Clutch Hydraulic System, NEED HELP...

Choopster · 01-01-2008, 10:47 AM

Hi,
I have been experiencing for some time now being at a red light and my clutch system bleeding off and stalling the engine. I then have to pull the pedal off the floor and away I go for some time, can be several days or a week. I decided to put a new slave cylinder on today that I purchased at NAPA, it is the exact same as I took off, Aisen. I performed a thorough bleeding process of having my son depress the pedal as I opened up the bleeder valve. I also while opening the bleeder pushed the slave piston all the way in to escape any trapped air, I feel like all the air is out. Now the strange part, what was happening every few days of the system bleeding off, it now occurs before I can get out of my garage, every time I lift the pedal and depress it leaks off. Please help...

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**DeathCougar** · 01-01-2008, 10:59 AM

Sounds like the master cylinder to me. Have you looked to see if it is leaking? Is it losing any fluid?

The master cylinder can bypass without operating or leaking as well. I would look into that.

Choopster · 01-01-2008, 11:05 AM

No fluid leaking anywhere. I am just very puzzled as to why a new slave has so exagerated my problem. Thanks...

KdF · 01-01-2008, 02:34 PM

The new slave had more back pressure than the old one, thus the final straw.
I am confused.....you pull the pedal off the floor?? Does your clutch pedal spring not work? I don`t have a standard so I am lost.

Adam F · 01-01-2008, 02:43 PM

I had the clutch pedal to the floor problem on my 88. Replaced the slave cylinder...no dice. Replaced the master cylinder, good to go. (actually I rebuilt the master)

Choopster · 01-01-2008, 04:30 PM

Thanks for the feedback guys. I think my clutch pedal spring is fine, it seems to require fluid pressure for it to return to the top position. I am going to purchase a master cylinder tomorrow and cross my fingers.

apalmer1 · 01-01-2008, 04:53 PM

yea weather you have a good spring or not wont make a difference, if there is a leak in the hydraulic lines the pedal will litteraly get sucked down to the floor when you start to press it. It will do this if the slave cylinder or the master cylinder has a bad seal or if the bleeder valve is left open. In your case i bet its the master cylinder, they seem to fail much more often.

Adam F · 01-02-2008, 02:01 PM

FYI i had no leaks anywhere in the system when mine failed

warriors_03 · 01-02-2008, 04:40 PM

Quote:

Originally Posted by Adam F

FYI i had no leaks anywhere in the system when mine failed

What symptoms where you having and on which runner?

Choopster · 01-08-2008, 09:16 AM

Hi,
I have replaced the master cylinder and my problem is fixed. Thanks for the feedback...

**DeathCougar** · 01-08-2008, 10:28 AM

I win at teh internets and teh Toyota.

Bow down puny mortals! lol jk

01-01-2008, 11:05 AM	#3 (permalink)
Choopster Registered User Join Date: Jan 2007 Location: Radford, Va Posts: 37	No fluid leaking anywhere. I am just very puzzled as to why a new slave has so exagerated my problem. Thanks... __________________ Choopster 1998 TRD 4Runner TRD Supercharged K&N cold air induction system ARB front bumper w/winch ARB underhood air compressor Sonoral Steel 2nd generation rear bumper JAOS Battle Z suspension w/Old man Emu shocks JAOS side bars Borla SS exhaust Custom rear under carriage storage box Alpin sound system w/Sirius Garmin GPS "Life is short, make a difference"

01-01-2008, 02:34 PM	#4 (permalink)
KdF Registered User Join Date: Sep 2007 Location: Austin Texas Posts: 53	The new slave had more back pressure than the old one, thus the final straw. I am confused.....you pull the pedal off the floor?? Does your clutch pedal spring not work? I don`t have a standard so I am lost. __________________ KdF In Memory of my Only Son Chris 99 Taco Prerunner Full OME Suspension Replacement Poly Bushings (all) replacement Greasable shackles

01-01-2008, 02:43 PM	#5 (permalink)
Adam F Registered User Join Date: May 2002 Location: Cincinnati Ohio Posts: 2,398	I had the clutch pedal to the floor problem on my 88. Replaced the slave cylinder...no dice. Replaced the master cylinder, good to go. (actually I rebuilt the master) __________________ 88 4Runner. 350 V8, R150 5-speed. SAS, 36" TSL's, elocker rear

01-01-2008, 04:30 PM	#6 (permalink)
Choopster Registered User Join Date: Jan 2007 Location: Radford, Va Posts: 37	Thanks for the feedback guys. I think my clutch pedal spring is fine, it seems to require fluid pressure for it to return to the top position. I am going to purchase a master cylinder tomorrow and cross my fingers. __________________ Choopster 1998 TRD 4Runner TRD Supercharged K&N cold air induction system ARB front bumper w/winch ARB underhood air compressor Sonoral Steel 2nd generation rear bumper JAOS Battle Z suspension w/Old man Emu shocks JAOS side bars Borla SS exhaust Custom rear under carriage storage box Alpin sound system w/Sirius Garmin GPS "Life is short, make a difference"

01-01-2008, 04:53 PM	#7 (permalink)
apalmer1 Registered User Join Date: Nov 2006 Location: Bend, OR. Posts: 664	yea weather you have a good spring or not wont make a difference, if there is a leak in the hydraulic lines the pedal will litteraly get sucked down to the floor when you start to press it. It will do this if the slave cylinder or the master cylinder has a bad seal or if the bleeder valve is left open. In your case i bet its the master cylinder, they seem to fail much more often. __________________ 04 taco, 3.4 5spd. loads of goodies, FZJ80 axle SAS in progress. 85 pickup, 327sbc, truggy, in progress. 86 mazda b2000 street queen haha. 92 mazda B2600i 4x4 absolutely mobs. 81 ford bronco drinks gas 90 mazda mx-5 all original. when in doubt, tach it out.

01-02-2008, 02:01 PM	#8 (permalink)
Adam F Registered User Join Date: May 2002 Location: Cincinnati Ohio Posts: 2,398	FYI i had no leaks anywhere in the system when mine failed __________________ 88 4Runner. 350 V8, R150 5-speed. SAS, 36" TSL's, elocker rear

01-08-2008, 09:16 AM	#10 (permalink)
Choopster Registered User Join Date: Jan 2007 Location: Radford, Va Posts: 37	Hi, I have replaced the master cylinder and my problem is fixed. Thanks for the feedback... __________________ Choopster 1998 TRD 4Runner TRD Supercharged K&N cold air induction system ARB front bumper w/winch ARB underhood air compressor Sonoral Steel 2nd generation rear bumper JAOS Battle Z suspension w/Old man Emu shocks JAOS side bars Borla SS exhaust Custom rear under carriage storage box Alpin sound system w/Sirius Garmin GPS "Life is short, make a difference"

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