Clutch Issues

Icey1174 · 03-06-2016, 08:36 AM

Clutch pedal is sticking to the floor AGAIN. This was an issue at the lend of last year too. I replaced and bled both the master and slave clutch cylinders 3 years ago.

Brake fluid is full, not an issue.

Went under the car to bleed it this morning and almost nothing is coming out of the bleeder valve while I have someone pumping the clutch pedal. If I leave the bleeder valve open brake fluid will drip out of it.

I did notice that black rubber top on the top of the cap for the master cylinder was squirting a small amount of brake fluid each time the clutch pedal was pressed. It looks like there is a small hole in the top of it almost like a relief valve for too much pressure. Is it possible that I just need a new cap for my master cylinder?

I cracked the line after the clutch master cylinder and again further down the line at the firewall before it goes to the slave. I did get some air out of those two areas, but I would expect greater pressure of fluid. Is it less pressure than the pressure while bleeding the brakes?

Is it possible I need to take the whole system out, run fresh, clean brake fluid through it, put it back together and bleed it again? It is possible that one of the cylinders is bad this quick again? I did buy both of them from Pelican Parts.

Thanks for nay help!

mytrplseven · mytrplseven's Garage

This sure smacks of a failed master or slave cylinder. If it was me, I'd replace the master first, as it's easier to replace and if that doesn't solve it, have a beer and then order a replacement slave.

Icey1174 · 03-06-2016, 09:56 AM

I might just order both and be done with it again. Why are they failing so quickly???

Icey1174 · 03-06-2016, 11:16 AM

Pulled the slave cylinder and it seems ok. I think it's easier to pull the slave than the master. Ordered the master. There is a tear in the rubber boot. Based on the fact that I was not getting any pressure to the slave, I am going to replace the master first and hope that works! I'm just shocked that It is only 3-4 years old and is bad again already. That doesn't seem right.

mytrplseven · mytrplseven's Garage

Was it a budget after market unit or OEM? There's so much more junk out there finding their way into the car market that it's becoming more sensible to go with known name or OEM parts. I just did that with an Oil Pressure sender. The old one was aftermarket and looked new but replaced with VDO regardless of the 100% higher price. I'm getting tired of being under the car instead of inside it.

Icey1174 · 03-06-2016, 12:43 PM

It was the lesser expensive one from Pelican. It it pushing pressure to the brake master cylinder and almost no pressure to the slave cylinder. Is it possible a clutch pedal adjustment could correct that or is it a bad seal of some sort in the master clutch cylinder?

Icey1174 · 03-06-2016, 01:05 PM

Would a worn clutch cause the pedal to go to the floor and get stuck? I am measuring 31mm. Clark's says 34mm or greater and the clutch should be replaced.

mytrplseven · mytrplseven's Garage

I guess that possible. where clutches are concerned 3mm can be substantial. I guess it's possible that the mechanicals of the clutch itself are concerned, possibility of clutch fork hanging up on guide sleeve, etc.