Manual Transmission - Master Cylinder? Slave cylinder? Need help!
09-25-2009, 12:19 PM
Clutch is sittin the the floorboard when car is running or off! I can pull it up with my foot but it will just fall back down. I can still push the clutch down (about 2 inches) which is enough to get it in gear sometimes. It will occassionally grind or not allow me to put it in gear. I tried pumping the clutch with my foot several times with the car on and it will not rise back up to its normal position. I can hear a faint squeak sometimes and once it had a pretty loud squeak that lasted about 5 seconds. Any idea if this is the master cyl or slave? Its a 99 Z28 6 speed with 88k miles. It is bone stock. Is there any way to test each one or some kind of process of elimination of the two without replacing each?? I've also heard of bleeding the system, could that fix it? This is my weekend car so it's not a huge rush but i'd like to drive it again soon! Thanks for any help,
09-25-2009, 12:55 PM
I'd try bleeding everything first.
If you end up needing a new master cyl let me know, I've got a nearly brand new GM complete setup that's been made adjustable, bench bled and ready to bolt in that I'd sell ya cheap.
09-25-2009, 01:19 PM
Have you noticed any hydraulic fluid leaking under the car or on the firewall? Check both locations for evidence of a leak as this can make determing the problem a lot easier. If you don't find any fluid then you can try bleeding the system. Start by check the fluid in the reservoir. If its dark or discolored then you need to flush and refill the system. If air is the issue then a good bleed could easily solve the problem. Try these things first and let us know what you see as results and we can proceed from that point. If you have any questions let me know and I will be happy to assist you. Thanks!
09-25-2009, 03:04 PM
Ok there aren't any leaks i'm aware of (on the ground at least). And i'll check the fluid and try bleeding it and see whats up. Jmm98ls1, thanks. I'll let you know if I end up needing it. How hard is it to bleed it? Where is the plug/bleeder screw ?
09-25-2009, 05:45 PM
Driverside of the bellousing just above where the line is going into it. Can't remember the size socket you will need but it will have to be a 1/4 drive for sure. Also, a good way to troubleshoot whether it's a slave or master is to disconnect the line going into the bell housing. But do that after you try bleeding it. I'm not going to lie, it is a PITA. With that disconnected, you should have a hell of a time pressing the clutch pedal down. If you can depress the pedal, it's time to change the master out.
But do that after you try bleeding it. Somehow if you pulled air in the master with it still being good can make the pedal spongy.
09-25-2009, 06:02 PM
Its a 7/16th socket. Its not that bad, just time consuming.
09-26-2009, 12:01 PM
Order of repair:
If still no go, then:
If still no go, then:
Problem will be fixed by then.
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