PDA

View Full Version : lug bolt

clyde
10-16-2003, 11:27 PM
Sent to me by a colleague:
He was rotating her tires. She does not have the sports package [on her 2001 330i]. He set the torque wrench for 85 pounds. As he was tighting this particular lug nut, it seemed loose and was not griping. He backed it out and found it stretched out as seen from the pics.

Also he said BMW manual recommended 74 pounds of torque.


http://www.lawair.com/bmw/bolt-2.jpg

http://www.lawair.com/bmw/bolt-1.jpg
mquetel
10-16-2003, 11:31 PM
I'm not really sure what I'm looking at there... do you think it was defective and cast that way or worn down some how. Whatever caused that, it does not look good. :(
clyde
10-16-2003, 11:36 PM
I'm not really sure what I'm looking at there... do you think it was defective and cast that way or worn down some how. Whatever caused that, it does not look good. :(

I understand that it looked fine when it came out for the wheel removal, so... :?
SpaceMonk
10-16-2003, 11:39 PM
I'm not really sure what I'm looking at there... do you think it was defective and cast that way or worn down some how. Whatever caused that, it does not look good. :(

I understand that it looked fine when it came out for the wheel removal, so... :?
:? But wasn't there a TSB that changed the torque settings to ~88, superceding the old 74 ft. lbs. in the manual?
Nick M3
10-16-2003, 11:39 PM
Yep, changed to 88.
clyde
10-16-2003, 11:42 PM
I'm not really sure what I'm looking at there... do you think it was defective and cast that way or worn down some how. Whatever caused that, it does not look good. :(

I understand that it looked fine when it came out for the wheel removal, so... :?
:? But wasn't there a TSB that changed the torque settings to ~88, superceding the old 74 ft. lbs. in the manual?

Yeah, but he had the wrench set to 85, so that's not the issue with this bolt.
SpaceMonk
10-16-2003, 11:45 PM
Yeah, but he had the wrench set to 85, so that's not the issue with this bolt.

So mentioning that the owner's manual said 74 pounds was a red herring? :lol: ;)
Nick M3
10-16-2003, 11:46 PM
yep!
clyde
10-16-2003, 11:50 PM
Yeah, but he had the wrench set to 85, so that's not the issue with this bolt.

So mentioning that the owner's manual said 74 pounds was a red herring? :lol: ;)

sure. :)
GSR13
10-17-2003, 12:05 AM
Is it simply possible the Torque Wrench was not calibrated properly? I would think that it would cause damage to the bolt, but not necessarily like that.

That almost looks like the end of the bolt hit a wall and he kept tightening, causing the bolt to twist in the middle. The change of shape would likely cause the loose feeling. Of course, this is all just guess work, but obviously something went wrong.

I have torqued all the lug bolts on the E46 and the Z3 at 88 lbs. each time and there is never a problem.
Nick M3
10-17-2003, 12:08 AM
It looks like a defective bolt to me.

You'd have to work pretty hard to over torque a bolt like that.
nate
10-17-2003, 12:36 AM
It looks like a defective bolt to me.

You'd have to work pretty hard to over torque a bolt like that.3500lb/ft :cool:
dredmo
10-17-2003, 12:48 AM
It looks like a defective bolt to me.

You'd have to work pretty hard to over torque a bolt like that.3500lb/ft :cool: :lol:

Seriously though, I have to work around torque wrenches all the time. is it possible the wrench used was dropped or defective? If not, I'd say a defective bolt.

That is just wrong!
kognito
10-17-2003, 08:33 AM
It looks like a defective bolt to me.

You'd have to work pretty hard to over torque a bolt like that.3500lb/ft :cool: :lol:

Seriously though, I have to work around torque wrenches all the time. is it possible the wrench used was dropped or defective? If not, I'd say a defective bolt.

That is just wrong!

Ditto, looks like metal fatique, or bad metal. At least there was no damage to the hub. (was there??)
bren
10-17-2003, 08:49 AM
I like the government issue pen :lol:
clyde
10-17-2003, 09:01 AM
At least there was no damage to the hub. (was there??)

I don't know.
The HACK
10-17-2003, 01:44 PM
That thing looks like my suspension bolts when I over-tightened it.

My guess is it either got cross-threaded.
Roadstergal
10-17-2003, 01:54 PM
My guess is it either got cross-threaded.

or... ?
The HACK
10-17-2003, 01:56 PM
My guess is it either got cross-threaded.

or... ?

Or I lost my train of thought. :?

Sorry, can't remember what I was going to comment on now. :(
dredmo
10-17-2003, 02:02 PM
My guess is it either got cross-threaded.

or... ?

Or I lost my train of thought. :?

Sorry, can't remember what I was going to comment on now. :(

:lol:
alrighty then. :mad:
clyde
10-17-2003, 02:08 PM
My guess is it either got cross-threaded.

or... ?

Or I lost my train of thought. :?

Or ran out of talent before finishing the post?

"Haha! Pwnz Ju!" :twisted:
The HACK
10-17-2003, 02:36 PM
D'oh! What goes around I guess.

Got Pwnzed? (like got milk?)