e30 brakes not working

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E30 Zone Newbie
E30 Zone Newbie
Posts: 220
Joined: Sat Apr 04, 2015 10:00 pm
Location: Birmingham, UK

Thu Dec 06, 2018 12:58 pm

E30 M10 318I,
I had recently (long time ago, but never actually driven the car since)
Bled the brakes as I put new (rebuilt) front calipers on both sides.
Put the pedal box back in.

The brakes feel stiff when car is idling but when I start driving the pedal goes straight to the floor and barely even works.
I can hear a hissing sound when pressing them, the fluid isn't going down.

What could the problem be?
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E30 Zone Team Member
E30 Zone Team Member
Posts: 47496
Joined: Mon Jan 10, 2005 11:00 pm

Sun Dec 09, 2018 12:02 am

Hissing noise is from the servo, and is normal.
First thing I'd do is thoroughly bleed the brakes, preferably with a pressure bleeder.
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