Broken wheel bolt - Page 5 - Mercedes-Benz Forum

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post #41 of 49 (permalink) Old 02-03-2006, 03:40 AM
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RE: Broken wheel bolt

Quote:
deathrattle - 2/2/2006 8:39 AM
.Localised heat on the bolt with a pencil flame is unlikely to tranfer much heat to the surrounding axle/brake disc which would act as an effective sink in anycase.
Some 5-th class physics reminder.
What happens to heated steel? >>> It expands.
What happens to bolt, that expanded inside the hole? >>> it gets stuck.
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post #42 of 49 (permalink) Old 02-03-2006, 09:36 AM Thread Starter
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RE: Broken wheel bolt

Well, I finally got the wheel off. Thanks for all the tips. I started off pretty bad with a 1/4" pilot hole that was about 1/8" off center. I then used progresively larger bits up to 7/16" and went through the shoulder or flange that holds the wheel. Because I was off center it still would not come off. I then used a 21/64" bit wnd came at it from an angle that weakend it enough that when i lowered the jack to put some weight on it it snapped off. the threaded piece then came out easily with only my fingers.

Thanks again to all. This is a great forum.
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post #43 of 49 (permalink) Old 02-04-2006, 12:23 AM
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RE: Broken wheel bolt

Well done dbruno [:)] - but Jeez you US guys really should go fully Metric as hearing 21/64" bit size is darn near painful.
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post #44 of 49 (permalink) Old 02-04-2006, 08:17 AM
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RE: Broken wheel bolt

Quote:
shrimpton - 2/3/2006 11:23 PM

Well done dbruno [:)] - but Jeez you US guys really should go fully Metric as hearing 21/64" bit size is darn near painful.
Well, it is slightly smaller, than 3/8 and a little bigger, than 0.320 [:o)]
Good to hear the lug problem is solved [:)]
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post #45 of 49 (permalink) Old 02-05-2006, 11:22 PM
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RE: Broken wheel bolt

Rolf is right. A larger pilot hole and a high quality "easy out" (counter clockwise threaded & slightly conical bit) should do the trick. Lisle makes a different type of easy out. Good luck, Horst K
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post #46 of 49 (permalink) Old 02-06-2006, 04:44 PM
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RE: Broken wheel bolt

if the original bolt broke, no "easy out", "majikwundersnakeoil" or other widget will help. mechanical removal will be your only solution and save you hours of frustrating work. see my previous post, it works.
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post #47 of 49 (permalink) Old 02-06-2006, 05:27 PM
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RE: Broken wheel bolt

I found a Craftsman tool at Sears that helped me with my broken lugs on the 300SEL. Craftsman calls it a "Bolt-Out". It is like a hardened socked with reverse-thread cutters on the inside. There is a size that fits OVER the broken stud that sticks out from the seat. You then place a socket that fits over the other end and attach about a six foot pipe to a breaker bar. The bolt-out cuts and threads itself into the stud and bottoms out on the seat of the lug. when it hits the seat, get two of your heaviest friends to help you jump up and down on the six foot bar, and it will break loose in about twelve seconds. Just watch you dont scratch the wheel flare with the breaker bar - you may want to wrap a towel around it [:)]. I did that on my car about 16 times when I first bought it.

07 C280 4MATIC 80k Miles
00 E430 4MATIC 74k Miles
88 260E 201k Miles
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post #48 of 49 (permalink) Old 02-06-2006, 05:30 PM
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RE: Broken wheel bolt

Quote:
Kajtek1 - 2/3/2006 5:40 AM

Quote:
deathrattle - 2/2/2006 8:39 AM
.Localised heat on the bolt with a pencil flame is unlikely to tranfer much heat to the surrounding axle/brake disc which would act as an effective sink in anycase.
Some 5-th class physics reminder.
What happens to heated steel? >>> It expands.
What happens to bolt, that expanded inside the hole? >>> it gets stuck.
You are partially correct - on a bolt stuck due to corrosion, however, all that expansion tends to free up a stuck bolt, making it much easier to remove. Any mechanic should know that.

07 C280 4MATIC 80k Miles
00 E430 4MATIC 74k Miles
88 260E 201k Miles
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post #49 of 49 (permalink) Old 02-06-2006, 05:30 PM
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RE: Broken wheel bolt

Quote:
Kajtek1 - 2/3/2006 5:40 AM

Quote:
deathrattle - 2/2/2006 8:39 AM
.Localised heat on the bolt with a pencil flame is unlikely to tranfer much heat to the surrounding axle/brake disc which would act as an effective sink in anycase.
Some 5-th class physics reminder.
What happens to heated steel? >>> It expands.
What happens to bolt, that expanded inside the hole? >>> it gets stuck.
You are partially correct - on a bolt stuck due to corrosion, however, all that expansion tends to free up a stuck bolt, making it much easier to remove. Any mechanic should know that.

07 C280 4MATIC 80k Miles
00 E430 4MATIC 74k Miles
88 260E 201k Miles
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