Rattling/ Buzzing and dynomat-type solution?? - Maybe.

[monty1269]

There have been a few posts about a rattling/buzzing noise coming from the rear of the Magnum. Today...I attempt to hunt down that bastitch and silence the wild beast. It all begins here...at the @$$-end (interior):



(Yes that is a Bacard! towel...and YES, I needed them! - UGH it was HOT! and I was THIRSTY! )

I began by pulling out all the interior pieces...The rear deck, and lower storage, the spare tire, the jack, side panels...all were relatively easy...(TIP: use a small towel to protect the panels from getting dirty from your grubby hands!!) they all popped of those clips fairly easily. Also, you will have to take out the leather side part of your rear seat to access all the screws for the side panel. Here's a shot with it removed:




In the end all this is exposed:



!!! look at those rub-marks!!!



Now lets look at the side panel I just took out!






Now lets try the other side...Nope. No rub marks there. hhhmmmm... This isn't exactly that metalic rattling noise I was initially looking for, but there's SOMETHING going on there...Maybe I carry to many water bottles in that side pocket?? Who knows...Moving on...Yank out the OEM "insulation" on the other side...(Take note of that black thing. It is a vent of some kind.)




At THIS point...I turned to my fellow LX'ers and searched here for the "low-budget dynamat". I found this thread:
MDS/SLP drone killed...at Home Depot!


I cleaned up the metal (as instructed) and started to roll this stuff out.... Trying to maintain as many large pieces as possible. VERY carefully rolling it, jamming it into corners, making sure ALL the metal was covered with no gaps between the two. TIP: Be sure to poke holes wherever there are holes in the sheet metal!! These are the guides to re-align the side panels when you go to put them back in!!) In this picture you can see that I left a "flap" that goes over the little black louvered-thing. - I assume this is to equalize the pressure when opening/closing doors.? Fnky what's that do??



See the square of alluminum when I put the OEM "insulation" back in place?



Completed passenger side:




Now lets not forget about the rear door!! Be SURE to get ALL the sheet metal! Take note in this picture the "Cheapo mat" within the door itself! (see the little shiney square??) And then cover the door...being sure to stay away from the wiring, and wire connectors. I push/pulled jammed my hand in there to get the layering under the wires and connectors when ever possible! AND I peeled away ALL the aluminum backing off the "Cheapo mat" around the wires or connectors too. - Last thing *I* want is the aluminum cutting into the wires!




Here it is...all "wrapped" and most parts back in place...



DONE!!




Does the Cheapo mat" cut down on the overall noise?? Yes! did *I* solve the rattling issue?.....mmmmmm....I'll have to say, "No." Although it has been cut down VERY much, *I* still believe it is there... SO...onto the next mission: working from the outside in. Now, How do I pull off the bumper?

[HemiLover]

Man, excellent write up and awesome pics!! It all seems like an ENORMOUS amount of effort....but it also sounds like many of you are just like me and little rattles, squeeks, buzz's and otherwise drive me bonkers!
Thanks again Monty for putting forth the effort to do what many of us would like to do.....it certainly helps us understand what the end result may be!

[KGBPro]

i wouldnt have covered that vent.....if im correct it has to do with ventilation from inside the cabin....though i may be wrong......wouldnt be the first time!
LOL
Great writeup!

[KGBPro]

Man, excellent write up and awesome pics!! It all seems like an ENORMOUS amount of effort....but it also sounds like many of you are just like me and little rattles, squeeks, buzz's and otherwise drive me bonkers!
Thanks again Monty for putting forth the effort to do what many of us would like to do.....it certainly helps us understand what the end result may be!

i have a few of those rattles....i just simply turn up the radio and those rattles go away LOL
however other rattles might start

[monty1269]

I didnt cover them up (totally). I put plastic wrap on the backside so that aluminum/foam/insulation wouldnt stick to that black vent-thingie. If it is for air movement, then air will move just fine....

[monty1269]

anyone pull the bumper yet? Maybe there's some metal hitting there too?? What else can I foam!?!?

[Token]

Great write-up! Thanks for the pics.

Just as an aside, have you tried driving around with the seats folded down?

The latch on the driver's side rear seat was rattling on mine, driving me nuts for the longest time, then one day I was carrying some big stuff in the back and had the seats down, and what do you know... The rattle was gone! It was weird, because the rattle sounded like it was coming from further back than the rear seat back.

I wrapped the metal post with the soft side of some self stick velcro, (essentially thin carpet) no rattles since.

Worth a shot.

[monty1269]

Here's a question!! Back in the day....WAY back! We used to have fun by putting pool acid into a 2liter bottle with some aluminium...things foamed and popped. (I leave it at that- 5th amendment rights ) Wouldn't it be a GOOD idea to remove the aluminum layer from the battery area?!?!

Just a thought!!???? Anyone??

[monty1269]

Great write-up! Thanks for the pics.

Just as an aside, have you tried driving around with the seats folded down?

The latch on the driver's side rear seat was rattling on mine, driving me nuts for the longest time, then one day I was carrying some big stuff in the back and had the seats down, and what do you know... The rattle was gone! It was weird, because the rattle sounded like it was coming from further back than the rear seat back.

I wrapped the metal post with the soft side of some self stick velcro, (essentially thin carpet) no rattles since.

Worth a shot.

Been there....done that.... I've had someone else drive with me in the back...and it is DEFINITELY coming from back there somewhere! But I couldn't pin-point it...so EVERYTHING got wrapped!

[KGBPro]

LOL if ya cant duck it....

[HemiLover]

i have a few of those rattles....i just simply turn up the radio and those rattles go away LOL
however other rattles might start

I guess I'm pretty lucky, I really don't have any "rattles"....just this annoying buzzzzzzzzzz that I was able to remedy (see the other "buzz" thread). Turning up the radio WAS my problem!

[sixsicksheep]

Are you sure it's not your L/P? The sell a dynomat remedy for it.

[gameover]

anyone pull the bumper yet? Maybe there's some metal hitting there too?? What else can I foam!?!?

i doubt anything is rubbing the bumper. i had took mine off to install the valves, and it's not really touching much.

you can removed it and check if you must, but first you would have to get some new plastic rivets for the fender well if you want to keep it OEM. in my case i said screw those cheap rivets and got some regular push pins.

first off there's 3 plastic rivets on each of the rear fender well to hold on the linens. then there's a screw (forgot the size, it's small) on top of those rivets that need to be removed. after you get those off, lift the gate and theres 5 more push pins (2 of them have the rubber) running along the top of the bumper. when you have all those removed, starting from one side, slide the bumper backwards to get it off of the hangers and do the same to the other side and thats all to it.

[Invader]

My vibration is coming from those plastic interior panels themselves, where they overlap and such (speaker grille to panel specifically). Dynomating those panels should help also.

Can also find some real thin (1/16") flocked tape to stick to the overlap areas, to reduce contact rubbing.
i.e. http://www.dorrie.com/nvhtape/nvhtape.htm

[Invader]

or
http://multimedia.mmm.com/mws/mediaw...666xB4COrrrrQ-