Removing seat and floor liner to add floor sound deadening

[wagood]

Planning on doing the hatch area this week or next. How difficult is it to remove the side trim pieces where the sub is? Is it all clips or any more screws I need to look out for besides the 2 on the false floor?

I’ve found videos for the civic doors to follow but can’t seem to find anyone removing rear trim pieces other than the seats.

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[Victorofhavoc]

Planning on doing the hatch area this week or next. How difficult is it to remove the side trim pieces where the sub is? Is it all clips or any more screws I need to look out for besides the 2 on the false floor?

I’ve found videos for the civic doors to follow but can’t seem to find anyone removing rear trim pieces other than the seats.

They're really easy to remove. Start at the plastic at the rear lower area (the part where the lower latch is) and pull upwards. From there they all pull towards you.

The a, b, and c pillars all have one time use clips so be careful how far up you go, but the area with the light is removable without breaking the clip.

I highly recommend just buying a dozen of the green clips in case you break one. They're cheap. I also highly recommend butyl on the back of the plastics themselves. It really makes them feel nicer and not so cheap/hollow.

Watch out for the tighter fit areas as you're taking it apart. Some don't play well with more than a single layer of butyl or cc foam. Other areas have massive gaps and you can do multiple layers of foam without issue.

 

[slowcountry]

Fwiw I just wanted to test out how much sound deadening the dynamat actually does.. only did the spare wheel well and it made a huuuge difference. I have a bunch of extra dynamat so I'll be doing other areas over time

 

[Victorofhavoc]

Fwiw I just wanted to test out how much sound deadening the dynamat actually does.. only did the spare wheel well and it made a huuuge difference. I have a bunch of extra dynamat so I'll be doing other areas over time

Yes, butyl can work in two ways. It can either coat everything to block sound or be used on flimsy areas to deaden sound. Closed cell foam cannot deaden because it lacks mass to kill vibration and echo, but it can block sound even better without the weight penalty of butyl.

I've found the combo of the two is usually the sweet spot for me.

 

[wagood]

So far just did the hatch area.
Maybe 40% coverage with butyl and 100% coverage with 1 layer of CCF. Didn’t buy enough to do 2 full layers.

Like others have said here and on that civic thread, massively reduced the echo in the car. It cleaned up the road noise if that makes sense, instead of it sounding like it’s coming from all around me, I can now distinctly hear it coming in through the doors/windows, and the engine sounds louder since it’s not getting drowned out I guess.

Still not a quiet ride haha but it’s less aggravating for sure. Would recommend given the time and effort (~3 hours with my minimum effort style).

One thing I noticed when testing the sub before putting the trim back together was how much vibration there still was from the engine. It’s a shame it’s not better isolated from the factory, and this was after I already put butyl around it.

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