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A blog by Z4Her in General

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72 Z Master Cylinder quandary

Z4Her

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Redoing my brake system for the first time. Got a rebuilt Master cylinder from Black Dragon & found that it:

1) had a two hole flange mount vs the original which had 4 holes

2) the collar which fits in the booster hole is ~1" deep vs 1/2" for the original, thus

3) Master Cyl will not bolt flush to the booster.

4) Dragon says that they have not had any customer issues with fit but are happy to take it back

Has anyone else observed this and do I have any options besides rebuilding or mounting the new MC w/o any spacer?

And what about the 4 vs 2 hole mounting flange?

Have had this Z since new.

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Z4Her

Solved my own "problem". Turns out that the other two holes on the master cyl flange actually come from a separate mounting spacer which looked like it was part of the MC; thus the new master cylinder fits & all is well. Been a few years since I worked on this Z so I'm learning as I go.

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  • Blog Comments

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