Clutch pedal problem

[SIMBAT]

ok so i sold my lib and now have a 98 GC8 WRX and i thought id give the good old lib forum a go for any ideas on my problem.

The clutch pedal stroke is no longer linear on my 98 WRX. Im pretty sure I just stared noticing it last week and i can confirm it is getting gradually worse.

Basically the clutch pedal is still working atm but whenever I'm pulling out the clutch pedal this happens...

From the fully depressed position the clutch pedal travels normally until the final 3cm or so of travel i feel a distinct point of resistance then a resistless 'flop' upwards.

Also during spirited acceleration the pedal can sometime get stuck at the point of resistance and i have to pull it back up the last 3cm manually with my foot.

I've looked at the pedal mechanism from in the foot well and have noticed a tiny bit of green drops coming from the rubber ring around the rod that gets pushed into the firewall.


sorry for the essay but need at bit of help here

[RX25SE]

Sounds like a sticky master cylinder or a perished flexible line.

Might also pay to check that the push rod from the pedal has some freeplay with the master cylinder all the way back. Basically from fully up, the pedal should move down about 3mm before it begins to move the master cylinder piston.

[SIMBAT]

yea theres no play in the rod so i think its either the master cylinder or the slave, the research I've done seems to be shifting the blame to the slave as apparently they make more trouble.

[RX25SE]

If there is no play then the adjustment is incorrect.
Try adjusting it to give some freeplay, it may solve the issue.

FYI If the master cylinder piston cant return all the way back, it won't move past the compensating port allowing the pressure in the line to equalise.

[SIMBAT]

found the problem... leaking hose

[RX25SE]

Good.

Still check the freeplay though.

[SIMBAT]

yep will do