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Mcgard locknuts
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02-07-2012, 02:27 PM | #1 |
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Mcgard locknuts
Just wondering if anyone has purchased these / used them and can recommend a good reliable supplier.
I think its the McGard part no: 27178 if I recall correctly. thanks
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02-07-2012, 03:24 PM | #3 |
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The BMW parts department locking nut sets are pukka Mcgards, only about 30quid from a dealers, same or less than from a regular mcgard shop.
Nice BMW box and importantly they are black like the rest of the bolts.. http://www.realoem.com/bmw/showparts...32&hg=36&fg=25 |
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02-07-2012, 04:45 PM | #5 | |
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I can recommend them but watch how much you torque them up - I started to worry I may have overdone it on one of mine when I swapped wheels the other day - no damage or drama in the end, but I had one of those - ooh 'I wonder if this is about to snap' moments.
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02-07-2012, 04:48 PM | #6 |
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You're probably aware but as and when you do get some,remember that they can snap if you over torque.
Mine are at 110nm,whereas my standard nuts are tightened to 120nm. |
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02-07-2012, 04:50 PM | #7 |
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I don't know how much they've come on these days but they used to be not much good. I'd hear that there was a very easy way to get them off.
My point being is that if someone wants your wheels that much they get them. |
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02-08-2012, 02:27 AM | #9 |
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Drives: BMW M340I G20
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My local Halfruad does them. I'd imagine all branches do?
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02-08-2012, 02:36 AM | #10 |
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Halfords do stock them, but when I looked they didn't have any black ones.
The mcgard manual says the max torque is 90nm, whereas the other bolts have to be 120nm. I was after replacing the standard splined locking bolts after one stripped, but BMW offered the Mcgards instead |
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02-08-2012, 07:15 AM | #12 | |
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Doughboy,due to what you've said,I have looked on the site,but can't find that definitive torque setting anywhere. It just says tighten to the settings as supplied in your vehicles manual... Can you pop a link up for me please as mine are at 110 at the mo and I'd prefer to get it right-cheers! |
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02-08-2012, 07:50 AM | #14 |
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I have these, got them from BMW dealer for £33 a year ago. Don't overtighten them, they do bend.......when i bent mine I managed to get them repalced under warranty, had to tell a porky that I'd used a torque wrench to 120nm (its 120 +/- 10% i believe) and they just bent too easy. I know do it properly and had no issues.
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02-08-2012, 08:33 AM | #15 | |
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BMW states 120 +/-10Nm for M12 wheel bolts and that is dry torque. |
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02-08-2012, 11:52 AM | #17 | |
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I'd never have thought about that....
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02-08-2012, 12:27 PM | #18 |
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Interestingly that's what a mechanic told me to do - never had an issue and the bolts have always come out with ease (locking and non-locking). Also a good idea to put some on the central hub - then the wheel doesn't weld itself to it. But each their own.
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02-08-2012, 01:33 PM | #19 | |
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As to the bolt threads, I reiterate that lubrication significantly amplifies the applied torque. This is not a matter of choice or conjecture, just a simple principle of physics and one that is often ignored by those who think they know better. That comment is definitely not directed at you, more at the mechanic who advised you. Nonetheless, as you say: each to their own. |
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02-08-2012, 05:01 PM | #20 | |
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02-08-2012, 08:44 PM | #21 | |
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The following is an extract from the 'Standard Aircraft Maintenance Handbook': "If a lubricant is used (for example, oil, grease, anti-sieze, Loc-Tite, etc.) a table for lubricated bolts must be used since any product that provides lubrication allows for more bolt stretch at a given torque setting, and may result in over-stretching or breaking the bolt." |
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