Well today was the day I was going to start with the SC install on the 85 and as my luck would have it something else rears its ugly head.
Last night, as I drove home switching from 3rd to 4th, my clutch pedal goes to the floor and stays there. I stuck my foot under it figuring I'll I'll lift it up and maybe it'll work to get me home. Once it came up, it stayed up(I can't depress the pedal at all. I managed to get it home carefully shifting clutchless.
I know it's either the slave or master cyls, I've had to replace them on the 944 twice but never on the 928. There is no brake fluid from within the car so I'm thinking slave? Is there another way to tell for sure? Brake fluid warning light came on as I was shutting it down.
Now that I'm about to tackle this does anyone know what happened here regarding the immovable clutch pedal?
Here we go again switching from enhancement wrenching to repair wrenching. I guess my car doesn't want me to get spoiled.

Dave

 

Blue hose disentigrated.

Edit: try this thread--->thread

 

Shane,
Thanks for the input, I'd seen that thread. I've checked the blue hose and from the outside, it looks good. There are no leaks on either side of the firewall. Are you suggesting that the hose disintegrated from within, causing particles to get in the clutch master and seizing it up?

 

Dave just swag on my part. But one of the most common failure points is the blue hose.

 

I loosened the slave cylinder and was able to move the pedal no problem(slave piston moves). I'm thinking that the release arm is seized. I now believe the problem to be more than I expected. Any suggestions?

 

I've had two problems which might be related. On my 82 the clutch pedal suddenly hit the floor and stayed there. Turns out there is a spring in the master cylinder which returns the pedal. Mine broke... a new m.c. was required. On my '79 the pedal suddenly hit the floor and stayed there. The throwout bearing is attached to the pressure plate via a tube, washer and clip. My clip was worn and the throwout bearing was able to come off the pressure plate. Neither were expensive but both were a pain. I would start at one of these two points...either drain the fluid, pull the brake pedal, pull the m.c. top clip, pull apart the m.c. and look at the guts, or pull the clutch compartment cover and have a quick look in there. If you take the hydralic approach I really really suggest getting a power bleeder thingee from Pelican Parts. Otherwise you can spend days trying the get the last of the air out.

 

When you put your slave cylinder back on after you were able to move the pedal, did you try pressing the pedal again? Did the pedal depress or was it stuck "up" again?
I don't see how the problem would be in the clutch itself, unless the fork (release arm) jumped off of the ball cup bushing (if it were worn or missing altogether) and that somehow made the pedal go to the floor. But, what would make it stick in the air? I've read that you can check the ball cup bushing by removing the air intake filter housing and look down at the top of the bellhousing with a flashlight........or something like that (search archives).
Maybe try pulling out the little plug on the lower bellhousing, where you can check the clutch disk wear, and see if the slave cylinder rod is pushing on the clutch fork correctly.
HTH

 

Karl I think you may have hit upon something here. I took a look through the inspection hole under the slave rod. It looks as though the rod is fully extended and the release arm fully deperessed. This probably means that when I returned the clutch pedal to it's original position, the slave rod did not return with it and I've been applying further pressure to the rod that has no more movement left. I'll take the clutch cover off tomorrow and take a look in there.
John,
Funny thing is that I have the hood as well as the intake off of the car(SC install) and never thought to look down! I'll check this first thing tomorrow.

Thanks for the assistance guys.
Dave

 

Your welcome!

If your release bearing lost its clip ring and the slave cylinder rod is completely extended, I would think that if you looked further up into the inspection hole at the central shaft and the release bearing you would see the release bearing pulled back and completely out of the pressure plate.
It does kind of sound like you'll have to go in there no matter what anyway
If you need help, let me know. I just replaced my clutch disks and took real good notes and pics. ....plus, I invented a pilot bearing puller. It makes it real easy to get the pilot bearing out if you decide to replace it.

 

It does sound like the retaining clip poped off the release bearing and the bearing no longer pulls back on the pressure plate spring fingers.

 

Exactly what happened. Just gotta get the car a bit higher to get in there.
-Dave