
2004 BMW Z4 2.2i SE - Bright Red - Black Leather - Clear Brake Lights - Xenon Lights - Black Kidney Grills - Red Brake Calipers - Front Parking Sensors - 19" Redline LM Wheels - BMW Aero Spoiler - Eibach Pro Kit - Longlife Quad Exhaust System

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Exactmax » Thu Feb 18, 2010 4:10 pm

Anyone got any ideas?
2004 BMW Z4 2.2i SE - Bright Red - Black Leather - Clear Brake Lights - Xenon Lights - Black Kidney Grills - Red Brake Calipers - Front Parking Sensors - 19" Redline LM Wheels - BMW Aero Spoiler - Eibach Pro Kit - Longlife Quad Exhaust System

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Rudd » Thu Feb 18, 2010 4:12 pm

has something not dropped in it and is rolling about or is there a cable loose?

just thinking out loud so im probably wrong :D

try and fish ur hands round a little to se if anything is lose

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Exactmax » Thu Feb 18, 2010 4:53 pm

I've had a good look around the boot and the roof lining and I couldn't see or feel anything loose. It's not a rattle or sqeek noise but more like if someone is gently taping on the side of the roof (it's hard to try and explain really)!
2004 BMW Z4 2.2i SE - Bright Red - Black Leather - Clear Brake Lights - Xenon Lights - Black Kidney Grills - Red Brake Calipers - Front Parking Sensors - 19" Redline LM Wheels - BMW Aero Spoiler - Eibach Pro Kit - Longlife Quad Exhaust System

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Rudd » Thu Feb 18, 2010 5:03 pm

was it not raining :poke:

why dont you get someone to drive your car while you sit and listen around for the source or viser-verser

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Re: Gentle Knocking Noise Coming From A Closed Roof

Post by Exactmax » Thu Feb 18, 2010 5:22 pm

Might have to do that. I was hoping someone might of had the same problem and found a solution?
2004 BMW Z4 2.2i SE - Bright Red - Black Leather - Clear Brake Lights - Xenon Lights - Black Kidney Grills - Red Brake Calipers - Front Parking Sensors - 19" Redline LM Wheels - BMW Aero Spoiler - Eibach Pro Kit - Longlife Quad Exhaust System

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Gentle Knocking Noise Coming From A Closed Roof

Post by thecremeegg » Sun Sep 09, 2018 12:26 am

Bump! Was this ever solved? I have the same issue and it's driving me mental!
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Crazy Harry
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Gentle Knocking Noise Coming From A Closed Roof

Post by Crazy Harry » Sun Sep 09, 2018 8:09 am

thecremeegg wrote: Sun Sep 09, 2018 12:26 am Bump! Was this ever solved? I have the same issue and it's driving me mental!
So here's the obvious question - does it knock with the roof down?

Yes and its most probably not the roof; no and it is and you've got a very limited set of causes - more likely the roof is amplifying the sound.

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Gentle Knocking Noise Coming From A Closed Roof

Post by thecremeegg » Sun Sep 09, 2018 10:24 am

Only seems to do it with the roof up and it doesn't seem to be affected by bumps.
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Gentle Knocking Noise Coming From A Closed Roof

Post by ph001 » Sun Sep 09, 2018 7:55 pm

The clear plastic wind blockers inside the roll hoops tend to rattle about and you can’t hear them with the roof down. Tiny blob of clear silicone in each corner sorts it.
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Gentle Knocking Noise Coming From A Closed Roof

Post by thecremeegg » Sun Sep 09, 2018 11:06 pm

Hmm I'll have a look at that. It's weird as it sounds like it's coming from the back of the car rather than in the cabin but you never know!
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