Welcome to the North American Subaru Impreza Owners Club Monday January 21, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 12-22-2018, 04:00 PM   #1
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default Clutch Cylinder Issues

My clutch pedal goes to the floor and stays there... sometimes.

I have a 2004 WRX with a 2006 STi 6-speed and one day I pushed my pedal in, I heard a ting kind of noise and the clutch stayed on the floor. I replaced the slave and the issue was fixed for a bit. Issue started happening again recently with the new slave.

One thing that I find odd is I can temporarily fix this by taking the IC off and pushing the clutch fork in to the slave. I hear a click when I do this, and I have a clutch again. Apparently I'm not supposed to be able to move the clutch fork? Could have fooled me with how this is.

The slave seems fine, the master isn't showing any signs of issues, the pedal linkage is all together and fine as well. I'm really hoping it's nothing inside the clutch area so any ideas what it would be?
* Registered users of the site do not see these ads.

Last edited by Kyle_B; 01-11-2019 at 03:03 PM.
Kyle_B is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-24-2018, 04:33 PM   #2
TXwrxWagon
Scooby Specialist
 
Member#: 191557
Join Date: Oct 2008
Chapter/Region: TXIC
Location: Rockwall-East DFW
Vehicle:
2004 WRX Wagon
WRB not so minty fresh

Default

If you simply rebuilt the stock slave, and it was working fine until it failed there is something missing/lost.

When I purchased a replacement slave from Rockauto the new one had a much shorter rod and I cleaned my OE rod and used it.

~Rob
TXwrxWagon is offline   Reply With Quote
Old 12-26-2018, 05:32 PM   #3
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

No when it happened the first time, I replaced the slave with a brand new one from some aftermarket OEM-esque replacement part. The second time it happened with the new slave, I rebuilt that. I looked at both pins and they are the same length. When I'm going to do tonight is use the shaft of a screwdriver, round over the ends and make it longer than the pin that came with it. Then bleed it and hope it fixes the issue. My goal is to make the pin long enough to prevent the piston from being able to come out all the way (past the rubber rings like it did before).
Kyle_B is offline   Reply With Quote
Old 12-26-2018, 05:56 PM   #4
AWD BRO
Scooby Newbie
 
Member#: 488722
Join Date: Jul 2018
Chapter/Region: MWSOC
Location: Royal Oak, MI
Vehicle:
2000 2.5rs w/EJ20K
& 2 other GCs

Default

I've had nothing but problems with aftermarket "oem replacement" slaves cylinders over the years. The all usually leak or fail in some other way.

Besides that though, it sounds like you have a problem somewhere else, possibly bad pedal adjustment?
AWD BRO is offline   Reply With Quote
Old 12-26-2018, 06:58 PM   #5
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

I agree that the issue is probably somewhere else. I'm getting a little scared that it might get really expensive.

I just swapped the extension rod to one that is longer and it did the same thing. Works for a little bit (a few pumps kind of thing) then goes to the floor. No leaks or anything so I'm starting to think transmission... The clutch fork sometimes can be moved in pretty easily (feels pretty loose when there is no slave extension arm) so I'm starting to think it might be my release bearing or something along those lines. Maybe even worse as I just watched a video of someone that had some part in their transmission break off and caused issues. That being said, sometimes the clutch fork is stiff and almost stuck in place. It's weird.

What are your thoughts? This car is going on 15 years old so I don't think I'll be dropping $2k into it to fix this issue. Probably cheaper to part it out and buy one that's a little newer. Anyway, I hope it doesn't come to that.
Kyle_B is offline   Reply With Quote
Old 12-26-2018, 07:33 PM   #6
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

To emphasis on something that might help, there is a noise that happens when it fails. It's almost like something solid is breaking and then the clutch pedal stays to the floor. So that's why I'm thinking it's something mechanical and not some leak or something. There is no leak that I can see. Not anymore at least. It's holding fluid.
Kyle_B is offline   Reply With Quote
Old 12-26-2018, 08:12 PM   #7
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

Could it be the clutch master cylinder? Please say yes... hahaha
Kyle_B is offline   Reply With Quote
Old 12-27-2018, 12:50 AM   #8
CarmelValleyWRX
Scooby Specialist
 
Member#: 453872
Join Date: Sep 2016
Vehicle:
2005 wrx wagon
48w

Default

if the piston can come all the way out of the cylinder it sounds like the throw out bearing or pressure plate is letting go. there is an automatic wire spring clip that holds the throw out into the pressure plate. maybe its coming apart.
CarmelValleyWRX is offline   Reply With Quote
Old 12-27-2018, 02:29 AM   #9
MortonCharbo
Scooby Newbie
 
Member#: 487057
Join Date: Jun 2018
Chapter/Region: BAIC
Location: California
Vehicle:
2002 WRX Wagon
PSM

Default

You said fluid is coming out of your reservoir. Is your reservoir filled to the top, or is it at or below the "maximum" line marked on the side?
MortonCharbo is offline   Reply With Quote
Old 12-27-2018, 10:50 AM   #10
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

Ya it came out pretty much all the way. It didn't fall down but I could see both rubber rings on it and thought "well that shouldn't happen..."

Is there any way to check.verify if it's something in the clutch area or if it's something external? If it's the throw out bearing, or the fork arm, or the pressure plate, or the clutch, that's all the same outcome as I'll replace all of that if I go in there for any of that. If it's external, that would really make my day but I have a feeling I'm being overly optimistic.

So the fluid that came out is not an issue. I thought it may have been but I just had it a little too full and pushed the slave piston in too far. It doesn't do that anymore, just a couple of times after I bled the system. It's at the correct level now.
Kyle_B is offline   Reply With Quote
Old 01-11-2019, 03:03 PM   #11
Kyle_B
Scooby Newbie
 
Member#: 232262
Join Date: Dec 2009
Location: Gatineau, Quebec
Vehicle:
2004 WRX

Default

Issue Fixed: I ended up taking my car to a garage because there is no way I'm taking my transmission out on my driveway when it's -20F. The issue was the release bearing wasn't installed properly and it broke some clip that holds it to my pressure plate. So since the tranny was out, and I needed a new pressure plate and release bearing, and also since the clutch wasn't installed properly or the wrong one was used, I got a new clutch kit. Feels much better now and hopefully this is the end of the issues. Also, everything I just explained was me trying to remember the wording but probably butchering it as I haven't worked on clutched in a solid 10 years so I'm a little rusty. The bottom lien is my car is back on the road and it feels good to be able to drive it again.
Kyle_B is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 04:15 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.