[Healeys] Brake backing plate bolts

[Bob Spidell]

I've reused nylock nuts, adding blue threadlocker. Never an issue in 
over 100K miles.


On 5/9/2022 12:03 PM, john harper via Healeys wrote:
> Michael
>
> This reminds me of a major problem that I had with Nyloc nuts. When I 
> was working on a BN1 rear hub a well-known supplier offered me Nylocs 
> rather than the standard all-metal wheel nuts.
>
> I fitted the nuts and torqued up to the usual figure of about 65 
> pounds-feet. After some miles of running the hub extension became 
> loose and started to work through the wheel studs. I managed to stop 
> with only two studs remaining. I was lucky because I could have lost 
> the whole wheel on a busy A road.
>
> After checking I realized that using Nyloc nuts torqued to the 
> standard tightness was not right. I now, if I use them at all. fit the 
> nuts and test what torque reading is used just to turn the nut loose 
> on the wheel stud; it is about 20 pounds-feet in my case. I then 
> add this torque measurement to give about 85 pounds-feet; 20 for the 
> nut and 65 left to do the job as originally intended
>
> On Mon, 9 May 2022 at 17:02, Michael Salter <michaelsalter at gmail.com> 
> wrote:
>
>     Yep Richard according to the parts books that's correct for 6
>     cylinder cars.
>     As a matter of interest the late BN1's and BN2's ( 5 stud hub) use
>     8 plain nuts but call for only 4 spring washers?? Weird ... I'll
>     have to look into that one ... there has to be a good reason.
>
>     M
>
>     On Mon., May 9, 2022, 11:41 a.m. Ricchardd Mayor,
>     <boyracer466 at gmail.com> wrote:
>
>         Mark,
>
>         I checked another rear end yesterday that had never been apart
>         and it also has the nyloc nuts and no washers.
>
>         Richard Mayor
>         boyracer466 at gmail.com
>
>
>>         On May 7, 2022, at 6:21 PM, Michael Oritt via Healeys
>>         <healeys at autox.team.net> wrote:
>>
>>         Mark--
>>
>>         Since the bolts are not--or at least should not--be rotating
>>         you don't need lock washers.
>>         Yes, you should have flat washers under both the bolt and nut
>>         to spread the load.
>>
>>         Best--Michael Oritt
>>
>>         On Sat, May 7, 2022 at 6:27 PM Mark Donaldson via Healeys
>>         <healeys at autox.team.net> wrote:
>>
>>             Learned gentlemen,
>>
>>             When I took the backing plates off the rear axle of my
>>             ’62 BT7 race car the four bolts each side had Nyloc nuts,
>>             with lock washers underneath.
>>
>>             With the lock washer in place the top of the thread did
>>             not connect with the nylon – but it did with the washer
>>             removed.
>>
>>             The parts book shows just the bolts and nuts.  It does
>>             not show any washers.
>>
>>             As the car was built in Hayward, CA, in the mid-seventies
>>             as a track car, there is much about it which is not standard.
>>
>>             My questions are:
>>
>>              1. Are the Nyloc nuts correct and, if not, what should
>>                 be there?
>>              2. Is it correct to have no washers under the nuts?  I
>>                 would have though it correct to have at least a thin
>>                 flat washer, even though the parts book appears to
>>                 show none.
>>
>>             Mark
>>
>>             Ardmore
>>
>>             NZ
>>
>>             <image002.png>
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20220509/d6474095/attachment.htm>