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Allen Bolt on Rotor
Published by geterdone
09-05-2011
Allen Bolt on Rotor

Anybody have any ideas on how to remove the allen bolt on the rotor, I have been going to town on it for an hour now and can not get it to budge. PB has been soaking on it now for about an hour.
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  #1  
By SMOKE EM IF U GOT EM!! on 09-05-2011, 04:42 PM
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Are you using a key or a socket w a ratchet? I used a 3/8 ratchet w the socket and came right off.
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  #2  
By khoda355 on 09-05-2011, 04:44 PM
Don't use a key... Just saying if you are!
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  #3  
By CobraMarty on 09-05-2011, 04:48 PM
Isn't that a torx and not an allen head? I don't remember.
I used a hand held impact driver(the kind you hit with a hammer).
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  #4  
By Crusader on 09-06-2011, 09:09 AM
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Three things: Penetrating Oil, a good whack (insert the proper size allen socket w/o wrench and give a nice firm hit with a hammer), and heat. This worked on my 530i and the OEM rotors hadn't been touched for six years.
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  #5  
By raceyBMW on 09-06-2011, 02:05 PM
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They can seize up pretty good if not loctite'd....try the PB blaster for 24 hours, or like said above, give it some heat with a MAPP torch, that should get it loosened up.

Make sure your Torx/Hex is a good one, because rounding those bolts is pretty easy if not...and then you get to have some real fun trying to get it out.
Last edited by raceyBMW; 09-06-2011 at 02:11 PM.
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  #6  
By ENINTY on 09-08-2011, 10:05 PM
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So the best method is to use a "Butterfly" impact wrench with the proper Allen socket.
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  #7  
By jmedarts on 08-07-2014, 09:46 PM
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Craftsman Manual Impact Driver

One shot with a hammer, comes right off. $17.99 after I had to drill out the one I stripped

http://www.sears.com/craftsman-impac...p-00947641000P
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  #8  
By mweisdorfer on 08-16-2014, 01:12 PM
Drilling it out is the absolute last resort. You will need a cobalt bit or two. You should start with a smaller cobalt bit and work up to larger ones. Bosch makes a nice set for about $39.00.

I personally would take a torch to it before I decided to drill it out.

This is all the more reason to use synthetic grease on bolts as you put them back on the car.
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  #9  
By N8N on 08-16-2014, 01:26 PM
http://store.snapon.com/Impact-Drive...--P631500.aspx

Lisle and Craftsman are OK for a lot less money, and will likely get the job done with a B enough FH.
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  #10  
By Efthreeoh on 08-16-2014, 05:08 PM
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ALWAYS replace with new ones and use anti-seize - once you get it out
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