[W126 Coupe] Broken bolt

[Dick Spellman]

So David, seeing as how it's a front rotor, when are the rotors (brakes) 
due to be replaced?  If soon, just order them up with pads and senders 
and leave the old bolt. If the rotors are fairly new, you can do the 
repair on the vehicle only if the break is right up near the rotor or 
remove the troubled rotor set it on a bench and drill the stud out from 
the back side followed by judicious use of the extractor.  Then repack 
the outer wheel bearing, check the inner seal and replace the rotor.

Good luck and your welcome!

Dick

David King wrote:

> Mr. Spellman,

> Thanks for the info.

> It was a front left side bolt. It sheared near the head and left sharp point

> offset to one side.

> Dave

>

> David A. King, PE&LS

> A2 Maps & Surveys

> 627 Norwich Road

> Oakdale, CT 06370

> Ph. (860) 889-5905

> Fax (860) 889-5942

> http://www.A2Maps.com

> ----- Original Message ----- 

> From: "Dick Spellman" <spell.yy at verizon.net>

> To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>

> Sent: Friday, August 31, 2007 2:50 PM

> Subject: Re: [W126 Coupe] Broken bolt

>

>

>   

>> David:

>>

>> You need to run down to a Sears store and pick up a bolt extractor kit

>> of a diameter less than the wheel bolt so as to not damage the threads.

>> The kits have a drill bit followed by an extractor that will permit the

>> bolt fragments removal if done right.

>>

>> Or reassemble the wheel with just 4 bolts and torqued to factory spec of

>> 80 ft lbs only.  Run it up to a local garage and ask they remove the

>> damaged lug bolt.

>>

>> All the wheel bolts should be inspected if this happened from being on

>> there way too tight by some mechanic that used say an air tool without

>> regard for the torque.  Replace any that use the long stem with the new

>> MB bolt version available at the local MB dealer.  These extension bolts

>> on the 15 hole wheels have been done away with because they do snap and

>> represent a safety issue too.  So, if that's what you've got, get the

>> updated bolt from MB.

>>

>> Was this the front rotor or the rear wheel hub where the bolt cracked?

>>

>> Dick

>>

>> David King wrote:

>>     

>>> I need some help with a broken wheel bolt on a 1990 560 SEC.  The last

>>> 1/2 inch fractured at a nasty angle and I'm not sure what to do? Any

>>> ideas.

>>> Dave

>>> David A. King, PE&LS

>>> A2 Maps & Surveys

>>> 627 Norwich Road

>>> Oakdale, CT 06370

>>> Ph. (860) 889-5905

>>> Fax (860) 889-5942

>>> http://www.A2Maps.com

>>> ------------------------------------------------------------------------

>>>

>>> The MB Coupes Website!

>>> W126 SEC Mailing List

>>> Postings remain property of MB Coupes, L.L.C.

>>>       

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>>

>>

>>

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>>     

> 8:21 PM

>   

>>     

>

> The MB Coupes Website!

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