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Noise from the trunk


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13 replies to this topic

#1 pos

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Posted 24 January 2013 - 04:58 PM

Hi

I have a Subaru Legacy Station wagon (made dec 2010, model year 2011 and registered for traffic mars 2012)

I have noticed that if the road is not that smooth/flat I hear rattling noise from the tailgate. It is soooo %€%£$®† annoying! It sounds like plastic against metal. I put myself in the back (trunk), my wife behind the steering wheel and took a trip in the neighborhood. When I pushed my palms against the platic on the inside of the tail gate (out) the noise was drastically reduced. A guess is that the big piece of plastic on the inside is not fastened correct or should have rubber between the plastic and the metal for dampening.


Is this piece of plastic easily removed without the risk to destroying it?
Anyone that have had this problem? What did you do about it?

Feedback very much appreciated


/Peo

#2 Legacy777

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Posted 27 January 2013 - 12:34 PM

Hi,

Yeah you should be able to remove that plastic trim piece. There are typically little plastic clips that snap into the plastic trim piece and the tailgate. Over time they will loosen and you get the rattles. What I have done on my Impreza wagon is use some adhesive backed foam weatherstripping between the tail gate and trim piece to absorb some of the rattles.

A trim removal tool like this helps get the pieces off.

Posted Image

Also, when you get the trim piece off, take another ride around the neighborhood to see if all the noises are gone, or if some are still there. There may be some connectors or other items in the tail gate that are rattling.

#3 brus brother

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Posted 27 January 2013 - 02:11 PM

+1 for the rattling connectors

#4 86BRATMAN

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Posted 27 January 2013 - 02:19 PM

I am all for the diy fixes, but if this car has factory warranty remaining let subaru deal with it before you take anything apart.

#5 pos

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Posted 27 January 2013 - 05:11 PM

I am quite sure I am more thorough than Subaru in this matter. Therefor I want to take a look at it first.

I manage to remove the big plastic trim piece enough to add something between the plastic and the metal. I took a silicon hose (from my nitro model helicopter. 2.5mm inner diam and 5 mm outer ) and cut it lenghtways and put it on the plastic trim piece. 90% of the noise gone !

Still little noise, but much less...

Then I put few rounds of tape (that electricians use) on this...

Posted Image

And.. voilá! ALL noise gone !!

This gap between the rear gate panel and the body surface can easily be adjusted (I have not adjusted it). But it feels more like it is to thin than wrongly adjusted.

Any comments? Anyone that have seen this issue? Do you think an adjustment will do the trick. Or could it be to thin?

#6 Legacy777

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Posted 28 January 2013 - 10:10 AM

So did you just wrap electrical tape around that metal latch piece?

I've noticed that on my Impreza that even with adjusting the metal latch piece the rear gate doesn't have as much "tension" when closed, so it does appear to rattle more. I may have to try the electrical tape trick.

#7 pos

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Posted 28 January 2013 - 11:17 AM

yeah.. The electricians plastic tape did the trick. I think I used 3 rounds of tape on it. But if of course depends on the tape used.

Maybe the metal latch piece should have been thicker. Construction error? Maybe... But I will know that for sure after trying to adjust it. But it closes smooth and _perfect_. So maybe I will continue with this tape alá MacGyver :) instead of adjusting it. If adjusted, the bolts torque should be 25 Nm according to the service manual.

You could see if this applies to you by putting a person in the trunk that push from the inside with his/her palms to see if it gets quiet when you drive. If it gets quiet it's probably this.. Or if you have a station wagon you could put something on the 2 rubber shims in the corners so the trunk-lid gets under press instead of having a person in the back.

Edited by pos, 28 January 2013 - 11:30 AM.


#8 Legacy777

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Posted 29 January 2013 - 09:03 PM

I've adjusted my latch as much as I can, so I'll have to go with the tape method :)

#9 pos

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Posted 02 February 2013 - 06:05 PM

If anyone is interested in a short summary with pictures......

The trunk rattle actually consisted of two problems with two separate solutions.

####
# 1 #
####

Problem:
Rattling plastic

Solution:
A silicon vacuum hose with 2mm inner diam used. Cut lengthwise with a scissor. After that the plastic trim was removed 1 cm (approx 1/3 inch) so that the lengthwise cut hose could be put on the trunk-lid plastic trim piece.

http://www.incedo.eu...ix/IMG_2662.JPG
http://www.incedo.eu...ix/IMG_2664.JPG
http://www.incedo.eu...ix/IMG_2665.JPG
http://www.incedo.eu...ix/IMG_2666.JPG
http://www.incedo.eu...ix/IMG_2667.JPG

####
# 2 #
####


Problem:
Probably to thin latch on the car makes the whole trunk-lid to rattle when driving on non flat ground (i.e ice and snow)

Solution:
A few rounds on electricians tape on lock latch (tips from a guy in a Swedish forum)
http://www.incedo.eu...ix/IMG_2668.JPG

Note:
The latch could be adjusted a bit (but I have not done that). A google search shows that people have had this issue. An adjustment often caused that the problem came back. So maybe their adjustments caused the trunk-lid get tighter so the rattle disappeared. But as it came back a theory is that it came loose very little after some time and started to rattle again. I think my trunk-lid is tight enough, closes perfect and has no play at all. So until proven otherwise, my opinion is that the latch piece on the car is little to thin which is fixed with the electricians tape (has no known drawbacks). I will continue with the tape as it's so easy to apply and remove. My opinion is that it could eventually be a construction problem.

#10 brus brother

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Posted 02 February 2013 - 09:37 PM

Fine work especially the split hose. In problem #1 I started at the last picture, I couldn't discern that something not factory original was present until I reviewed the top down sequence.

#11 forester2002s

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Posted 03 February 2013 - 02:59 AM

Thanks for posting this.
Did you have to glue the split-hose, to hold it in place?

#12 pos

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Posted 03 February 2013 - 04:39 PM

Thanks for posting this.
Did you have to glue the split-hose, to hold it in place?


No!

The force of the lengthwise cut silicon hose bent out to fit the plastic will have a force to try continue to be in its original form (i.e circular). Therefor it will squeeze the plastic trim piece and stay there. How well it will squeeze the plastic trim piece and stay in place probably depends on the hose inner and outer diameter. But... there is only a need to keep the hose in place until the plastic trim piece is put back on the trunk-lid. Then the plastic trim piece will also help to hold the silicone hose in place. So... two forces together keep it in place. And there is no need to do any damage to the car (i.e holes, glue etc etc).

#13 Legacy777

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Posted 03 February 2013 - 05:50 PM

Thanks for the pictures. That's pretty clever with the silicone hose!

#14 Legacy777

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Posted 10 March 2013 - 05:24 PM

Well I cleaned the Impreza on Friday and decided to give the electrical tape on the lift gate latch a try and so far it worked very well!  When I put the tape on I noticed the latch had a worn spot.  If I had to guess, I think that is one of the reasons it never had a "positive" feel when shutting.






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