The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

Master/Slave Cylinder Problem?

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

SeeYaAWD

15+ Year Contributor
60
1
Jun 11, 2006
Marshfield, Wisconsin
I was wondering if this would be a symptom of a broken seal (or something else) in a master/slave cylinder:

I put a new CFDF clutch in my car (because I burned up the old stock one) and since then, I am having the same problem that I was before I replaced the clutch. When I first installed it, it worked fine, but I could tell I was going to have the same problem again. After bleeding and adjusting the clutch, it seems to lose pressure and after a while (the time period has shortened as the problem has persisted), I can no longer put my car into gear - the clutch never engages (or disengages depending on how you look @ it). If you adjust the clutch pedal out so it goes further into the master, the problem goes away for a short period of time but comes back. After it adjusted all the way out, however, the car is disabled - bleeding it again does not fix the problem and start the cycle over again.

Any thoughts? If you need more info, or a clearer explanation, let me know.

Thanks!
 
Check your clutch fluid resovoir. If it is empty, refill it, and bleed it. If you once again lose clutch pressure / the fluid disappears , a seal in your slave cylinder is most likely broken in your transmission and you are in need of a new slave cylinder and bleeding.

Hope this helps
 
d3m0 said:
If you once again lose clutch pressure / the fluid disappears , a seal in your slave cylinder is most likely broken in your transmission and you are in need of a new slave cylinder and bleeding.

Slave cylinder in your transmission? OMG Actually, it could be either the slave cylinder or the master. An easy way to check the slave cylinder is to pull back the little rubber boot around the pushrod, then watch for leaking fluid while someone else depresses the clutch pedal. Sometimes it's possible to fix a leaking piston seal by field stripping the cylinder, cleaning everything, and putting it back together. If that doesn't work, you might just have to replace it.
 
Strangely enough, there is no leaking fluid anywhere (except when you bleed it of course). I am assuming there is a seal bad in the Master that is causing the pressure to force the fluid back into the reservoir when the pedal is depressed. I ordered a new OEM master and slave cylinder yesterday and will see what it does when I install it Wed/Thurs. Wish me luck!
 
Similar just happened on my 1G. The slave cyl was bad. Pedal got REAL loose, and engaged right on the floor.

Replaced the slave cyl and all is well. :)
 
i'm having what i think is a similar problem..iv'e searched around this is the only thread on here that i found closest to my problem...

The master cylinder is new, so i believe it to be the slave possibly? When i shift the pedal can NOT be pressed to the floor (sometimes it works fine, other times is grinds bad) and if i lift the pedal a 1/4 from the ground it shifts fine! I've bled the system it seemed to work fine at that time, but gradually ended up having the same issue. I checked the resivor and the fluid is full to the top and has not moved. any ideas? Thanks in advance!!!
 
well dude, im having some sort of problem like yours, my slave and master were rebuilt, no leaks, ive done the bleeding thing plenty of times, and there are some more possible chances, 1. the fork on the clutch is bent (it should be in the middle or towards the driver side, but just a little) 2. wrong flywheel bolts were used 3. the pivot ball holding the fork needs to be shimed or its bad. 3. pedal assambly is wrecked. im diassambling the clutch pedal right now, and its a real pain in the ass, apparently i would need to weld it as this guides state:

http://www.dsmtuners.com/forums/showthread.php?t=156805

http://www.dsmtuners.com/forums/showthread.php?t=96981

this is considering you have a 1g, i dont know if it works the same on the 2g.

have fun dude, because im not having any. :cry:
 
yea i'm gonna change the slave and bleed the clutch again and see what happens.. .fingers crossed :) i found thing on vfaq on how too...seems fairly easy so we'll see..
 
gsxxy said:
i'm having what i think is a similar problem..iv'e searched around this is the only thread on here that i found closest to my problem...

The master cylinder is new, so i believe it to be the slave possibly? When i shift the pedal can NOT be pressed to the floor (sometimes it works fine, other times is grinds bad) and if i lift the pedal a 1/4 from the ground it shifts fine! I've bled the system it seemed to work fine at that time, but gradually ended up having the same issue. I checked the resivor and the fluid is full to the top and has not moved. any ideas? Thanks in advance!!!
If you encounter resistance when depressing the clutch pedal, and the clutch disengages properly prior to that point, check your pedal free play adjustment. It's possible that you're pedal is adjusted too far from the floor and is extending the slave cylinder pushrod beyond its design intent. Unfortunately, the vfaq link for this adjustment is not functioning, but if you have a Hayne's manual it should be pretty straightforward.
 
Does anyone know what the cylinder-shaped thing is that is bolted to the transmission just before the slave cylinder? I have heard that it can (and for performance should) be removed and replaced with a steel line. What does this "thing" do, could it be a potential problem area, and is it worth taking out and replacing with a line?
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

Back
Top