I just signed up to NICO, hoping maybe you guys can answer this problem. Here's my long and drawn out clutch saga:
The car had a bad slave cylinder when I bought it. The car lot put a new slave cylinder in it and the car was great for about 2 weeks. Then the clutch started slipping, and I was somewhat broke at the time so I ordered an autozone clutch. Put it in, noticed the pedal feel was VERY weak, but ran it 3 days (not abusing the clutch) and it was slipping so badly the car wouldn't go. Thinking it was just a bad clutch, returned it and installed another autozone clutch. This time it made it 2 days. Thinking maybe it wasn't the clutch that was the problem, ordered a new master cylinder and installed it. Somewhat better, but did not fix the problem at all. Finally gave up and bought a used Zoom clutch from a buddy and installed it. Noticed the sleeve that the throwout bearing rides on (the plate that bolts to the front of the transmission at the input shaft) was broken. Hoping this may have been the problem, found another front plate and swapped it out. The car did awesome with the Zoom clutch for about a week. Then the pedal started dropping like a bad slave cylinder. Put a new slave cylinder on it, and removed the dampner (devil box?) bled it out, and the car has a good pedal... except for it falls to the floor after about 10 seconds. The pedal actually almost sucks itself to the floor. You pull the pedal up and pump it twice and it's great... then it sucks back down to the floor again. The system has been bled, and bled, and bled. My mechanic is convinced the master cylinder is bad... but it's brand new. I've also heard the pedal assembly itself could be broken. SUGGESTIONS PLEASE!!
Cliff notes: put in 3 clutches, clutch grabs good now, new master cyl and slave, pedal falls to floor by itself even after completely bled.
1992 240SX clutch problems
Re: 1992 240SX clutch problems (jewforty)
Don't assume new parts to be good parts. Where did you purchase the master and slave at? If the pedal is falling to the floor either you have a leak but Im sure you would have noticed this or a faulty part, but I've had cars come in with new parts and they were not bled completely. Sometimes you can get an air bubble trapped in the corner and can cause this.
Re: 1992 240SX clutch problems (mister2nr)
master and slave both came from advance auto... There's no leaks (that I've found) and I blew the line out as well in case there may have been trash or something in it. My mechanic told me alot of my problem with bleeding it was that I didn't bench bleed the master, but I didn't know beforehand. Another thing was the plunger rod on the master... The clutch was letting out at the very top, I adjusted it where it lets out at the middle, but for some reason there's still alot of play in the pedal at the top. Could me running the stock throwout bearing with the Zoom have anything to do with it as well?mister2nr wrote:Don't assume new parts to be good parts. Where did you purchase the master and slave at? If the pedal is falling to the floor either you have a leak but Im sure you would have noticed this or a faulty part, but I've had cars come in with new parts and they were not bled completely. Sometimes you can get an air bubble trapped in the corner and can cause this.
Re: 1992 240SX clutch problems (jewforty)
You might try checking the spring in the clutch pedal and the little bushings they ride in. make sure the spring isnt broken or routed wrong. Hydraulics only push the pedal back a little, its the spring that keeps the pedal up. And a little play at TDC (I guess top dead center.... of the clutch pedal travel) is okay.