[gbarrier]

Today I decided to bleed the clutch hydraulics on my recently acquired 968. Ever since I bought the car the pedal has taken a little more effort than I thought it should. I was told that it had a clutch disc replaced shortly before I bought the car. I hooked the mity vac to the port on the slave and pulled a fair amount of fluid thru. I got air from start to finish, probably pumped 12 or so ounces thru. When I gave up and stepped on the pedal it fell to the floor and stayed there. What have I done?

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[DaveN]

Excuse me for not understanding but some clarification may be required, for me anyway <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

You hooked up vaccuum to the slave cylinder and pulled liquid? For one thing if there is any leak at all in your setup or you have not removed the reservoir cap (to release that potential vaccuum) you will draw bubbles from any connection. It is commonly accepted practice to push liquid from the reservoir through the system to exchange fluid or bleed air. You have probably introduced one massive bubble in the clutch line. Try filling the reservoir and pressurize the system a la Motive or get some one to pump the clutch whilst you operate the bleed screw on the slave cylinder until you are bubble free. Be aware bubbles like to rise quickly on the clutch system unlike the brake lines which lay mostly horizontal, Don't take too long between pumps.

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[flash]

agreed - dump the mityvac and get the motive



that being said, you may have a weak spot in the main pressure line that just hasn't ruptured yet - this is very common - you can see the hose expand, usually near the coupler, when somebody steps on the pedal

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[gbarrier]

Well looks like suck and blow aren't always the same thing.



Have used vac in the past on 944 but blew my mind when it sucked the pedal down. Anyway not willing to wait to order pressure system grabbed a 1 gal garden sprayer from Lowes and a brass fitting to put in the cap I got from pull a part this afternoon on the way home. Pressure system worked great. Haven't driven the car yet to see if the clutch feels any better but I really hope it does.



Tell me about the braided stainless line. I know on some vehicles where we change the brake lines out for stainless it changes the feel of the pedal. What can I expect if I install one?

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[flash]

you can expect a slightly firmer pedal, and never again to have to worry about the hose degrading from the inside, as all rubber hoses do

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[Scott Collins]

+1 on the braided steel clutch line - and it was simple to install. Happy New Year! -Scott

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[gbarrier]

Firmer pedal I can appreciate.



I just don't like how much pressure the pedal takes. As it turns out don't think there was any air in the system.



How do I tell which pressure plate I have. If it is the pressure plate I don't like it. The heavy pedal is just not in harmony with the rest of the car.

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[flash]

pedal pressure, and how one feels about it is very subjective



also, there are different rating of pressure plates out there, and even different feel with the copy plates that you get from a lot of the suppliers



unfortunately, unless you know what each one feels like, there is no way to tell which one you have without taking it apart - if you are close to pete or me, we can tell - i don't know anybody else who knows by feel



a correct factory plate should be very progressive feeling, beginning about an inch from the top, and continuing down all the way to the bottom - a copy will feel almost like it is going up a ramp and then down again as you push the pedal - the mid level higher pressure plate, will be more like the factory one, but stiffer - the really stiff one is just really stiff from the onset - that one is even too stiff for me



personally, i think the factory pedal pressure is too soft - i can't feel the clutch engage, and it's too slow for me as well - i like a firmer and faster reacting pedal, so i have the middle one - i know guys who think the factory plate is too stiff though - everybody is different there

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