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View Full Version : how much pressure does it take to "move" the clutch pivot fork?

heavenboundkevin
08-09-2009, 03:13 PM
I am trying to finish my 5 speed swap, and just got done breaking 3 clutch slave cylinders. Im pretty frustrated, and just need to know this.

Is it supposed to be REALLY hard to move the clutch fork? Im talking about the object that the slave cylinder presses on.

The symptons im getting is, the master cylinder seems to not build pressure, or the slave isnt building the pressure. when the slave is not bolted to the bell housing, i can see that the slave cylinder piston is functioning correctly. However, when i bolt it to the bell housing and set it up with the clutch fork, it doesnt press the fork in.

I can move the fork by hand, but its really hard, i actualy had to place a cheater bar on it and its REALLY hard to get it to Move.

So i need to know if i need to drop the tranny and investigate whats going on, or if its a slave/master/clutch line issue.

Thanks. BTW the master is new oem, i had a oem slave(broke),carparts slave(broke)and a autozone slave(broke) yeah.. =[
LongGrain
08-09-2009, 03:28 PM
the amount of pressure needed will vary depending on what clutch you have.

it sounds like its not bled correctly or something, did you delete that damper box thing?
heavenboundkevin
08-09-2009, 03:31 PM
yeah, its an auto to manual swap, so there was never a damper box. Its a oem replacement clutch.
onepuff
08-09-2009, 03:45 PM
Sounds like something is up with the clutch/pressure plate. OEM clutch shouldn't take that much pressure. What exactly is breaking on the slave cylinder?
heavenboundkevin
08-09-2009, 04:07 PM
onepuff-like the name. well, 2 slave cylinders, the nipple twisted off, and the other, it exploded/came apart...
Def
08-09-2009, 05:29 PM
You can't move the pivot rod by hand, it's supposed to take hundreds of lbs of pressure(hence why the car uses hydraulics to multiply the force your leg makes).

It sounds like you need to PROPERLY bleed the clutch system. Remove the damper thing if you still have that. If you have air in the system you'll just compress the air and not actually move the slave.
LongGrain
08-09-2009, 06:00 PM
You can't move the pivot rod by hand, it's supposed to take hundreds of lbs of pressure(hence why the car uses hydraulics to multiply the force your leg makes).

It sounds like you need to PROPERLY bleed the clutch system. Remove the damper thing if you still have that. If you have air in the system you'll just compress the air and not actually move the slave.

this

msglngth
heavenboundkevin
08-09-2009, 08:36 PM
That damper thing is not there. I had an automatic car. So, its not looking like i need to rip off my transmission? Thats good
Def
08-10-2009, 06:35 AM
Read the FSM, it should answer all your questions.
contranication
08-10-2009, 08:20 PM
The same thing happened to me once.

I didn't blow out slaves but I wasn't getting enough travel, the measurement of the slave travel is about 3/4" (don't quote me on that) but you can take apart your blown slaves and measure how much sits in the piston and calculate how far it is supposed to travel.

Regardless after many tries I ended up bleeding the system by pulling the master out and lifting it up out of the engine bay as far as I could w/o bending the line and gravity bleeding, then I put it back in checked for proper clutch pedal travel and everything worked great after that. Hope this helps.