Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Black Layer On 1975 Bmw '02 Floor Pans


Recommended Posts

Hi All, I'm an 02' newb. I just bought my first 02' and I'm in the process of fixing it up. There's a little rust here and there, and I've read that the floor pans are target for rust. After inspecting the interior, I noticed a layer of black tar-like stuff that seems to be pretty stuck to the floor pans. On the passenger side, there's a sheet of metal (also glued to the floors with foam over). My first thought is the last owner put this in as reinforcement due to a possible bad rust problem? Has anybody seen anything like this before?


Any idea on what this is and whether it should be removed to tackle any rust would be greatly appreciated.









Link to comment
Share on other sites

IIRC, BMW never used the foam padding or aluminum cladding shown in your first photo.  The aluminum (looks also like some modern sound deadening material) could have been a heat shield since the exhaust runs under that area--it would have been very flimsy reinforcement.  Both should pull up fairly easily.  The black sound deadening usually hides rust underneath, so most folks remove it--the preferred FAQ method seems to be dry ice (or a heat gun a distant second).  I would try to remove a bit of the black sheeting and see what the condition your floor pans are in.  If there is absolutely no rust, you would probably be safe in leaving the deadening as is (I was lucky and didn't have any rust and left mine in place).  Good luck.

Edited by nbcbird
Link to comment
Share on other sites

my 76 has the same metal sheet and deadening on the passenger side. Good to know it's not just my car... at this point that metal sheet is all thats holding my floorpan together! haha

1974 Grey European Market BMW 2002 

1976 Yellow BMW 2002 "GOLDENROD" SOLD

1972 Yellow Austin Mini 1000

A bunch of Bikes...

Link to comment
Share on other sites

Thanks everyone. There definitely is rust below the front and back passenger side of the car. It's really bad and could be very easily penetrated with a screwdriver. 


Here are the pics http://www.flickr.com/photos/11286801@N07/10676472696/in/photostream/


Was considering using a rust converter, but, I'm skeptical since I've read mixed reviews online. POR15 seems to be the popular option for many, however, I think i'd rather remove the rust completely and weld back in a panel from Walloth & Nesch.


Time to get dirty!

Link to comment
Share on other sites

Hi CJ!  Since it seems like you've already started, here's what you do for this project:


Step 1, rip out all of the old carpet and throw it away.

Step 2, to get rid of that old sound deadening, spread dry ice all over it to freeze, then whack it with a hammer to break it into pieces, which you can then just pick up and get rid of.

Step 3, patch/repair any rusty spots that you have now uncovered

Step 4, paint the entire now-bare floor with good 'ol POR-15 rust preventative paint.

Step 5, stick down some new FatMat (or similar) modern (and light weight) sound deadener.

Step 6, install fresh brand new carpet, easily obtained from Etsy here on the FAQ site!


A few pics attached, hope this helps!





Link to comment
Share on other sites

Pretty much took me one full weekend, but there wasn't a whole lot that I needed to do on the floors, just a few little fiberglass patches (quarter size or so mostly) here and there, but I didn't need to do any welding on mine.  I think that was about 15 lbs. of dry ice total, or approx. one large bucket's worth!



Link to comment
Share on other sites

I successfully removed the sound deadening material with dry ice. Tried the hair dryer alternative and I've got to say, that was way harder than the dry ice option. It took me about 15 minutes to remove a few inches with the blow dryer, and an hour to remove all of the sound deadening within an hour.


I also found plenty of rust on the floor pans on the front and back passenger pans (see pics).


I'm taking a course on how to MIG weld at http://techshop.ws/ and hopefully gain a better understanding of how much work removing this rust really is. Luckily, it's in an area that will be covered up, so maybe it's a good place to put my new skills to practice? I got plenty of work ahead of me.





Link to comment
Share on other sites

remove the rear seat and see what lies beneath.

I agree.

I also removed the sear support piece to get at the rust under the flange. Mine was butchered for speakers and quite rusty. That panel is no longer available, so if you do decide to remove it, treat it nicely so you can put it back.




(In the upper left of the last photo you can see the corner of a foam pad I found under my carpet. It has layers of foam/rubber/foam and was not glued down. I put it back after repairing the floor. Seems like effective sound dampener, assuming water is no longer an issue.)



Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

  • Create New...