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Replacement Caliper Pistons
mistergrumpy - 4/1/07 at 07:15 PM

As above, does anyone know where I can get a new piston for a rear Sierra caliper. It looks to have been sat and the chrome has bubbled slightly right around it.

Mal - 4/1/07 at 07:42 PM

Try this company:
B G Developments
Unit 9, West Court, Buntsford Park Rd, Bromsgrove, Worcestershire B60 3DX
Tel: 01527 873716

I don't know if they will have Sierra pistons, but I have bought Cortina ones from them.


Mal

mistergrumpy - 4/1/07 at 07:46 PM

What sort of price am I looking at?

Mal - 4/1/07 at 08:01 PM

From memory about £38 for 4 pistons, but if Sierra calipers are single piston ones about half that.

Mal

mistergrumpy - 4/1/07 at 08:04 PM

Hmm. Only paid £2 for both front calipers off Ebay so I reckon I might keep an eye on there for summat similar. Only need one piston. Cheers though.

rusty nuts - 4/1/07 at 08:04 PM

Before you part with any money check out the cost of reconditioned calipers . Might be more cost effective

mistergrumpy - 4/1/07 at 08:06 PM

Just thinking of that myself. If nowt someone might sell me a piston.

cjtheman - 5/1/07 at 11:49 PM

mistergrumpy
can you take some close up pickies of the piston for me and poss some measurments
and i will see what i can do for you as i have a contact in braking industry

mistergrumpy - 6/1/07 at 08:19 PM

Absolutely. I would be very grateful. I'll jump to it after Star Trek, cheers.



[Edited on 6/1/07 by mistergrumpy]

[Edited on 6/1/07 by mistergrumpy]

[Edited on 6/1/07 by mistergrumpy]

[Edited on 6/1/07 by mistergrumpy]

mistergrumpy - 6/1/07 at 10:18 PM

Piston Head
Piston Bottom
Piston Dimensions

Note the small hole in the ridge near the top. In the bottom there is a clockwise threaded tube to twist the piston as it moves.
Cheers

[Edited on 6/1/07 by mistergrumpy]

[Edited on 6/1/07 by mistergrumpy]

MikeRJ - 7/1/07 at 04:26 PM

quote:
Originally posted by mistergrumpy
Note the small hole in the ridge near the top. In the bottom there is a clockwise threaded tube to twist the piston as it moves.


The threaded tube is not to twist the piston (the piston can't twist, there is a peg on the back of the pad to prevent this). It's part of the handbrake adjustment mechanism.

[Edited on 7/1/07 by MikeRJ]

mistergrumpy - 7/1/07 at 06:06 PM

Cheers mate. My mistake.

cjtheman - 9/1/07 at 01:21 PM

just got the info from you mistergrumpy
give me a few days and we will see what trw brake people come up with mate
cheers
colin

mistergrumpy - 9/1/07 at 03:53 PM

Any help would be much appreciated. Ta.

cjtheman - 19/1/07 at 10:01 PM

hi mrgrumpy sorry about the delay in getting back to you
the biggest rear pistons that trw do is 48mm long and 38 mm wide i got a pair of them here if you could mod your s (with a sleeve) you can have them for free i also seen in one of your other posts do you still need m18 x 1.5 fine thread nuts if so let me know
sorry again about the pistons but if you want them pistons there yours
cheers
colin

mistergrumpy - 19/1/07 at 10:11 PM

What a coincidence. I just got one this morning so I've no need but your help is more than appreciated. As for the nuts they're for a drag link as oppose to the track rod end and as such are M17 if I remember rightly but Gav's able to sort me out if he hasn't already so many thanks again its all appreciated.

Gav - 19/1/07 at 10:14 PM

Hiya Chris,

Im off to the shop tomorrow so ill pick up some nuts for you then.

[Edited on 19/1/07 by Gav]