Noise insulation, sound deadening, rattle fix Z4 E89 (35is)

[taranfx]

So I bought a 2011 35is a week ago. First things first, started the noise insulation and sound deadening process.

These are my objectives:

Sound deadening and insulation on:
1. Doors
2. Trunk area
3. Thin plastic areas
4. Roof

And
5. Fix rattles with felt, CCF tapes throughout the body.



Materials used:
- 80 mil Butyl sheets for reducing resonance and lot of thin metal noises. https://www.amazon.com/gp/product/B...0d-20&linkId=d87306adda946c331fe302217121d737
- CCF sheets for sound insulation https://www.amazon.com/gp/product/B...0d-20&linkId=6fceb521c34384473966c532f6926cf0
- Felt, CCF tapes [Home depot]

** this thread will be updated as I make progress **

1. Doors
Open the door cardboard (follow bavsound guide ).
Next, unscrew the speakers


Then add butyl sheets to outer door panel


Repeat for doorwell subwoofer

and rear side speakers

2. Trunk area
Half-open roof state


Remove the lining by pulling the plastic trim screws out. (you need a metallic trim removal tool for this)




5. Rattles
Man source of rattles are:
i. Dashboard
ii. dome light
iii. rollover protection covers

i. Dashboard
To unscrew the dashboard trim, follow http://e89.zpost.com/forums/showthread.php?t=1148144.
Its roughly 7-8 screws.

Unscrew two more to release the center air vents and add tape to that too..

ii. Dome light
Dome light is pretty easy to remove. Use flat trim remover and tuck it in to pull it out about 1-2" on each side. Then using two fingers on the right, press-in and release the clip and whole thing will come out.

Add some to the compartment as well

 

[ultramega]

Hey taranfx,

Any chance you can update your post so all the photos show? - some of them are missing.

This is on my to do list so will be very helpful.

 

[flybobbie]

Done all that already, doesn't make a fat lot of difference to be honest.

 

[ultramega]

Ah, that's disappointing. This is by far the (road) noisiest car I've ever had.

 

[flybobbie]

Most rattles reduced by spraying silicone all around all panel gaps. The rft are noisy, better with normal.
I would guess i probably just got used to any noise reduction from the padding.

 

[ultramega]

Forgive me if I'm being a doofus, but I'm not sure what you mean by spraying silicone around the panel gaps.

Already on normal tyres. Never liked RFT's, and neither did the previous owner.

 

[flybobbie]

Every joint on dashboard, all plastic panels. I even had to spray behind iDrive to stop a rattle.
Sun visors tap on plastic. Also coat all rubber trim.
I actually use some bumper shine stuff, i think Turtlewax. Does the job.

 

[AnubisZed]

Hey taranfx,

Any chance you can update your post so all the photos show? - some of them are missing.

This is on my to do list so will be very helpful.

Possibly won't update as this thread is 3 1/2 years old with no follow up since!

 

[Outlawraceparts]

I'm in the process of doing a stereo install on my 2011 Z4 35is with a full sound deadening job including professional materials from Resonix Sound Solutions. I will give my honest opinion when the job is completed.

 

[javis20]

I would concentrate on the wheel wells and liners. That's, in my opinion, where most of the noise comes from.

 

[flybobbie]

Yes a lot of noise seems to come from the rear wheel area road noise.

 

[javis20]

If you remove the rear plastic wheel well liners, there is a large gap between the rear quarter panel and structural part of the frame. It allows noise to travel from the front of the rear wheel wells to the front of the cockpit. Stuff it with noise absorbing foam. Than add sound deadening to the wheel well liner itself.