 My Weekend Project, Removing the Backpad |
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| jgara962 |
 Jan 13 2007, 04:48 PM
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#1
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Yo, this is how I roll  Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California  |
My weekend project is to remove the backpad and rubber pad behind it. So far so good - the two combined weight 26 lbs! I'm going to put down some Dynamat Extreme and then lay a Morph carpet kit over the top.
One question. Do I need to remove all of the glue that is stuck to the firewall from the original pad, or do you think I can just lay the Dynamat over it? What should I use? So far I've tried Goof Off and a razor blade scrapper, but that's going to take a while and I already have a buzz going (IMG:style_emoticons/default/biggrin.gif) Attached image(s) 
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Replies(1 - 19)
| McMark |
Jan 13 2007, 05:18 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Bad news, you have to remove it. Otherwise the Dynamat won't stick. If you sound deadening material is not 100% adhered to the surface it won't work like it's supposed to. Go get a bunch of 120 grit sandpaper and that will take most of it off. You'll have to spray some paint on the sections that sand down to bare metal. If the sandpaper doesn't take it all off you can try a wood chisel or a putty knife to scrape off the remnants. Clean the whole thing with alcohol or a paint-prep degreaser (PPG DX-330). And try to keep your hands off after degreasing. Skin oils will affect adhesion.
Brake cleaner or paint thinner will take off the old glue, but I've found that it makes more of a mess and is more of a hassle then sandpaper. You'll be surprised by how much comes off in the first 5 minutes of sandpaper. Take your time and be thorough and your Dynamat will last a long time. |
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| Randal |
Jan 13 2007, 05:24 PM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(jgara962 @ Jan 13 2007, 02:48 PM)  My weekend project is to remove the backpad and rubber pad behind it. So far so good - the two combined weight 26 lbs! I'm going to put down some Dynamat Extreme and then lay a Morph carpet kit over the top. One question. Do I need to remove all of the glue that is stuck to the firewall from the original pad, or do you think I can just lay the Dynamat over it? What should I use? So far I've tried Goof Off and a razor blade scrapper, but that's going to take a while and I already have a buzz going (IMG:style_emoticons/default/biggrin.gif) Adhesive remover from home depot takes it right off, but be careful, it will strip the paint off as well. I ended up stripping the entire compartment, as you know. |
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| jgara962 |
Jan 13 2007, 05:37 PM
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#4
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
QUOTE(McMark @ Jan 13 2007, 03:18 PM) Bad news, you have to remove it. Otherwise the Dynamat won't stick. If you sound deadening material is not 100% adhered to the surface it won't work like it's supposed to. Go get a bunch of 120 grit sandpaper and that will take most of it off. You'll have to spray some paint on the sections that sand down to bare metal. If the sandpaper doesn't take it all off you can try a wood chisel or a putty knife to scrape off the remnants. Clean the whole thing with alcohol or a paint-prep degreaser (PPG DX-330). And try to keep your hands off after degreasing. Skin oils will affect adhesion. Brake cleaner or paint thinner will take off the old glue, but I've found that it makes more of a mess and is more of a hassle then sandpaper. You'll be surprised by how much comes off in the first 5 minutes of sandpaper. Take your time and be thorough and your Dynamat will last a long time. Fuch!!!!!! I knew it. Thanks for the info. I'll give the sandpaper a try. I'm about to blackout in the garage from the Goof Off fumes. Your right, it is just making a big mess out there too. |
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| ClayPerrine |
Jan 13 2007, 05:47 PM
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#5
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Life's been good to me so far..... Group: Admin Posts: 15,488 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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You can always use a die grinder with scotch brite roll lock pads on it. They are cheap, and they take stuff like that off fast. Only downside is that they will take the paint off too. So you may have to respray the whole area to cover the bare metal and let it dry before you put up the dynamat.
BTW.. I have dynamat extreme inbetween my firewall and my back pad. Dropped the temps in the car a bunch, and lowered the noise level. |
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| watsonrx13 |
Jan 13 2007, 07:11 PM
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#6
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Advanced Member Group: Members Posts: 2,734 Joined: 18-February 03 From: Plant City, FL Member No.: 312 Region Association: South East States |
John, I'm going to tell you the secret to removing the glue residue, without affecting the paint underneath, but you have to promise not to tell anyone else...
Here's the secret.... soak the glue with 3M general purpose adhesive cleaner... I got mine from the local Auto paint store... let it soak, them rub off with a clean rag.... you might have to apply several times, but it works like a charm....  Remember, don't tell anyone else... (IMG:style_emoticons/default/wink.gif) -- Rob |
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| jgara962 |
Jan 15 2007, 09:52 PM
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#7
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
Here is an update on my project, which is now a multi-weekend project. (IMG:style_emoticons/default/dry.gif) I tried taking the glue off with 120 grit sandpaper, but it would either not take it off, or go right through to the metal. Next was a sander and 220 grit, but as soon as I hit an edge, it would again go right through to the metal and it wasn't that effective on the glue. I ended up going back to the razor blade scraper and Goof Off. Man, it was a killer, but seemed to work the best. I wiped everything down and did a lot of vacuing, and then sprayed paint on the spots where the metal was exposed. Notice the camoflage look (IMG:style_emoticons/default/biggrin.gif)
Next step is to break off the back pad mounting tabs. I've got one off, but need to get a chisel for the others. The screwdriver wasn't up to the task. Then put new black RTV in all of the holes and lay on the Dynamat. After that, put on the carpet once I get in touch with Morph. Attached image(s) 
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| Hammy |
Jan 15 2007, 10:02 PM
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#8
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
Looks like your firewall cut itself shaving (IMG:style_emoticons/default/smile.gif)
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| grantsfo |
Jan 15 2007, 10:05 PM
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#9
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Arrrrhhhh! Group: Members Posts: 4,327 Joined: 16-March 03 Member No.: 433 Region Association: None |
I'm sort of taking retro approach of preserving all my adhesive in my race car. Think about all that hard work that some line worker went to to adhere that crap to the car.
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| jgara962 |
Jan 15 2007, 10:07 PM
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#10
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
QUOTE(grantsfo @ Jan 15 2007, 08:05 PM) I'm sort of taking retro approach of preserving all my adhesive in my race car. Think about all that hard work that some line worker went to to adhere that crap to the car. As I was sitting there inhaling Goof Off fumes, I was wondering what chemicals those crazy Germans were putting in their glue back in '74. (IMG:style_emoticons/default/blink.gif) |
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| McMark |
Jan 16 2007, 01:38 AM
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#11
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Bummer the sandpaper didn't work. (IMG:style_emoticons/default/sad.gif) Looks cool though. I think you should leave it exposed. (IMG:style_emoticons/default/w00t.gif)
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| Hammy |
Jan 16 2007, 01:59 AM
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#12
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
you can lose more weight by removing all the sound tar on the floor.
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| jgara962 |
Jan 16 2007, 10:44 AM
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#13
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
QUOTE(McMark @ Jan 15 2007, 11:38 PM) Bummer the sandpaper didn't work. (IMG:style_emoticons/default/sad.gif) Looks cool though. I think you should leave it exposed. (IMG:style_emoticons/default/w00t.gif) This from the guy who has graffiti on the side of his car (IMG:style_emoticons/default/laugh.gif) |
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| McMark |
Jan 16 2007, 12:29 PM
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#14
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
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| Chris Pincetich |
Jan 16 2007, 12:52 PM
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#15
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B-) Group: Members Posts: 2,082 Joined: 3-October 05 From: Point Reyes Station, CA Member No.: 4,907 Region Association: Northern California |
John - looks good. Are you putting in a harness or just shedding some weight?
I have been struggling with the backpad issue: remove or not? I have that "QuietCar" paint and put 4 coats on the back of my backpad and it really helped. 3-4 coats on the firewall is in the future....I like to be able to hear my cell phone ring when driving, not that they can hear me when I talk (IMG:style_emoticons/default/biggrin.gif) Keep up the good work (IMG:style_emoticons/default/beerchug.gif) |
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| Randal |
Jan 16 2007, 12:57 PM
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#16
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(watsonrx13 @ Jan 13 2007, 05:11 PM) John, I'm going to tell you the secret to removing the glue residue, without affecting the paint underneath, but you have to promise not to tell anyone else... Here's the secret.... soak the glue with 3M general purpose adhesive cleaner... I got mine from the local Auto paint store... let it soak, them rub off with a clean rag.... you might have to apply several times, but it works like a charm.... Remember, don't tell anyone else... (IMG:style_emoticons/default/wink.gif) -- Rob Your right Rob. I used that stuff on the underside of my son's 944 hoodto remove the adhesive and it didn't hurt the paint at all. I forgot... |
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| jgara962 |
Jan 16 2007, 01:50 PM
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#17
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
QUOTE(ChrisNPDrider @ Jan 16 2007, 10:52 AM) John - looks good. Are you putting in a harness or just shedding some weight? I have been struggling with the backpad issue: remove or not? I have that "QuietCar" paint and put 4 coats on the back of my backpad and it really helped. 3-4 coats on the firewall is in the future....I like to be able to hear my cell phone ring when driving, not that they can hear me when I talk (IMG:style_emoticons/default/biggrin.gif) Keep up the good work (IMG:style_emoticons/default/beerchug.gif) Hey Chris, After that autox at the Santa Rosa Airport in July, I put in a Willans Club Sport harness. The PO must of also had a harness in the car because of the two holes drilled through the firewall right behind the driver's seat. I had already bought the Dynamat, and when I removed the backpad and saw the black rubber sound pad behind it, I thought "S%$#, why did I just spend $60 on a Dynamat when there was already a pad there I could carpet over. (IMG:style_emoticons/default/headbang.gif) " But I couldn't believe how much that thing weighed when I pulled it off! The other reason I'm pulling it out is because I didn't like the look of the Corbeau seats against the cutouts for the original seats in the backpad. It was just two big gaps behind the seats which looked kind of dumb. Cleaner look, less weight - no downside as far as I can tell! |
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| McMark |
Jan 16 2007, 02:09 PM
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#18
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I thought about dropping by last Sunday to see if you were working. I guess I should have. I had SirAndy and Rotten Robby in the car with me.
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| jgara962 |
Jan 16 2007, 02:18 PM
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#19
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Yo, this is how I roll Group: Members Posts: 823 Joined: 5-April 05 From: Napa, CA Member No.: 3,879 Region Association: Northern California |
QUOTE(McMark @ Jan 16 2007, 12:09 PM) I thought about dropping by last Sunday to see if you were working. I guess I should have. I had SirAndy and Rotten Robby in the car with me. Great, the three of you could have drank beer and watched me. (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/dry.gif) Really though, I wish you would have, it would been cool. |
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| watsonrx13 |
Jan 16 2007, 04:03 PM
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#20
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Advanced Member Group: Members Posts: 2,734 Joined: 18-February 03 From: Plant City, FL Member No.: 312 Region Association: South East States |
Well, if you would used my suggestion, you probably wouldn't have done as much work (IMG:style_emoticons/default/wink.gif) , but congratulations on finishing it... (IMG:style_emoticons/default/beerchug.gif)
Here's a shot of my rear firewall after about 10 minutes of using the 3M...  -- Rob |
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