I have just replaced my clutch master cylinder, bled the lines of air, and looked for leaks in the lines and seals, but the lines still aren't holding pressure. When I bleed the lines the clutch goes back to how it should feel (slight pressure until I hit the sweet spot, and then about 1.5" of travel to the floor. It does great for about a block or two and then the clutch pedal isn't returning and the gears are difficult to shift into. Normally the shifter just goes into the respective gears with little to no effort but when this occurs the shifter then needs to be forced (as I slap my own hand for doing this) into but not out of gear. I can feel as the clutch pedal slowly loses pressure from the master cylinder for the first 4-5 times I push it in, but after that it just instantly goes out. Also, I noticed as the clutch is pumped to bleed the lines, there is a spurt of fluid from the reservoir valve back into the reservoir so forcefully that it shoots out of it like a fountain about 2-3 inches. Is this just a bad master cylinder or is there a mechnism that should stop this from happening? I've read on forums that there is a seal in the master cylinder that is being bypassed when this happens, but when I cracked open the old one (pulled the piston out of the master) it appeared as follows: the fluid enters from in MC fluid intake valve (outside of the piston wall) and then goes into the piston wall and out to the line leading to the slave cylinder. I saw no remnents of a seal inside of the MC. Unless the seal is part of the piston and is only supposed to work one way, in which case I'm lost on that one.
So to recap: remove old MC, check; attach new MC to SC line, check; install new MC, check; attach MC reservoir tank, check; bleed lines, check; look for leaks along all lines, connections, and external seals, check; original problem still exists, check :( What should my next course of action be?
have the same problem?
Wednesday, April 22nd, 2009 AT 11:41 PM