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Old 07-28-2017, 01:25 PM   #1
Scooby Newbie
Member#: 471758
Join Date: Jul 2017
Default Master cylinder

ecently changed the clutch on my 05 forester because one day she would not go into gear and the clutch felt spongier than usual. I finished the clutch a few days ago and i am now attempting to bleed the clutch but very little brake fluid is coming if any at all and i can not get any pressure in the clutch pedal so it sticks to the floor when down. Could my master cylinder be bad
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Old 07-28-2017, 01:41 PM   #2
Scooby Specialist
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
2016 STI


I never did my STI, but I know on my last manual car bleeding the clutch was different than brakes for some reason that I can't figure out.

If I bled it like brakes I'd get the result you are talking about:
basically, push down pedal, then crack bleeder, then reclose bleeder, then let out pedal. Then the pedal would just stay down dead.

If I put a length of hose on the bleeder that went down into a cup WITH fluid in it so the tube end was submerged under fluid, then do the same procedure cracking and closing the bleeder, etc. . . .it would then stay primed and the pedal would return back up to it's normal position.

No f-ing clue why it makes a difference to have a tube going down into a cup of fluid because brakes don't need that at all, but it made a huge difference with the clutch.
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Old 07-28-2017, 05:43 PM   #3
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT


Any master cylinder, did you bench bleed it first (you should have).
If you did, you may need to pull up on the pedal while bleeding until you get air out. A rope on the pedal can help pulling the pedal up.
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Old 07-28-2017, 07:24 PM   #4
Trust no one
Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
02 WRX
15 WRX/05 GTO


Please stop making these threads, you have a thread for this in the correct forum so please use it-
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