Floppy clutch pedal on S2

[tonytransam]

Changed clutch, replaced clutch hose and bled but now have a floppy clutch pedal 😫

help! 

[Sparky]

Pushrod in place?  Release arm operates  as expected?  If so, it has to be air.  How did you bleed?  Best done with a pressure bleeder.

[tonytransam]

Bled it with a vacuum bleeder. 

[CarBuff]

Another strategy is to un-bolt the slave cylinder while bleeding, let it hang down with the bleeder valve on top. That way you won't have any captive air pockets in the slave.

Edited July 16, 2022 by CarBuff

[Sparky]

I find vacuum to be problematic sometimes on clutch hydraulics.  Pressure seems to work much better.

[tonytransam]

On 16/07/2022 at 17:48, Sparky said:

I find vacuum to be problematic sometimes on clutch hydraulics.  Pressure seems to work much better.

When bleeding, should I position the clutch in the pressed position or support it the unpressed position? 

[drdoom]

If I'm not mistaken the reservoir is connected to the master main chamber and on out into the line when the pedal is retracted fully. Activation by moving the pedal first drives home the check valve which shuts off the feed from the reservoir, so preventing the pressure from avoiding the load at the slave end of the circuit. If correct that means you should pressure bleed with the master piston rod fully retracted, as in pedal at rest.

Cheers

[tonytransam]

Worked out somebody had jumped in the car and pushed the clutch pedal with no fluid in the line causing the piston to stick in the pressed down position, so just filling with fluid and vacuum bleeding would not return the piston. I used a pressure tester to push the piston back out so all good now!

[Fridge]

Result!