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Front and rear caliper rebuild part numbers?
Posted: Mon Jun 12, 2017 10:23 pm
by deags
Hi,
I am looking at rebuilding a full set of '99 NB brake calipers.
B2YD-33-26Z appears to be the kit for the front calipers, but I haven't been able to confirm that they are also suitable for the rear, and if they are not, are rebuild kits available for the rear?
Any other advice regarding rebuilding and fitting these brakes to an NA6 would be appreciated too.
Cheers
Re: Front and rear caliper rebuild part numbers?
Posted: Tue Jun 13, 2017 11:09 am
by 93_Clubman
Think that kit does just fronts:
http://www.mx5cartalk.com/forum/viewtop ... 0&p=909354But it sounds like there might be a kit that does both:
viewtopic.php?f=30&t=74569Looked earlier this year & ebay also had some kits from UK (US ebay had further kits):
https://www.ebay.com.au/sch/i.html?_fro ... sacat=9800
Re: Front and rear caliper rebuild part numbers?
Posted: Tue Jun 13, 2017 12:26 pm
by RS2000
The kits won't be the same both ends, because of different piston sizes.
Any local brake shop or brake parts supplier will supply kits
Re: Front and rear caliper rebuild part numbers?
Posted: Wed Jun 14, 2017 10:58 am
by 93_Clubman
Yeah, similarly would have thought local brake place could supply a kit, but a forumite recently seemed to have some difficulty with this:
http://www.mx5cartalk.com/forum/viewtop ... 0&p=909354
Re: Front and rear caliper rebuild part numbers?
Posted: Wed Jun 14, 2017 4:32 pm
by RS2000
You'll have no problem getting them if you accept aftermarket from MCX or Protex - just as good as seals with genuine mazda on the packet anyway.
MX5parts UK show both front & rear seal kits also.
Re: Front and rear caliper rebuild part numbers?
Posted: Fri Jun 30, 2017 2:16 pm
by deags
Thanks everyone for all your input.
The slider pins on the front were not moving well so I'm diassembling and rebuilding them and leaving the rears to minimise cost.
Has anyone rebuilt front NB8A calipers before? These dust boots won't come off and I'm hesitant to keep yanking on them because I don't want to end up with a bit of rubber stuck down there. The other ones all came off easily but these ones are different...
https://i.imgur.com/eyB6res.jpgWhile I'm at it can someone confirm that the bolts that mount the calipers to the car are the same on NA6 and NB8A calipers? I don't have all the bolts for the NB8A ones.
Re: Front and rear caliper rebuild part numbers?
Posted: Fri Jun 30, 2017 2:49 pm
by Snowmotion
I could not get the dust boots off either so just left the old ones on.
Re: Front and rear caliper rebuild part numbers?
Posted: Fri Jun 30, 2017 3:08 pm
by deags
That's my inclination but it makes getting all the old grease out of the hole that much harder - and I have shiny new ones to put on!
Re: Front and rear caliper rebuild part numbers?
Posted: Fri Jun 30, 2017 5:01 pm
by 93_Clubman
deags wrote:can someone confirm that the bolts that mount the calipers to the car are the same on NA6 and NB8A calipers?
Can't confirm, but there were a lot of shared parts, so think they are the same.
Re: Front and rear caliper rebuild part numbers?
Posted: Fri Jun 30, 2017 6:20 pm
by deags
Thanks.
Bigger problem - I've got the squate cut seals in no issue, but the piston dust boots don't fit. I tried for about 30mins to get one of the buggers on, it's a bit too big.
Has anyone got any experience with the Febest rebuild kits? I hope I am just bad at this and it can be done...
Re: Front and rear caliper rebuild part numbers?
Posted: Sat Jul 01, 2017 11:42 pm
by RS2000
deags wrote:Thanks everyone for all your input.
The slider pins on the front were not moving well so I'm diassembling and rebuilding them and leaving the rears to minimise cost.
Has anyone rebuilt front NB8A calipers before? These dust boots won't come off and I'm hesitant to keep yanking on them because I don't want to end up with a bit of rubber stuck down there. The other ones all came off easily but these ones are different...
https://i.imgur.com/eyB6res.jpg
The pin boots are one piece. Cut off the blind 'knob' end (other end to that shown on photo). You have to lube the new boot to get the knob end right thru' the caliper hole.
The piston boots are very hard to fit. Keep trying
Re: Front and rear caliper rebuild part numbers?
Posted: Sun Jul 02, 2017 10:53 am
by RS2000
RS2000 wrote:deags wrote:Thanks everyone for all your input.
The slider pins on the front were not moving well so I'm diassembling and rebuilding them and leaving the rears to minimise cost.
Has anyone rebuilt front NB8A calipers before? These dust boots won't come off and I'm hesitant to keep yanking on them because I don't want to end up with a bit of rubber stuck down there. The other ones all came off easily but these ones are different...
https://i.imgur.com/eyB6res.jpg
The pin boots are one piece. Cut off the blind 'knob' end (other end to that shown on photo). You have to lube the outside of the new boot to get the knob end right thru' the caliper bracket hole.
The piston boots are very hard to fit. Keep trying
Re: Front and rear caliper rebuild part numbers?
Posted: Sun Jul 09, 2017 2:53 pm
by deags
RS2000 wrote:RS2000 wrote:deags wrote:Thanks everyone for all your input.
The slider pins on the front were not moving well so I'm diassembling and rebuilding them and leaving the rears to minimise cost.
Has anyone rebuilt front NB8A calipers before? These dust boots won't come off and I'm hesitant to keep yanking on them because I don't want to end up with a bit of rubber stuck down there. The other ones all came off easily but these ones are different...
https://i.imgur.com/eyB6res.jpg
The pin boots are one piece. Cut off the blind 'knob' end (other end to that shown on photo). You have to lube the outside of the new boot to get the knob end right thru' the caliper bracket hole.
The piston boots are very hard to fit. Keep trying
Thanks RS for your help again.
So I had another crack... I got a pistondust boot on, but now there isn't enough room to push the piston it? I feel like it will either just rip the dust boot off or rip. I've tried putting a piston in, then the dust boot but there doesn't seem to be room to get it in the groove? This is what the manual (Page 04-11-16
http://www.mellens.net/mazda/Mazda-Miata-1999-2001.pdf) says to do though. I'll give it another go.
Regarding that tubey rubber bit... this is the kit I bought (Meant to be OEM B2YD-33-26Z equivalent)-
www.ebay.com.au/itm/0575-BJF-Genuine-Fe ... 2563255154If you search up that OEM part # they do look the same as the Febest kit. Febest list NB 98-05 as being compatible here:
https://shop.febest.eu/cylinder-kit-0575-bjf.htmlNAY5-33-26Z has the tubular rubber bits-
https://www.atkinsrotary.com/store/94-0 ... 3-26Z.htmlI think Febest have listed the wrong vehicles as compatible.
