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Thread: Blue wheel bearings in Lesters 83 R100

  1. #1
    Arctic Art
    Join Date
    Oct 2010
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    Manley Hot Springs Alaska
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    140

    Blue wheel bearings in Lesters 83 R100

    I am changing out the inner spacers and shims in my Lesters for the proper preload,I have all the correct BMW parts.The bearings appear blue,must have gotten hot as the preload was/is too tight,but they look fine.Did the heat make the metal soft? Should I change out the bearings?

  2. #2
    Administrator 20774's Avatar
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    Sep 2005
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    San Antonio, TX
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    If I had any doubts about the bearings, I'd change them. Pretty critical items if you ask me.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Registered User
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    May 2012
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    VA
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    If the bearings are blue, that means the temperature of the bearings at some point exceeded 700 degrees F. That changed the metallurgical properties of the steel and softened (annealed) it some. You should plan on replacing the bearings snd inspect the wheel hub carefully at the next maintenance opportunity. Good luck!
    Stan

    AH# 13238

  4. #4
    Arctic Art
    Join Date
    Oct 2010
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    Manley Hot Springs Alaska
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    140

    Sounds good

    OK,I'll change the bearings,Thank you.

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