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How To Remove Quarter Panel Sound Deadening?


john02md
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BMW glued a sound deadening panel to the inside of square tail light quarter panels.  After 40 years, rust forms between the panel and the steel.  Eventually the rust wants to exit through a nice paint job.  Any tips on how to remove this sound material on an assembled car?  I’d like to try to stop and treat the rust before I have to resort to cutting out the rusty part of the quarter panel and repainting it?  A couple of  pinhead sized bubbles have appeared.  For now I’m pretending it’s dust in the paint.  It could be years before it’s a problem … or not. 

 

John

’74 2002 Polaris

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John, they are not sound deadening panels but are steel panels added for additional strength for the 5 mph bumpers mandated by US regulations.  That being said, they can be removed.  I removed them from my '74.  One side was already coming loose and had rust under it.  They are a real pain in the a** to remove.  They first have to be seperated from the quarter panels and the adhesive BMW used is really strong.  One side on mine wasn't too bad but the other side was really hard.  I ended up with some quarter panel damage in the area between the door jamb and wheel opening that will have to be fixed (hammer/dolly and body filler).  The panels also have to be cut up into many pieces to get them out.  I used snips, die grinders with cut off wheels, and a dremel tool.  It was not a fun job and I'm not sure I would do it now.

Steve

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Well guys, thanks for your responses.  That is in fact the panel.  Now that I know it's steel, it makes sense that rust would form between the two.  And, it makes sense that I defer this project indefinitely.  The solution is probably worse than the problem... at least now.

 

John

'74 2002

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