Time to start explaining

[Lotusfab]

Nice view!

[Barrykearley]

Thanks @Lotusfab I kinda take it for granted. Lovely on clear sunny days - awful in the winter.

anyway today is sunny so i thought I’d rip some bits of

the trailing a poly bushes Inner sleeves have split away from the bush itself - @CHANGES have you seen this before?

thought I’d have a clean up and do something slightly useful instead of thumb twiddling 

[Barrykearley]

And I point blank refuse to buy now rear pins - so it’s clean up time 
 

I need to buy a bench wheel grinder 😂

anyway - these now look nice again

[Barrykearley]

This gives an idea of how bored I am 😂

[drdoom]

That cordless wire brush arrangement is a chuckle, reminds me of how one local Europa owner cobbled up a temporary water pump drive.

[Barrykearley]

So rear hubs cleaned and lacquered. Driveshafts treated to a coat of yellow paint - will lacquer them tomorrow.

Two new rear wheel bearings ordered - need to buy some new caphead bolts to fix em back on with now.

might loosely hang it all back on tomorrow.

[cbclotus]

Great work .Mr K .No stopping you .Fine looking car ......Mike

[Mightymetro]

I ended up with stainless cap heads for the m7 rear. Hub bolts.  Really difficult to get zinc plated.  If I did it again I think I might consider drilling and tapping the hub to m8 and open up the bearing holes 

[Barrykearley]

Where did you manage to find them @Mightymetro - I’m proper struggling.

ill get ringing round in a while

[Fridge]

Not sure where you intend to fit the cap bolts, but I seem to remember from restoring my S1 that all suspension bolts need to be steel. As stainless steel hasn't the same strength.

In addition, if using with an aluminium casting, they can react especially if copper grease is also used, rather than lithium.

[Barrykearley]

They are to hold the wheel bearing onto the hub. There’s 6 of them each side - M7 x 45mm.

yes you are correct @Fridge these should be steel. I will have a look and see if a plain bolt will fit later on - but I’m guessing they were the cap heads for a reason.

I cannot however find any information on how these fitted onto the old Renaults which is frustrating 

[Fridge]

1 hour ago, Barrykearley said:

They are to hold the wheel bearing onto the hub. There’s 6 of them each side - M7 x 45mm.

yes you are correct @Fridge these should be steel. I will have a look and see if a plain bolt will fit later on - but I’m guessing they were the cap heads for a reason.

I cannot however find any information on how these fitted onto the old Renaults which is frustrating 

I understand that steel cap screws have a higher tensile strength (12.9) than their normal steel equivalents (8.8).

My other S1 owing pal, @madrocket, also confirmed that stainless steel will in fact corrode alloy housings once exposed to moisture and road salt. Accelerated by the use of copper grease, it being conductive.

 

[Mightymetro]

I think they are cap head so you can access them through the hub hole ?

 

i ended up buying them on eBay 

Here’s where I got them 

https://www.gwr-fasteners.co.uk/m7-socket-cap-head-screws---303-stainless-steel-46051-p.asp

 

 

[Barrykearley]

They don’t have enough stock - and I’m not keen on stainless in this application. Got another lead on a supplier whom I will try tomorrow.

Now to look at track rod ends and top ball joints again..... as the rubbers have split.

[Fridge]

If the balljoints aren't bad I'd just buy some replacement boots.

I found these to be better than the original rubbers, which were a lot thinner.

https://www.ebay.co.uk/itm/4-UNIVERSAL-MEDIUM-LARGE-TRACK-ROD-END-BALL-JOINT-RUBBER-FREE-Clamps/253003438785?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

[Barrykearley]

Just bought new top ball joints. The track rod ends I think will be getting new rubbers - I’ll measure them tomorrow and order a pair

[fjmuurling]

How about going the titanium route?

https://www.rsrmoto.com/m7-titanium-bolts-taper-socket-cap-allen-head-10-15-20-25-30-35-40-45-50-mm/

located in the UK

[Barrykearley]

What’s titanium like in comparison to high tensile?

[fjmuurling]

this is what I found on the Racebolt website.

https://raceboltuk.com/technical-information/

Give them a call maybe they have an answer.

 

Some more info.

https://www.ti64.com/v/vspfiles/assets/docs/fasteners 101.pdf

[Fridge]

Between 8.8 and 10.9, but lighter of course.

Colin would approve of the weight saving, if not the production cost.

[sailorbob]

Titanium would not be suitable for this particular application as the tightening torque is specified as 31 - 34 Nm which would exceed the recommended maximum torque for a grade 5 titanium M7 size bolt.

[drdoom]

Isn't the purpose of torquing a fastener to create distortion in the threads, so locking the assembly? Would that be the bolt or the housing in this case? Torquing only stresses a fastener, does not increase it's strength in coping with intended loading. What is generally noted in regard to use of titanium fasteners, or engine components for that matter, is sensitivity to galling or notching. Good corrosion resistance however. 

[Chillidoggy]

1 hour ago, drdoom said:

Isn't the purpose of torquing a fastener to create distortion in the threads, so locking the assembly?

No, it’s to stretch the fastener.

[Barrykearley]

Someone give me the answer - new bearings rocked up this afternoon. I’ve now just got the OS hub to clean and recoat and I can start loosely bolting things back together. I’ve got bits strewn everywhere in a logical to Barry way.

[Fridge]

The answer is plain to see Barry. Steel cap screws, as designed.