Help with Rattle Reduction/Deadener

[Zavenoa]

First, thanks to everyone who has been helpful thus far, your tips and suggestions have been appreciated.

The car I'm working on is a Toyota Corolla 2010 S, If it matters my system is as follows:

Head Unit: Pioneer AVH-X8500BHS

Front Speakers: Polk Audio DB6501

Rear Speakers: Polk Audio DB691

4 Channel Amp: Pioneer GM-6500F

Subwoofers: 10" Infinity Reference 1062w

Mono Amplifier: Pioneer GM-D9601

Enclosure: Atrend E10Dv B Box (Temporary until I build a custom box)

​

Now that I've got everything functioning correctly, I've got a serious problem with rattle. I'm 99% sure I've found the primary culprit, the rear deck, but I'd like to take care of as much as I can. I picked up a couple sheets of Stinger Roadkill because I heard Dynamat smells awful and the guy at the shop told me to use small strips like this picture below.

Proposed Installation, cover plastic fins or framing on each piece of trim:

View attachment 26542495

​

That is just one piece, there are probably 20 or so pieces of trim I would need to do this to, which would take forever, but I'll do it if it will help. I just want to make sure I'm not wasting my time

As I mentioned the rear deck seems to be the primary problem. There is a piece that actually makes contact with the rear window, and I believe that's where the majority of the rattle is coming from. It ***** that it is highly visible, otherwise I'd slap some of this deadener on it and call it good.

Rear Deck:

View attachment 26542502

Rear Deck from Exterior:

View attachment 26542501

Rear Deck from Interior:

View attachment 26542503

Rear Deck with Trim Removed From Exterior:

View attachment 26542505

Rear Deck with Trim Removed from Interior:

View attachment 26542504

Under side of Rear Deck:

View attachment 26542499

​

Any input would be greatly appreciated.

Click to read more...

 

[Zavenoa]

Here it is finished, this actually wasn't too difficult, but if anyone knows a more effective way let me know. Just in case it wasn't clear in my first post, I'm not trying to reduce exterior noise, I'm trying to reduce interior rattle.

Finished Reverse:

View attachment 26542507

Visible Side:

View attachment 26542506

​

 

[Zavenoa]

I finished this and did all of the trim pieces like the pictures above, putting deadener anywhere there might possibly be contact points. The only piece I did more to was the rear deck. For that I started by ripping off the padding seen on the underside in my first post and then completely covered every square inch of it I could in deadener, and then for good measure used a little hot glue to stick the padding over top of it. It was a huge PITA but it worked incredibly well, reducing interior rattle significantly. It did not solve the main rattle when the subs are hitting really hard, but I didn't think it would. After narrowing that down a little more I believe I've determined it's either the rear deck hitting the read windshield as I thought, or the trunk itself rattling because the seal isn't tight enough. Will investigate further, but I'll figure it out.

Here are some quick shots of what the underside of the trim pieces I coated look like. This isn't all of them, there are a couple of other small pieces that I just didn't feel like taking pictures of. This seemed to work well enough I'll probably go nuts over time and do the whole car, not to mention drop in deadener in the trunk and on the doors for S&Gs.

View attachment 26542536

View attachment 26542537

View attachment 26542538

View attachment 26542539

View attachment 26542542

​

And yes my fingers kill from molding all of this stuff...

 

[tommydh 10+ year member]

I have always believed in Overkill. If what you did helps great but if it persist just keep adding I would try to determine actual contact points on panels and focus on those . I use Fatmat and so far in my Mini I've used 90 sqft of it. and I now am chasing the freaking door locks they rattle in the sleeve.

 

[glitchsta 10+ year member]

I don't think you need to cut it all into small pieces...at least I never did...I did some research before I gutted my jeep grand cherokee and never saw anyone doing that...I took the whole roll and used a roller and just pushed it around the curves and made slits where it was needed so it would sit flat...of course it does take alot more sound deadening material to do this...I have probably put in 80 sq. ft. in my jeep and still dont have it all covered...there will almost always be something rattling...at least a door handle....but putting in sound deadening material was probably the biggest improvement to the sound quality of my system, that and building a custom box...

 

[glitchsta 10+ year member]

I don't know if you cut that stuff up in little pieces or just need to roll it flat from the pictures...remember more surface area the stuff is touching the more vibration its gonna absorb...

 

[garretttt4 10+ year member]

Looks great man. One cheap ass thing I saw from someone in town was he took a towel and cut strips and put it around the trunk on the seal with hot glue. Made the trunk close really tight. Had to SLAM it to get it to close. Idk if it made a huge diff cuz he already had deadner in there but he said it did somehow. Idk I kinda wanna try it just for fun someday and see if it does anything. With hot glue it'd just peel off if it didn't do anything anyways....

 

[glitchsta 10+ year member]

I filled the back of jeeps hatchback door with spray foam from lowes...most solid door I ever seen =p silent to the knock

 

[Zavenoa]

So the little strips on every contact point worked perfectly, and going nuts on the rear deck was probably the biggest help, but the guy that sold it to me was right, you only need a little bit of it on the contact points, although more certainly won't hurt.

I plan on continuing until everything is done, but I have a bigger issue with my power. It appears Corollas weren't designed to handle pushing over 3000w of stereo equipment. Must upgrade power before anything else.

After power, I need to deaden/insulate the back seats and possibly get some kind of small fans, I was thinking the small ones they use in desktops. The amps are getting majorly hot mounted on the back seats and the subs are pulled way back to give plenty of ventalation for them, I just think the trunk is too small to disburse that much heat so a little air flow might help. I'll see how insulating the back of the seats the amps are mounted to works.