Wheel Torque

[Nigel L]

Have a Fiat PVC with the 16 inch alloys on, anyone know what torque figure the wheels should be done at?

 

[Bluemanc100]

Tighten them till they shear then back them off a little...

sorry no clue... but the manual is your friend

 

[gus-lopez]

140ft/lbs off top of my head

 

[Jaws]

Just been there and done than .... 180Nm or 130 ft lb

 

[HandyAndy]

2 dugga duggas with the gun

^{_{Subscribers  do not see these advertisements}}

 

[Burgo]

Using a tyre iron a good heave until your top lip just quivers / you break wind. If you crack a sweat / draw mud then that's too much for alloys, but about right for steel rims.

 

[aria]

Just been there and done than .... 180Nm or 130 ft lb

Same here, 133 ft lb though.

 

[Nigel L]

Thanks Guys. I have been doing mine at 140Nm, so need to up the setting a little?

 

[Jaws]

Same here, 133 ft lb though.

LOL ! Believe me.. at 130 ft lbs 3ft lbs aint gonna make too much difference

 

[pappajohn]

LOL ! Believe me.. at 130 ft lbs 3ft lbs aint gonna make too much difference

Yep..... Could easily be the discrepancy between torque wrenches. They don't stay calibrated forever.

^{_{Subscribers  do not see these advertisements}}

 

[PeteH]

Yep..... Could easily be the discrepancy between torque wrenches. They don't stay calibrated forever.

And too many leave them fully "set". You should ALWAYS back the setting to Zero after use. In industry it is shown to have a marked effect on accuracy.

On the Sprinter, Alloy wheels 180Nm. Steel wheels 240Nm (From the Owner manual)

 

[Bluemanc100]

And too many leave them fully "set". You should ALWAYS back the setting to Zero after use. In industry it is shown to have a marked effect on accuracy.

On the Sprinter, Alloy wheels 180Nm. Steel wheels 240Nm (From the Owner manual)

I don’t disagree with you as that’s exactly what I was alway taught and I still do it today..

How do you explain pre-set torque wrenches however?

 

[PeteH]

How do you explain pre-set torque wrenches however?

Surprisingly I have never come across one. As my need is for a variety of uses from old Classics to new R-V`s I only have ever had Adjustable one`s.? The wheel nuts on my last R-V where in the range 350LB/ft. and I had to use a "multiplier" to get them off, and when they went back on I pulled them up by hand and then went to a local Truck Garage and borrowed theirs!.

 

[Bluemanc100]

Surprisingly I have never come across one. As my need is for a variety of uses from old Classics to new R-V`s I only have ever had Adjustable one`s.? The wheel nuts on my last R-V where in the range 350LB/ft. and I had to use a "multiplier" to get them off, and when they went back on I pulled them up by hand and then went to a local Truck Garage and borrowed theirs!.

I was a vehicle technician in the RAF so I never came across them either but my son is an aircraft engineer (RAF) and they use them, so does my customer at work who has vehicle re-manufacturing lines in the Netherlands where these pre-set wrenches are also used.

 

[Vic. Parsons.]

And too many leave them fully "set". You should ALWAYS back the setting to Zero after use. In industry it is shown to have a marked effect on accuracy.

On the Sprinter, Alloy wheels 180Nm. Steel wheels 240Nm (From the Owner manual)

I was told they need re-torquing after a 50 mile drive on Merc sprinters, after the initial torque setting to check them, is this true?

^{_{Subscribers  do not see these advertisements}}

 

[Campervan_man]

You could always put a small 'witness' paint dot on the bolts once tightened as a visual if they start to become loose you will see.

 

[PeteH]

I was told they need re-torquing after a 50 mile drive on Merc sprinters, after the initial torque setting to check them, is this true?

That is actually a standard procedure after any wheel has been removed. All the tyre fitting companies do (or should) advise to check after 50 or so miles. Many "owners manuals" do also make the same recommendation.

 

[camoyboy]

How do you explain pre-set torque wrenches however?

We used preset torque wrenches on the production line at Lotus. They were checked for calibration every week by a qualified person, or if one was dropped. The calibration equipment was checked regularly as well. Every torque wrench was logged as part of the process so they couldn't be switched around.

 

[Vipar]

Look for rusty water runs they are a sure sign of a loose wheel but only on steel wheels.

 

[Deneb]

And too many leave them fully "set". You should ALWAYS back the setting to Zero after use. In industry it is shown to have a marked effect on accuracy.

I once read a document from Norbar, who had carried out some research on this. They stated that a torque wrench should preferably be returned to less than 25% of its maximum range, but should never be returned to zero. In tests that they had carried out, they also found that leaving torque wrenches set at higher figures did not cause their accuracy to drift any further than returning them to lower settings, but it did cause the total drift to occur more quickly although over time, all of the equipment stabilised at similar figures.

^{_{Subscribers  do not see these advertisements}}

 

[PeteH]

I once read a document from Norbar, who had carried out some research on this. They stated that a torque wrench should preferably be returned to less than 25% of its maximum range, but should never be returned to zero. In tests that they had carried out, they also found that leaving torque wrenches set at higher figures did not cause their accuracy to drift any further than returning them to lower settings, but it did cause the total drift to occur more quickly although over time, all of the equipment stabilised at similar figures.

It could well be true too. But as I pre-date most of the newer thinking. I can only quote/report what was imparted to us apprentices back in the dark age, 1950/60`s, with the "threat" of instant castration if we failed to comply!.

 

[SuperMike]

Ours are 644Nm.

I was always taught you can't re torque a wheel nut, it is either done up properly or its not. The only way to check it, is to back it off and re-tighten it again.