02-12-2021, 10:53 AM | #1 |
msej449
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Drives: M235i Convertible +LSD 2016
Join Date: Nov 2013
Location: South Coast UK & Swiss Alps
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BMW Preset Torque Wrench 14Nm [71 12 6 769 683]
I bought the BMW 140Nm preset torque wrench (part no 71 12 6 769 683 made by Hyco for BMW and a reasonable £29/$40 incl. P+P).
Not having used a preset torque wrench before, I asked my local BMW mechanic a couple of questions and he came back confirming a) Yes, it 'clicks' at the 140Nm preset (like on an adjustable wrench) b) Yes, you can use it as the sole tool for removing/refitting This is in the context of being used just to occasionally remove and refit wheels, fitting a spare after a puncture, or a re-tighten after the usual summer/winter swap. It's not meant as a mechanic's regular workshop tool, where you'd normally have an adjustable torque wrench in your toolkit. I lost a lug nut last year in rather odd circumstances where I couldn't exactly track down who had under-tightened the nut (it had a summer wheel-swap, then a service, then the annual statutory check, which picked up a nut was missing). So I wanted something where I could double-check as well. Just thought that some owners might find it useful if like me, they're not mechanics but do want something to hand in the trunk that won't over-tighten the lug nuts. I'll give it a go when the car emerges next from being coddled in a nice warm garage, as we're seeing unseasonably cold weather here in the UK at the moment (this is relative, I know: -23ºC/-9.4ºF is probably just 'brisk' for some in N. America, albeit where I live, the low was a much more balmy -7ºC/19ºF).
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2016 M235i Convertible Estoril Blue & Oyster
2023 Peugeot e-208 GT (electric) Last edited by msej449; 02-15-2021 at 05:00 AM.. |
02-12-2021, 11:17 AM | #2 | |
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02-12-2021, 01:26 PM | #3 | |
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As the Hyco's handle is a bit on the short side, I still use a breaker bar to break the lug nuts free when I'm doing seasonal wheel changes. I got used to regularly checking lug nut torque at track events and now check them every month after doing regular fluid level checks. I've had cars where a single nut would tend to loosen over time, but the M240i's nuts have always stayed where I've torqued them. That's using aftermarket studs and lug nuts, though; I have no idea how the bolts that came on the car behave as far as loosening over time goes.
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2017 M240i: 25.9K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; Full PPF |
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02-12-2021, 02:27 PM | #4 | |
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02-17-2021, 09:05 PM | #8 |
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02-18-2021, 07:55 AM | #9 | |||
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Also, keeping the handle close to parallel to the ground when applying pressure makes it pretty easy to get those last 10-15 ft. lbs. I'm old and weak, and if I don't do it that way I can't get the leverage I need.
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2017 M240i: 25.9K, 28.9 mpg, MT, Sunroof Delete, 3,432#, EB, Leather, Driving Assistance Package, Heated Front Seats | Sold: E12 530i, E24 M635CSi, E39 520i, E30 325is, E36 M3 (2)
TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; Full PPF |
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