Bleeding the clutch system

[CaptainYeroc]

I am working on a 1987 944 and I just replaced the clutch master cylinder.
I am trying to bleed the clutch system from the slave cylinder now but there seems to be no pressure in the master cylinder. As soon as I touch the clutch pedal it sinks to the floor and will only come up if I pull it back. Is there something I'm doing wrong? I've been trying to pump the clutch but there is still no pressure in the clutch.

[2Tight]

You still have air in the line. If you can get hold of a Motive pressure bleeder (about $45) the task becomes a one man job and works flawlessly. Other than that follow the instructions in Clarks Garage for bleeding manually and you should be fine.

http://clarks-garage.com/shop-manual/clutch-02.htm

[drew1]

Don't know what Clark says. Sometimes pressure & vacuum bleeders don't get all of the air in clutches because of a high spot in the slave cylinder.

I think you need to bleed the master cylinder first. Tighten everything, fill the resevoir & put it to the floor. Loosen the master cyl fitting & let air out while the pedal is down. Tighten & do until no air & go to slave cylinder.

To me it seems like 1 or 2 strokes works better with clutches than pumping. The most important things are keeping fluid in theresevoir & patience.

[hpservertech]

Drew - Your kind of wrong here, there is no way to bleed the clutch master, only the slave.

No suggestions for you if your doing it by hand. I suggest getting a motive bleeder and doing it that way. Follow the steps on clarks and make sure the back end is up higher then the front.

[flash968]

definitely get the motive

[bleu951]

+ 1 on getting the motive. Fill the system with fluid, remove the slave, and depress the rod completely. Then re-install the slave, connect the motive, bleed the system and you should be ready to go.

It can be done with a Mityvac, i have done it, but the motive makes it much easier.

[hpservertech]

Whatever you do though, dont try to bleed it without the slave fully connected & bolted down.

You will blow the seal out if you dont.

[2Tight]

Originally Posted by hpservertech

Whatever you do though, dont try to bleed it without the slave fully connected & bolted down.

You will blow the seal out if you dont.

True dat. The piston over-travels and scars the seal if it doesn't blow it out completely. Most 944 slave units are rebuilt and normally have some pitting past the normal piston travel area. Even a new slave will fail if disconnected with full pedal during bleeding. For the price of the Motive bleeder I have used and loaned it out so many times I lost count.

[callmethewander]

+another 1 for the motive power bleeder, one of the best tools i ever bought.

[kdjones2000]

What is it with all of the necro-posts lately?

This one is from 2008!