Wheel bolts - where to buy from?
- Thread starter Viren
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A
Anonymous
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It"s not, unless head damage
BMW.
I would not waste my money on new bolts unless there was a specific reason to replace 1 or more
If I did then I would certainly buy from BMW to guarantee the quality and avoid anything Chinese that may have entered into the food chain
If I did then I would certainly buy from BMW to guarantee the quality and avoid anything Chinese that may have entered into the food chain
Would the continous wheel on off not lead to the bolt losing some of its strength? I always use a torque wrench etc but interesting that it's not treated similar to say suspension bolts which people tend to replace.
Just a thought not saying it's something everyone must do but it is the bolt that holds the wheel to the car and must go through some pain over the years.
Just a thought not saying it's something everyone must do but it is the bolt that holds the wheel to the car and must go through some pain over the years.
I think you might have a point.
http://www.metalconsult.com/pdf/wheel_stud_bolt_failures.pdf
If you have had a tyre changed/puncture repair etc more than likely they used an impact wrench which could have exceeded the torque capacity. Cyclic metal fatigue etc
I have definitely seen steel wheel nuts damaged by impact wrenches due to over torquing.
http://www.metalconsult.com/pdf/wheel_stud_bolt_failures.pdf
If you have had a tyre changed/puncture repair etc more than likely they used an impact wrench which could have exceeded the torque capacity. Cyclic metal fatigue etc
I have definitely seen steel wheel nuts damaged by impact wrenches due to over torquing.
I read that same article on fhe web yesterday and although interesting, the fact comes down to there being millions of cars on he road and when did you ever see one with all wheel studs sheared?
Even if one did fail the remaining will easily keep the wheel on safely. My old Renaults only used to have 3 to start with...
Even if one did fail the remaining will easily keep the wheel on safely. My old Renaults only used to have 3 to start with...
wspohn said:
Have you owned your car since new?
I love this kind of response because usually with cars of this type you have the 1st owners who use them, sometimes abuse them and then trade them in after a couple of years. Then comes the second/third owners who look after them like their children. Watching over the shoulder of tyre fitters to make sure they use a torque wrench.
What I was saying is that the torque limit of the bolts might have been breached before the car was 2 years old, the bolts might have been significantly weakened. The bolts might fail 10 years down the line due to incremental metal fatigue accelerated by the initial overload (Youngs Modulus etc). At the end of the day a car is mechanical, unless you do all the work on the car yourself and even then it's practically impossible to ensure if all the bolts have been torqued up correctly.
I personally would much rather sit and have a coffee while my tyres get changed, then change the wheel bolts every few years rather than ask the tyre fitter for their certificate for their torque wrench but each to their own.
I always torque my own wheel nuts/bolts in my own shop and I make sure that the same thing happens if I take it to another shop for new tires, work, etc. I am picky about the work I do building my own race cars and I am just as picky about work any shop does on my cars. No way of knowing what treatment a used car has received, of course, and the bolts may have come to me pre-abused, as it were. All I can do is ensure that they are properly treated during my ownership, and if I detect any stretch in threads when I buy a car, I replace the bolts/studs..
If I need to have any shop I am unfamiliar with do work like this, I retorque when I get the car home.
If I need to have any shop I am unfamiliar with do work like this, I retorque when I get the car home.
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