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      04-30-2019, 01:20 PM   #7
tux2005
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Canada
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Drives: 2017 M2
Join Date: Mar 2014
Location: Toronto, Canada

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My understanding was that when BMW switched to M14x1.25mm threaded lugs that the torque spec changed. With my 2014 228i the spec was 103lbs/ft (unfortunately not printed in the manual, I think it was in service manuals), my 2017 M2 states 101lbs/ft in the manual. I think all F-series use the M14x1.25mm thread while E-series use M12x1.5mm (exception apparently being E70 X5, they use M14x1.25mm).

The M12x1.5mm has a lower spec, I've worked on a 2000 E39 which is 88lbs/ft and a 1998 E36 which specifies 74 lbs/ft (!!! this seems really low to me so I have usually gone a little higher at 78lbs/ft).

The proper torque spec is going to depend on the thread and materials, with the M14x1.25mm I think you probably want to stay in the 100-105lbs/ft range while M12x1.5mm is 80-90lbs/ft.
Appreciate 0