Fitting upper strut brace to 2003 R53 MCS - MINI Cooper Forum

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post #1 of 9 (permalink) Old Apr 3rd, 2014, 08:38 AM Thread Starter
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Fitting upper strut brace to 2003 R53 MCS

Can anyone tell me the correct torque settings to use when replacing the 3 upper strut nuts (new ones!) after fitting a JCW strut brace?

Thanks

Spike
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post #2 of 9 (permalink) Old Apr 3rd, 2014, 09:24 AM
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I dont know on a R53 but on the Gen 2 models you have to use, so it says different nuts to standard secure it.
Gen 2 torque is 34Nm or 25ftlbs and those are M8 collar nuts
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post #3 of 9 (permalink) Old Apr 3rd, 2014, 09:40 AM Thread Starter
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Thanks, I am aware of the need to use special non-standard nuts......I've bought the strut brace secondhand from a breakers and I have asked the seller to supply the nuts that were removed from the donor vehicle (I'm hoping these are the correct nuts!) but I'm also aware that whenever you remove the struts, you are supposed to use new nuts to refit them.

The correct nuts for fitting the JCW strut brace are 40-50 for a set of six!

Any one know the correct torque settings for a Gen 1 MCS?

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post #4 of 9 (permalink) Old Apr 3rd, 2014, 10:10 AM
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If they are the same size nuts then I would have thought they would be the same torque?

Found this from an earlier post back in 2005 for a Gen1:

(34 Nm is the correct torque and oh BTW...yer supposed to NOT re-use the nuts......)

So same as Gen 2.
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post #5 of 9 (permalink) Old Apr 3rd, 2014, 10:18 AM Thread Starter
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Thanks I think I will go with 34Nm and wait and see what type/condition the nuts are supplied with the brace.

If they are standard M8 collar nuts, its got to be possible to buy 6 correct thread nuts for less than 40 ......its not as if they have the JCW logo engraved on them!!!

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post #6 of 9 (permalink) Old Apr 3rd, 2014, 10:24 AM
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That torque rating from the chart in the manual is for an M8 grade 10.9
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post #7 of 9 (permalink) Old Apr 3rd, 2014, 11:12 AM Thread Starter
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Just managed to download the correct fitting instructions from here:

MotoringFile Archive JCW Strut Brace Install How To

The torque setting is shown as 35Nm.

Also, it is interesting that the nuts shown as part of the fixing kit have a protruding collar below the flange which fits into the strut brace holes, they are also fitted with additional washers as well.

The nuts I have been supplied with don't have the protruding collar beneath the flange but do appear to match the correct nuts as available currently from Mini Sport Ltd (at 8.34 each).

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post #8 of 9 (permalink) Old Apr 3rd, 2014, 01:30 PM
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Might be worth querying with them then about the collared nut, maybe the current braces have more accurately drilled holes, ie not enlarged so they dont need the collar??
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post #9 of 9 (permalink) Old Apr 3rd, 2014, 01:54 PM Thread Starter
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Thats a good thought, thanks.

I think the reason the correct nuts have the collar beneath the flange is to extend the thread down below the surface of the brace fixing plate.

This makes a lot of sense to me as the amount of thread showing above the top of the tower is considerably reduced once you have the brace installed on top of the bolts.

I have now got what appears to be the correct part number for the nuts so I'm going to see if BMW can supply them although I don't expect them to be any cheaper!

Part No.: B51.71.7.895.241 NUT

I suspect that a lot of braces bought secondhand have been fitted using the incorrect nuts including the one I have just bought judging by the damage marks around the holes in the strut end plates.

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