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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 03-13-2014, 04:07 PM
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Shakeydeal Shakeydeal is offline
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Trunk spoiler didn't stick......

As the thread says........

I put my new spoiler on tuesday. I prepped the trunk by cleaning with isopropyl alcohol. I applied the 3M tape supplied with the spoiler and it seemed to hold pretty well. Today it was loose, so I removed it. The tape adhered well to the spoiler, but not so much to the trunk.

The only thing I can think of is that it rained yesterday, but I didn't drive the car. I drove it today.

Any thoughts on how to proceed with round two?

Thanks,

Shakey
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  #2  
Old 03-13-2014, 04:14 PM
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thekurgan thekurgan is offline
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Use some paint cleaner on the painted surface, there may have been some sealant or wax left on the paint. Alcohol will not remove waxes or sealants.
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  #3  
Old 03-13-2014, 04:29 PM
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pointandgo pointandgo is offline
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Quote:
Originally Posted by Shakeydeal View Post
As the thread says........

I put my new spoiler on tuesday. I prepped the trunk by cleaning with isopropyl alcohol. I applied the 3M tape supplied with the spoiler and it seemed to hold pretty well. Today it was loose, so I removed it. The tape adhered well to the spoiler, but not so much to the trunk.

The only thing I can think of is that it rained yesterday, but I didn't drive the car. I drove it today.

Any thoughts on how to proceed with round two?

Thanks,

Shakey
Did you do this:

Once all the backing is peeled form under the part, apply some really firm pressure for about 30 seconds in all mounting places. The 3M tape needs to bond with the mounting surface, and it needs pressure to do this. The part will seem like it is stuck on, but keep pressing for at least 30 seconds.
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  #4  
Old 03-13-2014, 04:36 PM
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Shakeydeal Shakeydeal is offline
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Two really good tips, thanks!


So Goo Gone is good to clean the trunk with?


Shakey
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Last edited by Shakeydeal; 03-13-2014 at 04:43 PM.
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  #5  
Old 03-13-2014, 04:48 PM
wilt wilt is offline
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Quote:
Originally Posted by Shakeydeal View Post
Two really good tips, thanks!


So Goo Gone is good to clean the trunk with?


Shakey
Oh gawd, no, you leave a film of Goo Gone and nothing sticks!
I don't know what the body shops do to clean the surface, before they stick these things (which is how I added a rear spoiler on the E46 right after my car arrived from Germany, since it had to be painted to match the car).
But maybe using polishing compound on the narrow area where the spoiler will stick would clean off wax without leaving a oily film that has to be then cleaned off.

Last edited by wilt; 03-13-2014 at 04:49 PM.
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  #6  
Old 03-13-2014, 04:50 PM
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Shakeydeal Shakeydeal is offline
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Originally Posted by wilt View Post
Oh gawd, no, you leave a film of Goo Gone and nothing sticks!
I don't know what the body shops do to clean the surface, before they stick these things (which is how I added a rear spoiler on the E46 right after my car arrived from Germany, since it had to be painted to match the car).
But maybe using polishing compound on the narrow area where the spoiler will stick would clean off wax without leaving a oily film that has to be then cleaned off.
Yeah, that makes sense. Now that I think about it, GG is not a good idea.


Shakey
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Old 03-14-2014, 05:46 AM
fdriller9 fdriller9 is offline
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If its cold where you are, the adhesive is less tacky.

Heat it up before and after applying. Also keep it dry for a couple days...check the forecast
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  #8  
Old 03-14-2014, 06:12 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by Shakeydeal View Post
As the thread says........

I put my new spoiler on tuesday. I prepped the trunk by cleaning with isopropyl alcohol. I applied the 3M tape supplied with the spoiler and it seemed to hold pretty well. Today it was loose, so I removed it. The tape adhered well to the spoiler, but not so much to the trunk.

The only thing I can think of is that it rained yesterday, but I didn't drive the car. I drove it today.

Any thoughts on how to proceed with round two?

Thanks,

Shakey

What you need is a grippy surface!

Try Goo Gone instead of rubbing alcohol.

Then, a light sand blast - she'll stick now!
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  #9  
Old 03-14-2014, 09:07 AM
wilt wilt is offline
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Quote:
Originally Posted by CALWATERBOY View Post
What you need is a grippy surface!

Try Goo Gone instead of rubbing alcohol.

Then, a light sand blast - she'll stick now!
The Goo Gone is so the sand won't stick to the paint, right?
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  #10  
Old 03-14-2014, 01:25 PM
Mick the Quick Mick the Quick is offline
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Use a heat gun on the 3M tape.

Mick
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