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Master Cylinder replacement, e24 or e32?

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dmac156
Posts: 63
Joined: Tue Mar 15, 2016 3:20 am
Location: Portland, Oregon

Master Cylinder replacement, e24 or e32?

Post by dmac156 » Mon May 06, 2019 3:41 pm

I have something going on with my brakes. The brakes are not fully releasing when I let off the pedal. The condition is intermittent, and based on some threads I've read here on Big Coupe, it sounds like a common problem with the MC.

I'm going to replace the MC. I still have the original e24 calipers, and I"m not looking to do a full brake upgrade at this point. Any recommendations on going with the stock e24 or going with the e32? Based on another thread, it looks like this is the correct e32 part: 34311156643

The cost is a bit lower on the e32 part. If it's a completely plug and play situation I might go with the e32 part since it would save me a few bucks and would get set up for a future caliper upgrade. Thoughts?

wfwright2
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Location: Chesapeake, Virginia, USA

Re: Master Cylinder replacement, e24 or e32?

Post by wfwright2 » Mon May 06, 2019 9:59 pm

I did the change of the MC to the e32 one after a front brake update to e32 750 ones. The only concern noted on the various blogs at the time (10 years ago) was a reduced peddle action and some difficulty in modulating the brake action. I did not notice the problem during my ownership.

I also did the change on an 1988 535is that was my daily driver, I did not notice any ill effects with the original configuration brakes running Metal Master pads.
Wfwright2
Chesapeake, VA 23322
88 M6 Black (5/87)
07 X5 4.8l
02 X5 4.4l I killed, ignored chain rattle, 00 528iT took out by 89 t-bird
87 635csi A. Gone to new keeper, 88 535is Gone to new keeper

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JCS
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Re: Master Cylinder replacement, e24 or e32?

Post by JCS » Wed May 08, 2019 10:38 pm

Fellow Members,

I also went with the e32 M/C with the larger bore, and saw/felt no difference.
Make sure you get the early e32, as there are two styles.
The e32 was also less money.

Best,
Jay
'88 M6, Red/Tan
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http://bigcoupe.com/phpBB3/viewtopic.php?f=24&t=28245

dmac156
Posts: 63
Joined: Tue Mar 15, 2016 3:20 am
Location: Portland, Oregon

Re: Master Cylinder replacement, e24 or e32?

Post by dmac156 » Mon May 20, 2019 12:33 am

Swapped my master cylinder today. Definitely plug and play. I haven't really noticed much difference in terms of performance, but I've only driven it around the neighborhood so far. I'm glad I went with the e32 MC so I can do the full brake upgrade at some point.

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