Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Rear Spring Shackle Access?

Thanks for the photos, they help to confirm the rear valance needs to come off as I first suspected

This approach will give me all the access I need and allow me to check the security of all the bolts and Nylock nuts. In my experience Nylocks work fine where there's no movement, but on something like a damper or spring shackle where the bolt is subject to rotational forces, a Nylock will often unwind itself down the thread, Nylocks of course work on friction so they should also never be used on a lubricated thread.

For example, I found my damper bolts had been greased when my Bilsteins were fitted last year, inevitably some grease gets on the threads rendering the friction locking effect of the Nylock nut completely ineffective. After suffering constant loosening of the Nylocks on my new dampers, I replaced them with Aerotight nuts, these use undersize threaded sections on the top portion of the nut so when tightened into position the undersize section is forced outward creating high friction and a more secure 'locked' fitment.



Yes Aerotight nuts work on friction too, but I've found they work way better than Nylocks where rotational forces are present and the thread they are locking to has been greased, in addition there was enough exposed thread remaining on my damper bolts to allow me to use half nuts too, sometimes referred to as 'Jam' nuts these thinner fasteners are crammed up against my Aerotights for extra security, this combination has completely solved my issue.



My dreadful quality original MMC springs that had gone soft in just 10,000 miles were replaced with the excellent performing BCC Ant-Tramp springs at the same time the Bilsteins were fitted, so I suspect the spring bolts were also greased on assembly and Nylocks used to secure them. I've recently started to get a slight rattle from the N/S rear shackle area, so with my damper bolt experience fresh in my mind I will be removing my rear vallance this weekend to inspect and replace the Nylocks with superior Aerotights.

Can someone confirm the spring shackle bolt threads so I can source my Aerotight nuts in advance of the weekend?

Many thanks, Dave.