[PurpleTT]

140nm or something wasn't it?

Winter wheels day today

Garage tidied. Got me new trolley jack, got me rubber pad thing, got me torque wrench, got me virgin stack of alloys with winters on (bought in Nov 2013!) - can't remember how tight my nuts should be. Anyone know?

Andy

[ukbeemerboy]

Originally Posted by PurpleTT

140nm or something wasn't it?

Winter wheels day today

Garage tidied. Got me new trolley jack, got me rubber pad thing, got me torque wrench, got me virgin stack of alloys with winters on (bought in Nov 2013!) - can't remember how tight my nuts should be. Anyone know?

Andy

Quick search on Google http://f30.bimmerpost.com/forums/sho...d.php?t=719250

Converted to NM around 120 but some posts say up to 140nm.

[HighlandPete]

M12 bolts on previous generation cars are 120Nm

M14 bolts, as on the F30, are 140 +/- 10Nm.

HighlandPete

[PurpleTT]

Thank you both - ok 140nm it is. Many thanks.

[Rich9600]

Hmmm, when I asked my dealer they advised 110-120Nm... I was going to set 115Nm given the 3% accuracy of most torque wrenches...

But, I may have to reconsider this...

[kitster]

My local dealer also told me 120NM

[....,,,,..,,..]

When you asked at dealers was it with a mechanic or bloke on desk / sales person etc?

It's 140nm for the Fx cars.

Admittedly it would be great if their website included stuff like this.

[Rich9600]

Originally Posted by Brigand

When you asked at dealers was it with a mechanic or bloke on desk / sales person etc?

It's 140nm for the Fx cars.

Admittedly it would be great if their website included stuff like this.

Front desk guy who went out back to ask mechanics... Or, walked away and came back at any rate... He's an actual car guy from conversations I've had with him in the past. So, disappointed at this if he is indeed incorrect.

I may set my wrench to increasing settings from 110Nm up and see at what point it actually does anything. See what they are at post factory and PDI torquing only.

[....,,,,..,,..]

How many people with torque wrenches actually calibrate them?

I had to borrow one last summer off a mate and it turned out to be well out.

[Rich9600]

I doubt most folk will calibrate domestic torque wrenches. I can't think of a means without buying specific kit. So, initial calibration only. 3% claim.

With biannual use I can't see it drifting too quickly.

[-AndyH-]

Most BMW dealers have yet to realise that new BMWs with the M14 bolts are 140NM and not 120NM. Quite amazing how they get it wrong.

[teaston]

And very importantly don't put any sort of grease, including copper grease on the bolts as it will cause over tightening!

[335dJa]

My nuts are always much tighter in winter.

[....,,,,..,,..]

Originally Posted by Rich9600

I doubt most folk will calibrate domestic torque wrenches. I can't think of a means without buying specific kit. So, initial calibration only. 3% claim.

With biannual use I can't see it drifting too quickly.

Harking back many years to my time at college as a none spotty 17 yr old.

It's just a case of measuring length in inches of the torque wrench to your hand hold point and muliplying by say 10 lbs weight hanging off emd measurement.

Pop it into a vice and adjust it see when it cracks.

Or something like that lol.

Alternatively I take it to dealer or friendly garage and have it checked

[JB14]

Why on earth is this sort of information not in the manual....!

But it is 140Nm as stated above

[teaston]

Originally Posted by 335dJa

My nuts are always much tighter in winter.

[Rxpert]

Originally Posted by JB14

Why on earth is this sort of information not in the manual....!

But it is 140Nm as stated above

+1

And coincidentally I was in the exact same boat as the OP <12hrs ago. Google confirmed M14 bolts = 140Nm.

Torqued 'em to that last night, no issues at all.

[MWA]

Originally Posted by JB14

Why on earth is this sort of information not in the manual....!

But it is 140Nm as stated above

I have never come across this all my life, always used my own judgment

[JB14]

Originally Posted by MWA

I have never come across this all my life, always used my own judgment

True and me too but seeing as though I was buying a specific long socket and needed a 3/4" drive bar to go with it I thought I may as well get a torque wrench anyway.

Therefore why not tighten to the correct torque? Seems crazy not to or should we just start guessing tyre pressures and oil types too..?

[....,,,,..,,..]

Originally Posted by MWA

I have never come across this all my life, always used my own judgment

Luckily, a lot of others use torque wrenches

Lorries, buses, aeroplanes etc

[335dJa]

Just jump on the wheel brace until it stops turning.
#oldschool

[HighlandPete]

Originally Posted by 335dJa

Just jump on the wheel brace until it stops turning.
#oldschool

Grease them up and still jump on the brace...

I had to intervene when I saw a tyre fitter misusing a torque wrench on a set of wheels. I could not believe what I saw, he was using it correctly, it clicked off... then he loaded it some more... He just looked glazed when I tried to explain he had over tightened the bolts and ruined the accuracy of his torque wrench as well.

The other thing that makes me cringe is seeing guys using a torque wrench as a breaker bar... to undo nuts or bolts. Both these misuses take a torque wrench off accurate calibration faster than anything.

HighlandPete