Clutch stuck in. And im stuck.

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Ptownsound
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I was adjusting the pedal freeplay and I think I overtightened it.I started the car and when I pushed the clutch in I heard a pop, looked under my car and the bolt to my master cylinder was on the ground. the clutch moves freely and I cant seem to regain pressure. All parts seem to be fine from what "I" know, the bolt that snapped came from the side of the master cylinder so i replaced it on the other side.

Other than that i dont know how to regain the pressure and i dont want to spend the money on parts I dont need... How can I tell if each part is functioning properly (master cylinder, slave cylinder, ect?)


scottydog
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Car: 1992 240sx

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Check the pushrod going from the pedal to the master cylinder and make sure it is in correct spot on the piston, and that the mc is mounted correctly.

It's hard to imagine such a bolt breaking. There are two mounting bolts going thru the firewall for the master cylinder. You will need nuts for both sides.

Did the pushrod break off the pedal?

Download the fsm and you will see the clutch system diagrams.

Ptownsound
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scottydog wrote:Check the pushrod going from the pedal to the master cylinder and make sure it is in correct spot on the piston, and that the mc is mounted correctly.

It's hard to imagine such a bolt breaking. There are two mounting bolts going thru the firewall for the master cylinder. You will need nuts for both sides.

Did the pushrod break off the pedal?

Download the fsm and you will see the clutch system diagrams.
the bolt that connects the firewall to the master cylinder snapped. the other wasnt even on. id take it to my shop but i cant move it. i really dont know how to determine what is broken. when i took off the master and started pumping the push rod it seemed to function.

really i adjusted the clutch catch a little too high and when I pressed the pedal in *POP!*. bolt falls from the car/ no leaks!

bruinbear714
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Have a buddy check the fork on the transmission when you press the pedal. If it doesn't move, then your problem is either master cylinder, clutch slave, or lack of fluid.

If it does move and you can't get in gear, then its time for a clutch change and/or new transmission.

Ptownsound
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bruinbear714 wrote:Have a buddy check the fork on the transmission when you press the pedal. If it doesn't move, then your problem is either master cylinder, clutch slave, or lack of fluid.

If it does move and you can't get in gear, then its time for a clutch change and/or new transmission.
I just had a new exedy stage 2 clutch and flywheel put in so I hope its not that. i just talked to my shop, disconnected the slave and started pumping the clutch and it is pumping fluid out. so my guess is the slave

BUT I dont know how to tell if a slave is broken? other trial and error ideas?

scottydog
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So one bolt missing, the other snapped. The bolt broke because the other one was missing.

You have to remove the broken bolt. From the diagrams it looks like you may be able to use a screwdriver to push it thru the firewall to remove. Then replace both of them. you might have to replace the entire pedal bracket.

Reinstall the mc (properly) and it should work. If the clutch worked before you did the adjustment it should work again.

Ptownsound
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the other bolt holds just as much pressure. the master isnt moving anywhere. the whole system wont gain pressure.

im leaning towards broken slave but still asking questions

scottydog
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If the mc is mounted and stable, and you can't get pressure you have a leak/air somewhere. Could be bad/leaking slave, cracked pipe, bad dampener system. Check for a leak under the slave rubber and along the line. Remove the dampener loop if you haven't already. Then rebleed.

Ptownsound
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there are no leaks I can find. when I bled the system all the fluid I pumped out with the master cylinder went out the slave but when I reattach the slave it doesnt gain pressure and all the fluid stays in the master.

but the master is able to pump.

so with no leaks my guess is master and/or slave

scottydog
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If you open the slave valve and fluid comes out when pushing the pedal the mc is working. Likely still have air in the system. A slave failure will show up as a leak under the slave rubber.

Have you removed the crap dampener? It takes forever to bleed both the nipples with that dampener valve. Also the dampener valve gets gummed up. I had the same bleed problems until I removed it.

http://garage.projectraine.com....html

Ptownsound
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I have a replacement slave now but before I do that Ill remove the dampener first.


scottydog
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Do them both at the same time while you're there.

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g35paul
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well i had this happen to me just recently.. my pedal was adjusted to far out and was causing to much pressure.... car ran fine for bout 600 miles then all of sudden wouldnt go in gear any more... i went through 3 slaves b4 i finally figured out that it was to much pressure....

i ended up pushing my throw out bearing through my pressure plate... needless to say i had to replace the whole clutch again.. thankfully i had an extra one laying around.....

scottydog
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Paul you're right, he could have pushed the to bearing thru the pressure plate. If the new slave doesn't fix it time to pull the transmission...

gdbyyosh1to
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Car: a wrecked 240sx

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Take the slave cylinder out and make sure the finger moves freely and check for bad seals. While the slave cylinder is out check the clutch fork for movement. If it moves back and forth ok then your throw out bearing is fine.

Also, either get a new mounting bolt or new master cylinder asap because even if you replace every other part in the clutch system, you're bound to break something again with only one bolt holding it to the firewall. I have a spare i'll sell for cheap if you need one.

When the whole system is hooked up does the pedal not move at all or does it just go straight to the floor?

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g35paul
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just reach under ur car and see if u can move the fork with ur hand... if not the u have way to much pressure and pressed the throw out through the pressure plate..... was it making a whining kinda sound b4 it stops working?


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