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Discussion Starter #1 (Edited)
2008 Suzuki SX4 sedan 5 speed 4 cylinder 2.0L 175,000 miles. Owned for 3 years. Never had a problem other than a/c going out. Drove 25 miles from my home to the neighboring town the other day. Once in town, I pressed the clutch to shift to neutral and clutch went all the way to the floor. No resistance. Couldn't shift into any gear. Coasted to a stop. Got out and checked reservoir. Fluid well above min. No obvious damage from what I could see. Car will shift into gears while it is not running and will start in first and is drivable but cannot shift into any other gears when running. Clutch pedal still has no resistance while car is running. Never had any problems with the transmission or clutch. No slipping, no noises, no shutter, no leaking, never have had to put any fluid in the reservoir since I've owned it, clutch has always engaged perfectly, pedal has had just the right resistance, changed transmission fluid earlier this year. No warning signs whatsoever. Have read a few forums that have said possible problems ranging from master cylinder, slave cylinder, broken clutch fork, bad pressure plate, air pocket and even worn clutch. I won't be fixing this problem myself. It's at a transmission shop at the moment. I just want to get a better idea of what it might actually be so I know what to expect when I go back to the shop and don't get taken, if you know what I mean.
 

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Well..so many possible causes that it is hard to pinpoint any one in particular...but as you say fluid has always been OK, so I see no real reason to go for a bleed... it would help only if air had entered the system, but check again for fluid level...
Master cylinders do fail.... I think all mechanical parts are tight and i do not see why one would have disconnected .
See this in the mean time:
www.avigex.ca/sx4/clutch.pdf
..however, the condition you describe is not listed in the trouble shooting guide....
 

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Discussion Starter #4
Page not found on the link you posted. Like I said, there has never been any issue with the clutch, clutch pedal, any gears or fluid level. Just seemed to happen out of the blue. When I left home, everything was fine. I did drive around 75mph for about 25 miles and by the time I got to town the clutch pedal went straight to the floor with no resistance and couldn't shift gears. So you say a lees probably won't help? I was hoping the easiest cheapest way might work and save me some money. I read that you can check the master cylinder by taking the cap off of the reservoir, pressing the clutch pedal and watching for level changes. If there are level changes, then the master cylinder is bad. If there aren't any level changes then it could be the Slavs cylinder it something else. Does that sound correct?
 

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I would think if the slave cylinder failed it would be losing fluid. If the master cylinder has failed there could be no fluid leak but also it could not push any fluid (no clutch). I doubt if the clutch is worn as I'd like to think it would slip before it's worn out completely. It is possible that the hose has failed (Bulging) but unlikely. No fork on the SX4 looking at the parts list.
I'll see if I can find the clutch bleeding bit in the manual, I don't think it would help as how would the air have gotten in, but it would give you an indication as to if the master cylinder is pushing fluid.

 

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Discussion Starter #8
Went to the shop to try to bleed the clutch to see if that would help. Found my car unlocked and keys in their ignition. Car has been there since Tuesday night. Got in to see how the pedal felt and had a small amount of resistance so I pumped the clutch. Suprisingly the pedal pumped up quite some resistance. I was able to leave with the car but as I drove the ideal got softer and softer to the point that by about 10 miles down the road when I had to come to s stop, I had to press the pedal hard to the floor to disengage the clutch so I could put it into gear and drive off. I pulled over and pumped the clutch pedal which built up more resistance. On my way home, I noticed that as I would come to a stop, I could pump the pedal whole in neutral and build up resistance to continue driving further. I guess what I'll do is change the fluid and bleed it now that it's home and hope that that fixes it. I'll keep and eye on the fluid level in the reservoir and see if it's dropping.
 

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Discussion Starter #9
Went to the shop to try to bleed the clutch to see if that would help. Found my car unlocked and keys in their ignition. Car has been there since Tuesday night. Got in to see how the pedal felt and had a small amount of resistance so I pumped the clutch. Suprisingly the pedal pumped up quite some resistance. I was able to leave with the car but as I drove the ideal got softer and softer to the point that by about 10 miles down the road when I had to come to s stop, I had to press the pedal hard to the floor to disengage the clutch so I could put it into gear and drive off. I pulled over and pumped the clutch pedal which built up more resistance. On my way home, I noticed that as I would come to a stop, I could pump the pedal whole in neutral and build up resistance to continue driving further. I guess what I'll do is change the fluid and bleed it now that it's home and hope that that fixes it. I'll keep and eye on the fluid level in the reservoir and see if it's dropping.

Attempted to replace the hydraulic fluid. Turned out to be quite a long procedure the way I was going it. Pumping the clutch and then loosening the bleeder valve only to let a small amount of fluid out each round. I replaced what I thought was the majority of the fluid. After a few weeks of not having any issues with the clutch, I made the 25 mile drive to the same city I went to the first time I had the issue with the soft clutch and damn if it didn't try to do it again. Both times I drove 80 mph for 20 straight miles in 5th gear. That has to have something to do with the problem because it doesn't do it any other time. The fluid is still full but has turned a tan color.
 

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Same issue

I am having the same issue with my 2006 Suzuki Forenza. I was taking the car on a 4.5 hour trip, mainly highway driving. I stopped about half way through for fuel and had no issues. On the tail end of the trip (after a long stretch of high way), as I was getting off an exit the clutch pedal went right to the floor with no pressure. I was able to shift and gear into first with the vehicle off and then pop it in and out of gears 2-5 to finish my trip. A few days later I got back to the car, was able to drive it to a local mechanic in the same condition, and he had no simple fix on the spot. I decided to drive it to my parents home town 2 hours away to have someone else look at it. I stayed on mostly back roads with minimal stops and for some reason the car slowly returned to normal! I dropped it off at a local mechanic and am waiting for some feedback. I feel like this can be cause for an entire clutch replacement.

Have you gotten any more information or did you find a solution?
 

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Diagnostics!

When it is failure mode, check the travel at the slave cylinder,
if there is no movement, you are looking at the master cylinder leak past..

If there is full movement, you are looking at an internal clutch issue..

... Philip
 
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