Can a wheel bolt torque itself more

[pvr]

Ok, got the car back now.

They tried to charge me £223 for the removal of the 4 bolts, after which I had a bit of a moment in the service department after which the bill dropped to £93. Still way too much for something that they caused ...

I checked all the bolts when I took them out tonight, not a bit of rust on any of them what so ever, I put some copper grease on them and torqued them to 130 Nm for now ...

[mogsyman]

[quote="pvr"]
Ok, got the car back now.

They tried to charge me £223 for the removal of the 4 bolts, after which I had a bit of a moment in the service department after which the bill dropped to £93. Still way too much for something that they caused ...

I checked all the bolts when I took them out tonight, not a bit of rust on any of them what so ever, I put some copper grease on them and torqued them to 130 Nm for now ...
[/quote]

130Nm  :'(

[X5Sport]

Just be careful with putting anything on them.  The Navy might, but the RAF doesn't.........I'll resist the inter-service humour  O:-)

I think the manual states 140Nm so it's the right number.  Could have been grit or another contaminant but whatever it was £93 is taking the wee wee!

[pvr]

Tiny bit of grease, tissue with a bit of grease and turning the bolt into it. Not visible as such, just a bit of an orange glow


I mean, look at this … 500 miles and on since 21st of February and coincidently had a service the day after … hmm, first time I ever had this on any car. I don't believe in coincidences ...

[grumpywurzel]

[quote="X5Sport"]
Just be careful with putting anything on them.  The Navy might, but the RAF doesn't.........I'll resist the inter-service humour  O:-)

I think the manual states 140Nm so it's the right number.  Could have been grit or another contaminant but whatever it was £93 is taking the wee wee!
[/quote]

Ex-Navy bud  , got old and broken so had to leave 

To be fair you fly boys need to be extra careful with torque settings as you don't want the adults dropping out of the sky, might ruin their dinner suits and slick back hair! Also they might get a trifle miffed if they miss Pimms o'clock 

Like I said before 20% reduction in torque has been mooted around if you are using anti seize grease. But if the dealers are mangling tools to release the old bolts then something serious has gone wrong.

[Richard137]

[quote="grumpywurzel"]
[quote="X5Sport"]
Just be careful with putting anything on them.  The Navy might, but the RAF doesn't.........I'll resist the inter-service humour  O:-)

I think the manual states 140Nm so it's the right number.  Could have been grit or another contaminant but whatever it was £93 is taking the wee wee!
[/quote]

Ex-Navy bud  , got old and broken so had to leave 

To be fair you fly boys need to be extra careful with torque settings as you don't want the adults dropping out of the sky, might ruin their dinner suits and slick back hair! Also they might get a trifle miffed if they miss Pimms o'clock 

Like I said before 20% reduction in torque has been mooted around if you are using anti seize grease. But if the dealers are mangling tools to release the old bolts then something serious has gone wrong.
[/quote]

I know what you mean about the old n broken, 19yrs in the RAF, fixing the 'little' creases in the Aircraft that the Grown up's used to collect when chasing the birds (The Feathered Variety!) lol )

[X5Sport]

) ) )

But the best bit is the RAF get to legally throw the Army out the back (sometimes we even let em have bedsheets and string to reduce the splat at the bottom).....

@pvr I don't believe in coincidences either 

[pvr]

Will wait for someone to "prove" that at an inspection, wheels are removed. Once I see that as part of a service schedule, I will go back in and query this thing again.

[Titan]

An interesting thread which I've just browsed through.
You've got me worried now as I haven't yet even tried to remove the wheels on my new toy :noexpression:
On all my previous BMWs I've had them up on axle stands, all wheels off, cleaned, waxed and refitted.
Copper grease applied to mating surfaces (where corrosive adhesion occurs) and to the wheel bolts. Torqued to 120Nm
So far I've never had a wheel fall off!
Advice heeded is to NEVER use an impact wrench on the locking nuts. I always crack all the nuts - even the normal ones - with a tommy bar first. When refitting, I don't let the impact gun rattle the torque in either preferring to let them bite then finish off by hand.
Unfortunately I suspect the only tool used by (some) dealers will be the windy gun which also doubles as an "FT" torque wrench 

[graemeX5]

Hi

I thought you were just supposed to torque the road bolts to 120 or 140 or whatever setting.

However I also thought and have been advised by various garages and mechanics the locking bolt has a lower torque as per instructions with them, as its made of a softer metal to stop it being forced whether it's the wavey pattern or spline pattern.

So it may be worth checking that before tightening as I know from my old Astra the the garage over tightened one of the locking bolts and rounded it, so it was useless after that.

[X5Sport]

And always torque/de-torque the bolts with the car fully on the ground!  I use an impact drive with a max capability of 90Nm so it can never over torque the bolts, and a good quality torque wrench.

[OrangeM5]

I had a bad experience with my M5 recently. I drive it pretty hard and the nuts can torque themselves up further.

I went through a set of rears (its only been a few months), and the locking wheel nuts basically locked themselves out of anyone being able to get them out! I had to call RAC to the tyre shop, he managed to get them out and then I went with him to get a new set of locking nuts from euro car parts (higher than OEM quality). I was very nearly going to go to the dealer for that one! Luckily only cost me £30 or so and I was sorted.

xx