audiohs

I am putting together a brake upgrade kit consisting of the Porsche 986 Boxster caliper with A8 rotors for my B5 A4. I have one brand new Boxster caliper and one used. I was thinking that maybe I should service the used caliper before installing it. Is there such thing as a caliper rebuild kit for this caliper? I didn't find anything in my search. If there is, what exactly is involved in servicing the caliper?

If there isn't a kit, what can I do to ensure that the used caliper is in good working order?

Thanks in advance.

qfrog Ti20

give them the part number for the used caliper you have.... request a caliper seal rebuild kit. They might have such a thing in their catalogue.

Alpha7

I just order some from PelicanParts.com. the boxster caliper takes 40mm front and 36mm rear seals. ~$8.65/pr

audiohs

My dealer wants $30/pair (CAD) for the 36mm and $40/pair for the 40mm. I may just order them from Pelican Parts now. Do you have the part # handy?

Alpha7

special order parts for my dad have the order on hold for now...

part numbers are:
R-351-917-01 (40mm seal kit)
R-351-917-00 (36mm seal kit)

<a href="https://forums.audiworld.com/s4/msgs/1841962.phtml">
I'm planning to follow this write-up as a guide</a><ul><li><a href="http://www.pelicanparts.com/catalog/shopcart/996M/POR_996M_brakes_pg4.htm#item24">last items on the page</a></li></ul>

ryoung

Only the dust boots are replaced in the Stoptech post, but the piston seals are the critical item. Note that my Alcon's don't even have dust boots, but the calipers have been trouble-free in the salty Northeast for four years.
<img src="http://pictureposter.audiworld.com/17157/alconta6_a.jpg">

ryoung

Is the dust boot is in good shape? If yes, the caliper has probably never seen the track.

Is the caliper less than 4 years old? If yes, the brake fluid never had a chance to pick up moisture even if the fluid was never changed. If the fluid picks up moisture, it will get acidic, and corrosion of the piston bores will increase bore roughness ... not good for seal life.

If you can answer yes to both question, I wouldn't hesitate to install the used caliper as-is. If not, I'd definitely rebuild it.

Alpha7

from the part description I think/hope both.

"For those up to the task, we offer front and rear caliper piston Seal Kits. One kit includes 2 dust boots, enough for either the upper or the lower pistons on one 4-piston Boxster brake caliper."

I haven't torn into the calipers before so I'm not 100% sure. but now I see HRP has Brembo <a href="http://www.hrpworld.com/index.cfm?form_prod_id=537,169,49,363_701&action=p roduct">caliper seals </a>that look different. hmmm????? looks like I may need to place another order.

Philscbx

http://www.diyautoparts.com/index.cfm

audiohs

Both to Pelican Parts and the post on the Stoptechs. It doesn't look all that hard to do. *crossing fingers* I didn't know that you are able to pry the piston out like that.