MX5 Mirrors

[jwigglesworth]

Have had the MX5 mirrors fitted for a couple of years now but no matter what I do to the little grub screw the mirrors won't stay tight so when I get above 60 (ish!) they fold back in. Anybody got any suggestions?
Thanks,
Jeremy

[GreenV8S]

Are the grub screws actually unscrewing, or just slipping against whatever they are supposed to secure to?

[jwigglesworth]

GreenV8S said:

Are the grub screws actually unscrewing, or just slipping against whatever they are supposed to secure to?

I think it's the latter as they don't tighten any further.

[magpies]

jwigglesworth said:

GreenV8S said:

Are the grub screws actually unscrewing, or just slipping against whatever they are supposed to secure to?

I think it's the latter as they don't tighten any further.

try removing the screws and either renew or grind / file a point to the end and refit,

[v8s4me]

Mark the point where the grub-screw bites and centre punch that point. Get a drill bit with the same taper as your grub-screw and drill a very shallow hole, no more than a countersink really. The point of the grub-screw will sit the "hole"; no more slipping. Or for a more permanent fix, so long as you're sure where you want the mirror to be, drill a hole the same size as the grub-screw and wind it into the hole. Definitely no more moving

[GreenV8S]

Can't quite visualise the setup, but is it possible to remove the thing the grub screw are supposed to retain (mirror mounting pillar?) and create a small detent in the surface the grub screws are trying to engage with?

Edit: What he said.

[greymrj]

v8s4me said:

Mark the point where the grub-screw bites and centre punch that point. Get a drill bit with the same taper as your grub-screw and drill a very shallow hole, no more than a countersink really. The point of the grub-screw will sit the "hole"; no more slipping. Or for a more permanent fix, so long as you're sure where you want the mirror to be, drill a hole the same size as the grub-screw and wind it into the hole. Definitely no more moving

Makes sense to me. However I am puzzled:

I have Mk1 MX5 mirrors and I am not dependent on a grub screw? The tension is created by a spring which has a tensioning nut surely? There are so many early MX5's still running that there are kits available on ebay to restore the working parts of the assembly. I bought new stainless internals for mine. Must look and see if I have a picture somewhere.

[phillpot]

Cup point grub screws are far more effective than single point screws.


the link is just an example, have no idea what size you'd require


Knurled even better

[jwigglesworth]

Thanks for the suggestions-think the mirrors are going to have to come off for closer inspection!

[greymrj]

Worth a look at these, mine was just like this. I am pretty sure I bought stainless springs as well.

www.autolinkmx5.com/door-mirror-ss-repair-bolt-set...
http://www.mx5life.com/forum/index.php/topic/2264-...
http://www.ebay.co.uk/itm/MAZDA-MX5-DOOR-MIRROR-Re...