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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 01-13-2011, 11:21 AM
Nick Wilkinson Nick Wilkinson is offline
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Question Clutch Pedal drops to floor. What's the problem?

I recently got into my car and the clutch pedal dropped to the floor. Their is absolutely no pressure in the system. There is fluid coming from somewhere, I can't really tell. I don't think the master cylinder or the slave are the faulty parts. Any ideas what else it could be?

The car is a 1988 BMW 325i.

I have not really done much maintenance to my car, except routine things like oil changes etc.

thanks

-Nick

Last edited by Nick Wilkinson; 01-13-2011 at 11:24 AM. Reason: left out details.
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  #2  
Old 01-13-2011, 11:30 AM
Bking Bking is offline
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On my 86 325es it was the master cylinder but i did not have a leak.

Is the leak under the dash, under the hood or under the car?
Is the reservoir filled up to the line?

Trace the leak back to the problem.
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  #3  
Old 01-13-2011, 11:33 AM
Nick Wilkinson Nick Wilkinson is offline
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The leak is coming from somewhere under the car, around the transmission. It is not dripping enough to see where it is coming from. (The problem is I don't really know a whole lot about cars.) All I have is the Haynes manual.
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  #4  
Old 01-13-2011, 11:45 AM
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hornhospital hornhospital is offline
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Why do you rule out the slave cylinder as being the problem? (It almost certainly IS the problem).
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  #5  
Old 01-13-2011, 11:49 AM
Nick Wilkinson Nick Wilkinson is offline
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Well, I guess I ruled it out because it didn't seem like fluid was leaking from there, however I could take a closer look. And, as I said before I am an amateur in the realm of vehicle maintenance.
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  #6  
Old 01-13-2011, 12:08 PM
Billwill Billwill is offline
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It is probably your master cylinder or slave cylinder.
Either one can pack up without any loss of fluid....the early E30s had a major problem with the master cylinder packing up, requiring a replacement of the master cylinder seals and a complete bleeding of the system....I had to do this a few times on my early E30s!
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  #7  
Old 01-13-2011, 12:56 PM
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Its the salve cylinder. The fluid will leak out of the little drain hole on the bottom of the bell housing. Pull the slave and push the rod in, you will know if thats the problem as soon as you do this. It will possibly just fall out also. Same thing happened to me a month or so ago. Make sure you bleed the system up towards the res. Go buy an oil can from a parts store and a 3mm hose and pump the fluid up till you see no more bubbles in the res. and its bled. GL
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  #8  
Old 01-13-2011, 05:52 PM
Nick Wilkinson Nick Wilkinson is offline
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Bleeding the slave cylinder

I just replaced the slave cylinder on my e30 and I am now trying to bleed the air out. No matter how many times I pump the clutch peddle, no pressure is built. Does anyone know how many times I have to do this? Could there be another problem?
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  #9  
Old 01-13-2011, 06:01 PM
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Try&CatchMy325 Try&CatchMy325 is offline
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It's your master Cylinder I had the same problem. Very simple to replace did it in my driveway. Don't worry about any leaks there are none I had the same thought. Just the cylinder isn't pushing fluid you're fine just replace it.
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  #10  
Old 01-13-2011, 08:32 PM
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Quote:
Originally Posted by Nick Wilkinson View Post
I just replaced the slave cylinder on my e30 and I am now trying to bleed the air out. No matter how many times I pump the clutch peddle, no pressure is built. Does anyone know how many times I have to do this? Could there be another problem?
Read my post its right before yours it answers your question.
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  #11  
Old 01-14-2011, 09:42 PM
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bimmerboy08 bimmerboy08 is offline
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just an fyi, when my master cylinder went the fluid was traveling down the line and outside the car, where it was dripping from where the hard line connects to the rubber line going to the slave cylinder.
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  #12  
Old 02-07-2013, 09:41 AM
BarranVilla BarranVilla is offline
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What is the price range to repace the master and or slave cylinders on my 325i?
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  #13  
Old 02-07-2013, 09:35 PM
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_Ethrty-Andy_ _Ethrty-Andy_ is offline
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thanks for using search button.

are you wanting to pay someone to do it as well or just to buy the parts and do it yourself? i recommend getting someone to do it, bleeding the clutch without the correct tools is a pain in the ass
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  #14  
Old 02-07-2013, 10:26 PM
Titan_Omega Titan_Omega is offline
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I had this issue and had to replace the master cylinder in the dark ......it was a pain in the butt. Good luck man if you have the time to do it, Do the research and do it its a interesting experience.
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  #15  
Old 02-08-2013, 12:28 AM
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BMWFatherFigure BMWFatherFigure is offline
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I lost track. How many thread jumpers on this? To OP - change both the master and slave. Both have been used the same number of times.
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  #16  
Old 01-01-2014, 01:27 PM
CLBrooks CLBrooks is offline
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How about OEM vs. aftermarket (Febi or Metelli) parts when it comes to slave/master cylinders? I've been told replacing small parts that are plastic with metal are the way to go.
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  #17  
Old 01-02-2014, 01:49 AM
Billwill Billwill is offline
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Quote:
Originally Posted by BMWFatherFigure View Post
I lost track. How many thread jumpers on this? To OP - change both the master and slave. Both have been used the same number of times.

This^^^^ Always replace slave and master at the same time.

If you replace a faulty master with a good new one then the slave gets pushed beyond its old working range and the seals ride on a ridge....failure of the slave cylinder soon follows.

I replaced my slave and master cylinders at the same time with cheap Pirate Parts from China...still works fine.

In SA we do not have all the options available in the USA to get good replacement parts other than OEM...which are very expensive.

Very easy to bleed the system...have a clear section of tubing placed into a glass jar with some clean fluid in the bottom. Have a helper pump the pedal a few times then leave it deppresed...at this time open and close the bleed valve on the slave cylinder.

Repeat the above while looking for new-clean fluid without bubbles to appear in the glass jar...make sure clutch/brake resevour is topped up at all times.
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  #18  
Old 01-07-2014, 06:36 AM
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Nick323 Nick323 is offline
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Billwill as you said correctly
Quote:
In SA we do not have all the options available in the USA to get good replacement parts other than OEM...which are very expensive
I bring mine in through the local FEBI agent.
Masterparts is also starting to gear up on E30 parts.
But pray why does our local stelership have to be more expensive than same in München, Birmingham or San Francisco ?
Wonder how the OZ prices compare to the rest of the world ? Do we get punished for our good weather & empty beaches...
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  #19  
Old 01-08-2014, 09:24 AM
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hornhospital hornhospital is offline
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Quote:
Originally Posted by Nick323 View Post
Do we get punished for our good weather & empty beaches...
No, you're being punished for having the coolest E30 ever built, the 333, and not sharing.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #20  
Old 01-11-2014, 01:56 AM
Billwill Billwill is offline
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Quote:
Originally Posted by hornhospital View Post
No, you're being punished for having the coolest E30 ever built, the 333, and not sharing.

I think were punished by not getting the 4 cylinder M3 E30 ever!
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  #21  
Old 01-11-2014, 03:24 PM
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_Ethrty-Andy_ _Ethrty-Andy_ is offline
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very important to replace the master and slave at the same time. its possible to do without, but you will just create lots of pressure in the system because of the new parts (which is good) though it will exaggerate the wear of any parts already starting to give way. they are only rubber seals and they do deteriorate with both use and age/time
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