MOT Failure - Front Strut Nuts

Paul Morris · Jan 29, 2020

Quick question... #444 has just failed its MOT because the nuts on the top of the front struts are not “a locking type”. It’s been to the same place since I had it and they’ve never picked up on this before. No idea if I’m being jerked around.

I’m guessing that the Trophy nuts are a larger diameter than the standard 182. Anyone know if these nuts are a standard size or am I going to need to source some originals?

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Cue · Jan 29, 2020

Not 100% sure but they could be slightly larger than normal 182 ones. Am surprised if someone at some point in time has replaced them - have a look under the bonnet and post a pic up.

Paul Morris · Jan 29, 2020

Update:

Was told the wrong part. Turns out it’s the camber bolts that don’t have the locking nuts!

Will now need to source a set. Anyone have any ideas what the size/spec of the nut is?

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Cue · Jan 29, 2020

14mm iirc - go for eibach camber bolts as they provide adjustable camber.

https://eibach.com/us/search.html?q=5.81260k - they're a universal bolt so fit a range of cars like subaru, fords etc.

Paul Morris · Jan 29, 2020

Thank you, do they come with a locking nut?

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Cue · Jan 29, 2020

They're completely road legal as were standard oem on the subaru's but couldn't tell you if the nut is a locking nut - first I've heard of an MOT failure due to not having locking camber bolt nuts...

This lot supply a lot of the UK market - maybe call them and ask? https://www.larkspeed.com/index.pl

Paul Morris · Jan 29, 2020

Here’s the failure and nut in question:

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Cue · Jan 30, 2020

Just add another nut - there's enough thread, this prevents the first nut from coming loose.

Paul Morris · Jan 30, 2020

Cue said:
Just add another nut - there's enough thread, this prevents the first nut from coming loose.

Great idea... do you happen to know the correct size nut?

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Cue · Jan 30, 2020

no, unfortunately.... But knowing reno it could be anything between a 14mm and 16mm

BenG · Jan 30, 2020

I’m pretty certain that the standard nut and bolt is 14mm. I’ve got some spare which I will measure tomorrow if you like? The standard nut and bolt require a 21mm socket to fasten.
I also think the thread pitch is quite fine for a bolt of that size, and they’re strengthened.

dablk · Jan 30, 2020

Paul Morris · Jan 30, 2020

Thank you all for your help, it’s very much appreciated. I’ve got some m14 nyloc nuts arriving tomorrow. I’ve also ordered original replacement bolts and nuts from Renault to be safe!

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Philfree · Jan 31, 2020

You realize originals are not locking type either, they're just flanged nuts with a really high torque requirement, no way they'll get loose. The bolts are splined also and there's some interference fit in the struts, that's how all this makes for a secure assembly. Unless you explain this to the MOT place, replacing with originals may not change their decision as it will visually be the same used or new...

If they insist for a locking nut, yes just put 2 in place but OEM decided it was not required...

Paul Morris · Jan 31, 2020

Just picked up some originals. Looks like they have nylock thread.

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Cue · Jan 31, 2020

Yes the OEM ones are nylock...

Paul Morris · Feb 1, 2020

Back to stock... with a little helper!

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Philfree · Feb 1, 2020

sh... sorry guys I would have sworn there was no nylock...