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Thread loc question. Do bolts come pre treated?

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So just ordered some new hub bearings  as I’m rebuilding the aluminium hub carrier on my e39. 


They're mehyle ones and the bolts come with a red substance on the threads. 


These bolts need thread lock so am incorrect that these are pre-treated or is it something else?


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That will be the pre applied thread lock.


I had the same red stuff on my E60 front bearing/hub bolts.  The four bolts standing on their heads behind the hub in pic below.  Just fit them and torque them up.





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