E34 front brake caliper questions: solid 520i vs ventilated 525i

[ktteoh]

folks, my car is a 520i and i have a set of 525i caliper+disc sitting around. now that my front disc has worn to a lip - i'm planning to fit the 525i parts. the caliper consist of 2 parts: - (1) the one holding the piston body - (2) the other [sliding] portion my 525i part (1) is not as good as my old 520i (1). so i was wondering whether can i mix 520i part (1) with 525i part (2) - will it work?

 

[wan520i]

you meant you want to use 520 piston on 525 caliper?

 

[ktteoh]

not really. let me try again. every caliper [whether 520 or 525] has 2 parts: part (1) one which house the piston part (2) one which is like a back plate that slides against (1) i want to know whether part (1) from a 520i caliper set can be connected with part (2) from a 525i caliper set.

 

[morpheus5039]

You mean Part 2 or Part 3 not good? What kind of not good u mean? Pictures?


The ventilated disc on 525i is thicker. i don't think you can fit the disc with mix and match caliper housing and brake carrier since the part numbers are totally different.

Try searching the parts number at www.realoem.com

520i:
02 Caliper housing left ATE 1 34111160361
02 CALIPER HOUSING RIGHT ATE 1 34111160362
03 BRAKE CARRIER ATE 2 34111160360

525i:
02 Caliper housing left ATE 1 34111160367
02 CALIPER HOUSING RIGHT ATE 1 34111160368
03 BRAKE CARRIER ATE 2 34111160366

 

[tehyw]

hi guys, i currently got a e34 540 break disc and caliper. does anyone know what modification i need to get it fitted onto my e34, 91 non face-lift? TQ.

 

[morpheus5039]

hi guys, i currently got a e34 540 break disc and caliper. does anyone know what modification i need to get it fitted onto my e34, 91 non face-lift? TQ.

plug and play.

 

[tehyw]

plug and play.

h, i took the kit to the workshop, and my mechanic said it wont fit the holes are not aligned... and that its better not to modify the bracket... TQ

 

[morpheus5039]

h, i took the kit to the workshop, and my mechanic said it wont fit the holes are not aligned... and that its better not to modify the bracket... TQ

your car is E34 right? you need the brake carrier from the e34 540i.

http://www.bmwe34.net/Wiki/tiki-index.php?page=Brake+upgrades

 

[morpheus5039]

By the way, best and cheap upgrade is to change to double servo brake pump from E34 or E32.