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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 01-28-2013, 04:42 PM
5kidsandawife 5kidsandawife is offline
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Location: Oregon
 
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Mein Auto: 1985 325e
Soft to hard brake pedal

Hello everyone. I have a question I hope someone can steer me in the right direction. I have a 1985 325e that I am in the process of bringing back to life. One of the things I am stuck on is: when I bought the car the brake pedal will pump up, but then it slowly goes down to a hard pedal. I thought maybe it had a bad booster so I replaced it. Same thing happened. Next I checked the clutch master cylinder and it was leaking a small amount. Bought a new one and a new slave cylinder, put it all back together and it still won't hold the brake pedal up. I did also put all new disc pads front and rear and did bleed the brakes. I checked around the master cylinder and all 4 wheels and nothing is leaking. My reservoir has never gone down on the fluid level, telling me there is no fluid leak. Any ideas on where to turn now? Thanks in advance.
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  #2  
Old 01-28-2013, 06:18 PM
anstead610 anstead610 is offline
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Quote:
Originally Posted by 5kidsandawife View Post
Hello everyone. I have a question I hope someone can steer me in the right direction. I have a 1985 325e that I am in the process of bringing back to life. One of the things I am stuck on is: when I bought the car the brake pedal will pump up, but then it slowly goes down to a hard pedal. I thought maybe it had a bad booster so I replaced it. Same thing happened. Next I checked the clutch master cylinder and it was leaking a small amount. Bought a new one and a new slave cylinder, put it all back together and it still won't hold the brake pedal up. I did also put all new disc pads front and rear and did bleed the brakes. I checked around the master cylinder and all 4 wheels and nothing is leaking. My reservoir has never gone down on the fluid level, telling me there is no fluid leak. Any ideas on where to turn now? Thanks in advance.
replace the lines
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This e30 is now being parted out. NO body panels are for sale, bumpers/fenders/hood/mirrors/valance or front turn signals. Everything else is up for grabs. Euro grills/cluster are sold, suspension/brakes/LSD/rear tails are already spoken for.
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  #3  
Old 01-28-2013, 07:23 PM
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hornhospital hornhospital is offline
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Mein Auto: 1995 318is / 1993 325is
^ This!
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1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
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Old 01-28-2013, 07:45 PM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
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Mein Auto: E23;E30;E38;E32;E34 +
Sounds more like an internal leak in the master cylinder to me. Rebuild or replace. May need sleeving for a rebuild depending on bore condition.
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  #5  
Old 01-29-2013, 07:06 AM
5kidsandawife 5kidsandawife is offline
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Location: Oregon
 
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Mein Auto: 1985 325e
I will order a new master cylinder. I am curious though why replace the lines? What is the reason that would be an alternative? I just like more information for future problems.
I will report back when I install the master cylinder. I live in a very small town 2 hours from the nearest part store so I do everything online. Thank you for your input.
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Old 01-29-2013, 03:40 PM
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downhiller downhiller is offline
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the brake lines from the hard lines to the caliper expand and start cracking which then could lead to a blown brake line. all 4 of them, plus is it one of those maintenance items then tend to be overlooked.
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Old 01-29-2013, 04:03 PM
5kidsandawife 5kidsandawife is offline
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Location: Oregon
 
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Mein Auto: 1985 325e
Thanks for the information.
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Old 02-01-2013, 10:37 PM
anstead610 anstead610 is offline
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Check your lines for ANY liquid. If your hard lines are all corroded, chances are some where along one of the lines, it's leaking. It could be a number of things but the lines are the first place I would check.
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This e30 is now being parted out. NO body panels are for sale, bumpers/fenders/hood/mirrors/valance or front turn signals. Everything else is up for grabs. Euro grills/cluster are sold, suspension/brakes/LSD/rear tails are already spoken for.
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