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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 04-13-2017, 06:59 PM
ZAXEattack ZAXEattack is offline
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1998 Z-3 1.9 clutch problem.

My Z seems to be having a hydraulic problem with its clutch. The pedal goes to the floor with no resistance. I checked the brake reservoir for fluid the level seems normal and the break has normal pedal pressure. I watched some YouTube videos. The takeaway that I got from the videos that I reviewed was that the problem with seem to be with either the slave or Master clutch cylinder. One video showed a way to bleed the air by yourself without needing one of those devices that will do that for you. So I put the car up on jack stands crawled under and loosened and removed the master cylinder attached to the transmission. Of course leaving the hose connected. Message Sean for bleeding the system involved opening valve pressing the plunger closing the valve and releasing the plunder I didn't really get much fluid to come out by doing that and it didn't seem to bleed the system. My personal opinion is that the cylinder is bad because when I would release the plunger I would hear of what sounded like air getting around the Rubber seal that surrounds the plunger. There doesn't seem to be any fluid in the floorboard of the car as though the slave cylinder leaking. What do you guys think? As always your comments, questions, suggestions and verbal abuse are welcome

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Old 04-13-2017, 07:00 PM
ZAXEattack ZAXEattack is offline
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By the way I forgot to mention my car has roughly 97000 miles on it.

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Old 04-14-2017, 11:17 AM
1985 CCX 1985 CCX is offline
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I was suspecting that something was up with mine as well, 48,000 miles.
Seems to dive to far down to the floor, is there any mechanical adjustment on these or is it simply replace the unit?

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Old 04-14-2017, 11:42 AM
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vintage42 vintage42 is offline
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Mein Auto: 1997 BMW Z3 1.9 5MT
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Originally Posted by 1985 CCX View Post
... 48,000 miles. Seems to dive to far down to the floor, is there any mechanical adjustment on these or is it simply replace the unit?...
Neither. The old rubber line could be soft and swelling, ballooning to take up the fluid that should go the slave.
Most likely and cheapest first fix is to buy the line and replace it.
http://store.uucmotorwerks.com/stain...t-z3-p318.aspx
http://www.bimmerfest.com/forums/sho...3&postcount=12
http://www.bimmerforums.com/forum/sh...1#post27938021
I took my new line to a BMW indy shop that replaced it for $70 while I waited.
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Old 04-14-2017, 01:00 PM
1985 CCX 1985 CCX is offline
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Makes total sense, my Shelby uses braided lines and that never fails in feel.
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Old 04-15-2017, 07:09 PM
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Mein Auto: 1998 Z3 Roadster
For symptoms that bad that quick, I think you got air in the system. The clutch shares the reservoir with the brake system, but is fed much higher from the side of the reservoir than the brakes. You might have a brake fluid leak.

Of course a bad clutch master cylinder will also fail to activate the slave cylinder. I usually replace the slave cylinder when replacing the master, since you have to remove the slave cylinder to bleed it, and they both have exactly the same wear.
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