Technical 1.2 8v front caliper bolt

[mattue]

Apologies if question has been answered on here previously but I cant see it anywhere. I've had a problem recently where car was sat for a few weeks and when I've gone to reverse car from drive, it stuck. On further examination, it appears to be a missing bolt from the front brake caliper (there are two - one at top and space where bottom should be) This means that when car is reversing the caliper moves and then sticks. I'm struggling to find a part number or supplier for a replacement bolt.

Can anyone point me in the right direction please? I live in Birmingham.

Cheers, Matt

 

[fingers99]

Any FIAT dealer. Or eurocarcare in Derby (Google will find). Won't cost you the earth!

 

[mattue]

Thanks fingers, have tried a few parts places but they want part number and i cant find out what it is or size of bolt etc

 

[fingers99]

Which is why I suggest FIAT. They're low cost parts. If you can remove the other one and walk to a parts place, they should be able to match it. FIAT or eurocarcare will have access to -- at least -- a copy of ePER (FIAT's part listing).

 

[atom0007]

I would go to the scrapyard for that.

Remember a bit of thread lock on those when assembling.


If all else fails, thread gauge off the other side, then check strength stamp on head, and buy suitable equivalent.

 

[benny279]

Defiantly go scrapyard for that, reason being your most likely to walk out with it for nothing. Like my case last week (I think) when I went to a scrappy not far from me to get a wheel nut when eurocarparts and FIAT dealership didn't even have one!

I said how much? Woman says "ah you can have it" me "WIN!"

So, yeah go scrappy for it!

 

[Ziggy122]

scrappies ftw they want.the cars strippes.for cash so they do it cheap and scrap the shell....

scrappies will be fine for a replacement
ziggy

 

[benny279]

Just remember to soak the bolt before fitting, when i got the wheel nut it was a bit dirty. A good ol' spray with wd40 and an old rag cleaned it right up so do the same

 

[atom0007]

Just remember to soak the bolt before fitting, when i got the wheel nut it was a bit dirty. A good ol' spray with wd40 and an old rag cleaned it right up so do the same

Wd40 and threw lock don't mix. Clean it with a wire brush, or degrease it
Properly after wd40

 

[benny279]

Wd40 and threw lock don't mix. Clean it with a wire brush, or degrease it
Properly after wd40

Oops, thought I missed that part out...but yeah I used a wire brush sorry it's called that time of the night where I'm not thinking detail

 

[Ziggy122]

i dont use a wire brush - too much effort

Stick a Wire wheel into the drill - turn it on - work with the threads and clean all that gunk, rust and crap out

Ziggy

 

[fingers99]

Plated, so won't be higher tensile than 8.8.

We're talking about a fiver or so for a pair, fastener specialist will match to pattern, maybe a motor factor.

 

[Ziggy122]

Found the bolts i believe on the EPER
Its under braking - front brakes - then version appropriate (1.2 8v)
It saying they are like 50p sumet

So expect it to be like £1 now

Ziggy

 

[atom0007]

Plated, so won't be higher tensile than 8.8.
.

You can get higher strength plated bolts. I use 12.9 bzp at work

 

[fingers99]

Really? Plating is supposed to embrittle them (one reason head bolts are always black finish). If the Engineer's Union finds out about this, there will be war! Wonder if the silver is really plating, though?

 

[paulwells]

Hi when i did my stilo brakes i needed 2 bolts for caliper too so i used big red calipers there email is www.biggred.co.uk or telephone 01905 428793 these were spot on right strength and come with threadlock on and recieved next day and they match the correct 1 for your reg paul

 

[atom0007]

Really? Plating is supposed to embrittle them (one reason head bolts are always black finish). If the Engineer's Union finds out about this, there will be war! Wonder if the silver is really plating, though?

http://www.westfieldfasteners.co.uk/BZP-12.9_ScrewBolt_SHCap_M6.html

Is an example. Definitely bzp....I specify, buy them, hold in hand, check strength stamp

 

[fingers99]

A quick Google seems to confirm that DIN 912 (not 9.12) is ISO 8.8!

Is there a real engineer in the house?

 

[fingers99]

A quick Google seems to confirm that DIN 912 (not 9.12) is ISO 8.8!

Is there a real engineer in the house?

Looking again at their listings, seems they only have cap heads ("allen screws") in that tensile. Now very confused.

Time for bed.:bang:

 

[atom0007]

Apologies to the OP for thread hijack!

Let me try to clarify

ISO 4762 is a standard that specifices cap head bolts. In Germany (and more widely now) the standard is referred to as DIN 912. In Britain, it is BS EN 4762.

So if you search for DIN 912 bolts, you'll find allen bolts that conform to this standard.

In contrast, BS EN 4017 (equivalent to as DIN 933) covers hexagon head bolts
If you search for 4017 high tensile bolts, you can find for example:
http://astm-asme.com/din_933__iso_4017_bzp_finish_cr3_grade_88_hex_head_screw

Don't confuse strength classes with ISO doc numbers.

Back to the original contention:
1. There are high strength (more than 8.8) zinc plated fasteners available.
2. Plating can cause hydrogen embrittlement, but this is nullified by simple bake out after plating to diffuse the hydrogen out of the metal.

So it really comes down to economics / aesthetics as far as I can see.
Very high strength BZP fasteners are not all that common, black phosphate finish is more readily available, but this has relatively poor rust resistance.

As an aside, impact sockets are black because they are made of (more expensive alloy) higher ductility steel, and the Chrome plating used on standard (less expensive alloy) steel would chip / crack. And it makes them easy to identify, which is handy.

Hopefully this will prevent Engineer War