First 914 Restoration, Floor boards and tar like substance |
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First 914 Restoration, Floor boards and tar like substance |
tracks914 |
Jan 24 2003, 09:19 PM
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#1
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Canadian Member Group: Benefactors Posts: 2,083 Joined: 15-January 03 From: Timmins, Ontario, Canada Member No.: 153 Region Association: None |
After removing the interior of my 914 I noticed that the floor of the car was painted the original metalic gold. The floor under the seats was not painted but were still black. The floor in front of the seats looks great with no rust anywhere, not even around the edges where it meets the frame sections. It is all sound and solid even from underneath. (under the car still has the original gold paint as well)
Under the seat was different. There is rust around the seat mounts and around most of the edges I was able to pry away enough black tar like stuff to see some surface rust. There was also some rust, not much at all, in the long depressions in the floor boards. It took me about two hours to totally remove the "black stuff" from under the seat (IMG:style_emoticons/default/smash.gif) because about 90%+ had a great bond to the original steel. (no rust at all except at the edges) After sandblasting the rust that was there I found it was all surface rust and all I have to do is prime and repaint. 2 Questions for the experienced - 1- Given what I have found, would it be worth tearing out the rest of the "black stuff" in the front 2/3 of the car floor? 2 - What is that "stuff" and can I replace it with something as good or better? In the picture below, only the dark brown colour was rust, the light brown was the bonding left from the "black stuff" Tx Doug |
bhfast |
Jan 24 2003, 11:06 PM
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#2
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live it loud, balls out Group: Members Posts: 83 Joined: 30-December 02 From: Chandler, AZ/Daytona Beach, FL Member No.: 48 Region Association: Southwest Region |
I recently removed the tar from the floorboards on my 914 and found some rust, even though it seems to be well sealed the water can still get in. I stripped everything to bare metal and used POR-15 everywhere inside. i am planning on use ing some dynamat type sound deadening before installing new carpet.
Brian |
Dave Cawdrey |
Jan 25 2003, 12:28 AM
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#3
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Dumbo going poop, Daddy :) Group: Members Posts: 818 Joined: 22-January 03 From: Seattle, WA USA Member No.: 182 |
Lucky you. Look at mine, er...... well whats left of it (IMG:style_emoticons/default/wink.gif)
Tear all that shit out, clean, POR 15, then jute (carpet padding). If you ever get wet, easier to fix. Dynamats good, but sticky. |
jonwatts |
Jan 25 2003, 12:30 AM
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#4
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no rules, just wrong Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141 |
Just to expand on bhfast's answer a bit. It's pretty common (around here at least) to remove the black tar paper because of the rust you're seeing. I have to wonder if there was a cost savings to painting the car after this stuff was installed or if this was an acceptable practice before cars were galvanized.
Anyway, it's a good idea to do what he did and remove it all. Put down a good layer of rust protection and then put something back on top of that if you want. I've also considered drilling drain holes in the floor and trunks since almost all 914s leak water somewhere. To remove the tar paper I've used a strong putty knife and either a propane torch or a heat gun. Both work equally well but propane is better at stinking up the garage. (IMG:style_emoticons/default/blink.gif) Good luck. Jon |
jonwatts |
Jan 25 2003, 12:33 AM
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#5
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no rules, just wrong Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141 |
QUOTE(korijo @ Jan 24 2003, 10:28 PM) Lucky you. Look at mine, er...... well whats left of it (IMG:style_emoticons/default/wink.gif) Dude I swear our cars were separated at birth but went on to lead similar lives. I cut the exact same panel out of my Olympic Blue 914 over a year ago. Jon |
SirAndy |
Jan 25 2003, 12:49 AM
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#6
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
the black "tar" stuff is sound-dampening ...
it's usually rusted underneath after 25+ years. so removing it is a good idea! use a heat-gun to warm it up, it'll peel of in big chunks, much easier to remove :-) get rid of all the tar mats, clean the metal, put on "metal ready" than spray or brush over with por15. this will seal it off against future moisture (which you will get for sure). you can put in new tar mats on top of the por15. without the tar, the car will be noticeabley louder, especially at higher speeds. later, Andy |
SirAndy |
Jan 25 2003, 12:52 AM
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#7
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
forgot the "mandatory" pictures (IMG:style_emoticons/default/smile.gif)
before: (IMG:http://www.sirandy.com/pix/914/work/023.jpg) after: (IMG:http://www.sirandy.com/pix/914/work/046.jpg) later, Andy |
Dave Cawdrey |
Jan 25 2003, 12:57 AM
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#8
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Dumbo going poop, Daddy :) Group: Members Posts: 818 Joined: 22-January 03 From: Seattle, WA USA Member No.: 182 |
jonwatts
Its like Deja Vu (IMG:style_emoticons/default/beerchug.gif) Whats your chasis number? Sir andy DAMN (IMG:style_emoticons/default/ohmy.gif) Thats a thing of beauty!! |
SirAndy |
Jan 25 2003, 01:01 AM
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#9
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(korijo @ Jan 24 2003, 10:57 PM) jonwatts Its like Deja Vu (IMG:style_emoticons/default/beerchug.gif) Whats your chasis number? Sir andy DAMN (IMG:style_emoticons/default/ohmy.gif) Thats a thing of beauty!! yeah, and it gives me head-aches too (IMG:style_emoticons/default/smile.gif) j/k, i love my car!!!!!!!!!!! |
jonwatts |
Jan 25 2003, 01:28 AM
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#10
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no rules, just wrong Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141 |
Andy forgot to mention the added benefit of covering up interior paint that isn't the same color as the exterior (IMG:style_emoticons/default/wink.gif)
Korijo, my chassis number is 1077. If you're into numerology that means..... nothing. Jon |
Blynes |
Jan 25 2003, 06:53 AM
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#11
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Member Group: Members Posts: 68 Joined: 19-January 03 From: Savannah, GA Member No.: 169 |
Thought this might help.
I just went through the process of stripping my interior. Two tools that made it easier. 1. blaster tool made by Wurth - has rotating metal prongs that work much like a sand blaster without the mess. 2. an air powered chisel for removing black tar and seam sealer. Bill |
echocanyons |
Jan 25 2003, 10:36 AM
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#12
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Advanced Member Group: Benefactors Posts: 2,094 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California |
Havent tried it but it was suggested to use dry ice on the sound deadening material it supposedly hardened and cracks making easier to remove.
This was for 356's and I assume the material isnt much different (it doesnt look and different) On my 356 I used a putty knife and a paint/rust grinding bit worked well but sure was time consuming BTW my 57 356A was painted before the deadening material was installed. -Kelly |
tracks914 |
Jan 25 2003, 12:34 PM
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#13
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Canadian Member Group: Benefactors Posts: 2,083 Joined: 15-January 03 From: Timmins, Ontario, Canada Member No.: 153 Region Association: None |
Has anyone needed sound deadening on the firewall? Does undercoating or anything like that on the inside of the firewall help or is it even needed? I noticed one picture above "SirAndy"sprayed the firewall along with the floor. Was this just por15 or was there more?
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Chris H. |
Jan 25 2003, 01:52 PM
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#14
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Senior Member Group: Members Posts: 4,030 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
There's a very heavy rubber piece that goes on the backside of the firewall to deaden the sound. That sucker weighs a LOT. Not sure how much louder it is without it, but I know a lot of people take it out.
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SirAndy |
Jan 25 2003, 03:13 PM
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#15
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Resident German Group: Admin Posts: 41,649 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
yeah, the black stuff you see in the picture is por15. that's just to keep the moisture out. (AND cover the orange paint (IMG:style_emoticons/default/smile.gif) ) ...
i never had the rubber piece that goes into the engine compartment, but i've been in cars that do and i can say that it makes a big difference! i won't be able to have the back-padding on the inside firewall anymore because of the roll-cage, so i've been thinking about getting a rubber mat for the engine-compartment. as to the tar-mats, heating them up with a heat-gun works very well, you can then scrape it off in BIG chunks plus it doesn't leave much leftovers on the metal. once i had the tar mats out, i simply cleaned the metal with brake-cleaner. (gives you a buzz too (IMG:style_emoticons/default/rolleyes.gif) ) later, Andy |
vortrex |
Jan 25 2003, 03:44 PM
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#16
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Senior Member Group: Members Posts: 1,687 Joined: 24-December 02 From: SF, CA Member No.: 4 Region Association: None |
and if you don't have a heat gun, just use a plumbers torch. don't heat it too much, just enough to scrape it off with a putty knife in large hunks.
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tracks914 |
Jan 25 2003, 04:22 PM
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#17
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Canadian Member Group: Benefactors Posts: 2,083 Joined: 15-January 03 From: Timmins, Ontario, Canada Member No.: 153 Region Association: None |
I haven't really looked yet but can you buy precut tar mats? When installing them, do you heat them up to bond and form to the parent metal?
I've never really seen them like this before so this is new to me. |
Maine914 |
Feb 7 2003, 08:04 PM
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#18
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Member Group: Members Posts: 99 Joined: 30-January 03 From: Maine Member No.: 215 |
Tweeks has tar mats now, though I don't plan to get any. I just tore out glued on, fiber sound-deadening material underneath the carpetting. It was like a sponge. This was a CA car until last spring. Any suggestions on the best chemicals or other techniques to get the remnants of the glue off of the floor?
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vortrex |
Feb 7 2003, 08:07 PM
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#19
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Senior Member Group: Members Posts: 1,687 Joined: 24-December 02 From: SF, CA Member No.: 4 Region Association: None |
try brake cleaner.
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Mike T |
Feb 7 2003, 08:49 PM
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#20
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can't 'member Group: Members Posts: 378 Joined: 16-January 03 From: Brackney, PA Member No.: 161 |
Hey Sir Andy, how'd you get 2 pictures in the same post?
Oh, wait. I see. They're on another server somewhere. Nevermind... (IMG:style_emoticons/default/rolleyes.gif) Mike T |
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