Sheared wheel bolt - what is this called?

[craigdiver]

Hi all,

My 126 came with 4 soft as s#!te locking wheel bolts (with no key). First one I tried (O/S REAR) to remove sheared. Had a go with an easy-out but drilled off-centre and also well and truly welded in with galling. Think will need a new hub (as per photo below). What is the part called I need to replace that takes the wheel bolts?

[Gadge]

Here you go 

http://webshop.fiat500126.com/katalog/artikelinfo/2978/wheel_hub_axle_stub_rear?lang=en

[1973/126]

 Do you need both the rear hubs, or just one?
 I can have a look in my shed to see what I`ve got.

[craigdiver]

Do you need both the rear hubs, or just one?
 I can have a look in my shed to see what I`ve got.

Think just the one as if another shears ill give it to a professional to remove the sheared part with heat etc.

If you have one please let me know how much you want for it and ill arrange the carriage.

Cheers 👍🏻

Craig

[craigdiver]

Is it worth buying the Haynes Fiat 126 Haynes 1973-77 manual? How mechanically  similiar is my 1999 aircooled ELX to the original aircooled cars?

[1973/126]

 No problem, I`ll have a look laters and let you know. I`ve got few rear suspension arms in the shed, so shouldn`t be a problem.
 It`s definitely worth buying a Haynes manual, or there should be one somewhere on the forum if you are a subscriber

[andyzeetec]

If you havent gone into the thread, it might be worth having a go at the remains of the bolt with a center punch and hammer tapping it round and out.

[ChrisRLewis]

Perhaps (if the thread is not damaged), put the brake drum back on and then try drilling the broken stud out, start with a drill the same diameter as the brake drum hole just to find the centre, and then work up in drill sizes..

[craigdiver]

If you havent gone into the thread, it might be worth having a go at the remains of the bolt with a center punch and hammer tapping it round and out.

Hi Andy, quite a bit of experience of stubborn fasteners and this one appears to be a pig, not helped by me drilling the hole off-centre for the easy out. Had a go with the punch but stud very soft and not going anywhere easily

[craigdiver]

Perhaps (if the thread is not damaged), put the brake drum back on and then try drilling the broken stud out, start with a drill the same diameter as the brake drum hole just to find the centre, and then work up in drill sizes..

Chris, this is great advice that I wished I had had before I started! Think this one is beyond it though.

Cheers 👍🏻

[craigdiver]

AND, I have a feeling when I try to remove the locking bolts from the other three wheels they will shear too 😳

[Bambino126]

Could it be Heli-coiled?

[craigdiver]

Could it be Heli-coiled?

Not keen on heli-coiling wheel bolts (or using helicoils in general!) as not a blind hole and difficult to see if it is seated correctly and not screwed through the hole.

Thanks for the input anyway 👍🏻😀

[ChrisRLewis]

You could always fill the hole with weld and then re-thread. It may be worth checking if your aftermarket locking wheel studs are the correct thread pitch, I think Fiat used two different thread pitches on 126 wheel studs..?

[Rusty's Uncle]

Those locking wheel bolts really do work then  but I guess that it is the unlocking bit that is the problem.
You must have got enough purchase on the bolt to shear it. Have you tried the other bolts? I think that you are wasting your time with so called easy outs because of the forces involved.