E28/M3 Calipers...

Post Thu Aug 24, 2006 12:00 am

Which model e28 did the e30m3 get its calipers from? 535? One of mine has a knackered seal and the piston has corroded so need to replace it for now...

Post Thu Aug 24, 2006 11:48 am

Post Thu Aug 24, 2006 6:19 pm

It looks like they shared the carrier but not the caliper it self ?

carrier

http://img144.imageshack.us/img144/8936/c1oa4.jpg

caliper

http://img165.imageshack.us/img165/5581/c2ha0.jpg

Post Thu Aug 24, 2006 7:25 pm

Doh!! Sure they were the same.. Erm.. Re think then in that case

Post Thu Aug 24, 2006 7:45 pm

Its says in the e30 bible that the m3 caliper is shared with the 81-88 5 series doesnt say what engine size.

Post Thu Aug 24, 2006 7:50 pm

That is what i thought.. need to confirm tho!

Post Fri Aug 25, 2006 9:49 am

Check realoem.com, but I'm fairly sure that all E28s other than the M5 have exactly the same brake components and the E30 M3 is the same as those....

Post Fri Aug 25, 2006 10:08 am

Actually, after a quick check, it appears that the part numbers for the front calipers, at least, are totally different....Both, however, are NLA

But I believe the repair kits are available for M3 calipers and not too expensive from the dealers, either.

Unless the piston is so bad that it can't be resucitated, then just get the rubber seal kit, strip it down and clean the piston up using Brasso, or similar, rinse very well in petrol or parrafin and reassemble when totally dry.

I've never, yet, had to scrap a piston in a caliper that works (had a few calipers with snapped off bleed nipples and such that are rubbish, though)...and I've done quite a few including a pair on an old Sunbeam Alpine that had been standing for 12years untouched!