Quote:
Originally Posted by DietTab
lol @ whoever said the bolts are aluminium. ... The bolts are high carbon steel (read: stiff and light)
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I encourage anyone who believes this post to spend 3 minutes googling the density of aluminum and steel alloys. *Sigh* This is completely wrong information. DietTab, feel free to post the density numbers you found. I found ~7800 kg/m^3 (roughly) for pretty much every steel alloy, and ~2750 for all Aluminum alloys. They're not even close, and "high carbon" has pretty much nothing to do with it.
Yes, AL and steel don't play together well unless the bolt is coated. As I alluded to in another post, that seems a likely reason why BMW would say to replace the bolts.
By all means, replace them. They're only $5-6 a pop plus shipping.