Torque Wrench settings for lugnuts?
MBWorld Fanatic!
Joined: Nov 2001
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From: Ashburn, VA
'19 GLC 300, '19 TM3SR+
80 ft*lbs (110 Nm). This is described in the manual. Also, they are lug bolts, not nuts.
Most people who care about their wheels do use a torque wrench. On a general note, it is a good practice to use a torque wrench on any fastener per MB specs. Torque settings can be found in WIS.
Most people who care about their wheels do use a torque wrench. On a general note, it is a good practice to use a torque wrench on any fastener per MB specs. Torque settings can be found in WIS.
Last edited by vadim; Dec 29, 2004 at 02:47 PM.
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Joined: Jan 2005
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From: Orange County
2005 C Wagon (No snickering please!)
There is a technique to apply the proper stretch to the wheel bolts. Setting a torque wrench to 80 ft-lbs, and going in a circle around the wheel will not result in all fasteners having the same stretch, and it will not be 80 ft-lbs! For wheel bolts I always use anti-sieze compound to prevent rust and corrision AND lubrication required so that friction between the thread faces does not cause the wrench to "click" before the correct amount of stretch is reached. First you must tighten in at least two stages. The first stage is to set the wrench to 75% of the final value, or in the case of the wheels, 60 ft-lbs. Tighten each bolt in a criss cross pattern, Then set the wrench to the final value, 80 ft-lbs, and follow the same pattern. Only let the wrench click once, resist the temptation to click it again, that just abuses the tool and might cause the bolt to turn a bit more.
A properly tightened wheel bolt will keep your wheel flat, and keep you from losing or breaking a bolt. Anti-sieze compound will make it easy to rotate your tires, cause the bolts won't be rusted fast to the rotor!
A properly tightened wheel bolt will keep your wheel flat, and keep you from losing or breaking a bolt. Anti-sieze compound will make it easy to rotate your tires, cause the bolts won't be rusted fast to the rotor!
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Joined: Sep 2004
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There's no need for anti-seize on Mercedes wheel bolts.
These bolts come spec'd with a Dacromet coating to prevent corrosion.
You can read about the coating here www.dacromet.com.
If you're using longer or shorter bolts due to aftermarket wheels, we carry RAD bolts which feature the same dacromet coating.
These bolts come spec'd with a Dacromet coating to prevent corrosion.
You can read about the coating here www.dacromet.com.
If you're using longer or shorter bolts due to aftermarket wheels, we carry RAD bolts which feature the same dacromet coating.
MBWorld Fanatic!
Joined: Jan 2005
Posts: 2,848
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From: Orange County
2005 C Wagon (No snickering please!)
This Dacromet process is an excellent alternative to plating because it is more "green" friendly, and if the surface of the bolt is prepared correctly, hydrogen embrittlement can be avoided. One version of the process, used in my shop, adds lubrication to the fastener so torque readings are not influenced by undesireable thread friction.
The reason for coating steel parts is to protect them during manufacturing, transport, and storage prior to use in an assembly. In the real world a 10 micrometer thick coating does not last very long if the fastener is removed and reinstalled often, or subjected to large changes in temperature.
New bolts? Anti-sieze is not necessary. A person buying new bolts for after-market wheels can skip this step.
Used bolts? If there is just a speck of rust or corrosion on the bolt or the female threads, I'd use anti-sieze. Its economical too, a can lasts about as long as a bottle of tobasco sauce, 20 years for some families.
The reason for coating steel parts is to protect them during manufacturing, transport, and storage prior to use in an assembly. In the real world a 10 micrometer thick coating does not last very long if the fastener is removed and reinstalled often, or subjected to large changes in temperature.
New bolts? Anti-sieze is not necessary. A person buying new bolts for after-market wheels can skip this step.
Used bolts? If there is just a speck of rust or corrosion on the bolt or the female threads, I'd use anti-sieze. Its economical too, a can lasts about as long as a bottle of tobasco sauce, 20 years for some families.
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Joined: May 2002
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From: The blue white rock, third out.
2002 C230 Coupe(M111)
Anti Seize compound on lug nuts or bolts can result in a warped tire or rotor...
Actually, coatings on fasteners are for a wide variety of reasons. Some manufactures have a concern about undo corrosion, so the fastner must survive a long duration salt spray, some have cosmetic concerns, prelube, etc...
Actually, coatings on fasteners are for a wide variety of reasons. Some manufactures have a concern about undo corrosion, so the fastner must survive a long duration salt spray, some have cosmetic concerns, prelube, etc...
