Reference Question

m73

m73

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I have been wondering this for a while:

Are CSL frames of doors/hood/trunk made from aluminum? or is it just the skin?

If it is just the skins, then is there a risk of corrosion? (between dissimilar metals)

I have witnessed the corrosion first hand on my Series Land Rover and am just wondering if this can happen to a CSL as well.

-MF
 
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Only skin deep...

The aluminum is only the skins... underlying support structure is steel so yes, galvanic corrosion is a problem to contend with.

My panels don't show any signs of this but it would be interesting to hear from someone that does restoration body work on CSLs to find out how prevalent it is and what BMW did to seal the bonding surfaces (or not).

Forgot- door hinges are aluminum as well.

-Richard
 
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Excellent answer

Thanks for the response, it was spot on and informative.

If the doors are different metals, then BMW must have done an excellent job sealing each as I have not seen any true example of this type of corrosion.

You are also right that someone who has been restoring a CSL may provide more insight. I am curious to see a close up picture as well...maybe a UK RHD version?


MF
 
exactly my thoughts- a UK car would test the limits of corrosion resistance!
 
BMW had the wisdom to make any E9 corrode fast enough that the multi-metal is of no concern.



m73 said:
Thanks for the response, it was spot on and informative.

If the doors are different metals, then BMW must have done an excellent job sealing each as I have not seen any true example of this type of corrosion.

MF
Click to expand...
 
Sportster said:
Only the doors have steel frames. The frames of the hood/bonnet and trunk/boot are aluminum/aluminium.
Click to expand...


Thank you for this update, it seems that these old BMW's have so many hidden secrets that it pays to always purchase an original car.

-MF
 
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