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Car Forum / BMW Cars / June 2005Discoloration on V12 motors
I've begun research on a possible purchase of a BMW 850Ci, and I've noticed a bronze-discoloration visible on BMW motors that I do not see on photos of some Mercedes V12s. Is this due to overheating, or is it normal? Thanks! Pictures: BMW <http://www.mrdos.com/IJB/1991BMW850iV12.jpg> MB <http://www.mrdos.com/IJB/1994MBS600V12.jpg> > I've begun research on a possible purchase of a BMW 850Ci, and I've > noticed a bronze-discoloration visible on BMW motors that I do not see > on photos of some Mercedes V12s. Is this due to overheating, or is it > normal? Probably just cosmoline, BMW put it on some parts to protect them. Zymol do a special fluid to remove cosmoline if it bothers you.  SignatureWho needs a life when you've got Unix? :-) Email: john@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage! Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html Either that or someone clearcoated the motor to make it look new for easy selling. and then it turned due to heat. >> I've begun research on a possible purchase of a BMW 850Ci, and I've >> noticed a bronze-discoloration visible on BMW motors that I do not see [quoted text clipped - 3 lines] > Probably just cosmoline, BMW put it on some parts to protect them. Zymol > do a special fluid to remove cosmoline if it bothers you. > Either that or someone clearcoated the motor to make it look new for easy > selling. and then it turned due to heat. [quoted text clipped - 6 lines] >>Probably just cosmoline, BMW put it on some parts to protect them. Zymol >>do a special fluid to remove cosmoline if it bothers you. No, John's right, it's cosmoline. It appears on almost every 12 cylinder BMW engine that you'll ever see... -Fred W Wow, thanks for the quick replies! What the engine looks like does not particularly concern me; I just want to be as educated as possible. Now should I believe the folks that say that I should budget $100/month or $500/month to maintain an older 850Ci? LOL > Wow, thanks for the quick replies! What the engine looks like does not > particularly concern me; I just want to be as educated as possible. > Now should I believe the folks that say that I should budget $100/month > or $500/month to maintain an older 850Ci? LOL Averaged out over a year, I'd say that $500/mth was a pretty realistic *minimum*! JB
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