Clutch Master Cylinder

Synchros shot? Weird noises while shifting? Not sure what needs to be replaced?
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bk7794
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Clutch Master Cylinder

Postby bk7794 » Thu Oct 29, 2015 3:28 pm

So I decided to take a quick peak around my car today. Checked all the fluids and they are all good. However, I noticed my clutch MC level moved ever so slightly. I assumed it was probably because of wear and tear on the clutch. Though when I took a peak at the other side I noticed it was damp.

So my question for you guys is...how long does it have to live? It wasn't like dripping out, I just noticed it was a tad damp. I know these have a fairly big issue with MC hydraulics and whatnot. Just looking for some .02.
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Re: Clutch Master Cylinder

Postby AHTOXA » Thu Oct 29, 2015 5:48 pm

Hard to say in definitive terms as to how long it's got to live. I had one experience with a master clutch cylinder that went on me very fast. It was not an immediate failure, but it got progressively worse through the drive home. However, I have no idea whether it was seeping before or not.

For a piece of mind, I'd replace it sooner than later. Otherwise, you might end up with pedal going to the floor and not coming up.
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Re: Clutch Master Cylinder

Postby potownrob » Wed Nov 04, 2015 2:43 am

bk7794 wrote:So my question for you guys is...how long does it have to live?

https://www.youtube.com/watch?v=yi3k65MlDCA

tl; dw: 90 minutes
BUT DEM FAHGLEITZ!! :shock:

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Re: Clutch Master Cylinder

Postby bk7794 » Mon Nov 09, 2015 11:21 pm

In all honesty...I completely forgot why I was watching that video until I clicked the back button.


AHTOXA wrote:Hard to say in definitive terms as to how long it's got to live. I had one experience with a master clutch cylinder that went on me very fast. It was not an immediate failure, but it got progressively worse through the drive home. However, I have no idea whether it was seeping before or not.

For a piece of mind, I'd replace it sooner than later. Otherwise, you might end up with pedal going to the floor and not coming up.


Thanks for the heads up. That's what I fear. Stepping on the clutch and it not coming back up.
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Re: Clutch Master Cylinder

Postby potownrob » Tue Nov 10, 2015 2:23 am

bk7794 wrote:In all honesty...I completely forgot why I was watching that video until I clicked the back button.


AHTOXA wrote:Hard to say in definitive terms as to how long it's got to live. I had one experience with a master clutch cylinder that went on me very fast. It was not an immediate failure, but it got progressively worse through the drive home. However, I have no idea whether it was seeping before or not.

For a piece of mind, I'd replace it sooner than later. Otherwise, you might end up with pedal going to the floor and not coming up.


Thanks for the heads up. That's what I fear. Stepping on the clutch and it not coming back up.
did you guys replace the civic dx yet??
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Re: Clutch Master Cylinder

Postby theholycow » Tue Nov 10, 2015 7:33 am

Wouldn't fluid level drop a little bit as the clutch wears and the hydraulic system automatically adjusts itself?

I would not jump to the conclusion that there is a leak. The dampness could easily be something else.
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Re: Clutch Master Cylinder

Postby Rope-Pusher » Tue Nov 10, 2015 12:42 pm

Actually, as the clutch wears, the disk gets thinner, the pressure plate moves closer to the flywheel, the diaphragm spring fingers move away from the flywheel / closer to the release bearing, the release bearing piston moves closer to the "compressed" position (as opposed to the "Extended" position), yadda, yadda, yadda excess fluid is forced up into the reservoir.

With Brakes, reservoir level goes down as the pad wear, but with the clutch hydraulic release system, reservoir level goes up.
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Re: Clutch Master Cylinder

Postby AHTOXA » Thu Nov 12, 2015 1:24 pm

theholycow wrote:Wouldn't fluid level drop a little bit as the clutch wears and the hydraulic system automatically adjusts itself?

I would not jump to the conclusion that there is a leak. The dampness could easily be something else.


Could be, but generally there's not much else that could be leaking in the clutch master vicinity, as it is generally mounted inside the cabin above the footbox.
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Re: Clutch Master Cylinder

Postby theholycow » Thu Nov 12, 2015 2:07 pm

Most that I've seen are mounted to the firewall on the engine bay side, with an extra few inches of push rod to reach the pedal.
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Re: Clutch Master Cylinder

Postby bk7794 » Sun Nov 15, 2015 11:05 pm

I'm still thinking of getting a bigger car for longer drives. So no replacement with the DX.

I'm probably going to end up replacing it. Probably after this month. Spent a lot on cosmetic things that needed to be done...like replace some rusted lug nuts, install a cabin filter and such.
Part is only 120 or so, I'm sure something will go wrong like the cotter pin breaking or something.
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Re: Clutch Master Cylinder

Postby SonicHKS » Tue Dec 01, 2015 3:24 am

Uhhh, you don't want to drive it. Its been a couple weeks but if you're still having this problem....get some of the fluid on your finger and smell it. Brake fluid, leak, if not it might just be condensation or something.

If its leaking at all....think about it. Every time you push the pedal its going to leak a little fluid and it won't build full pressure. You're also going to have problems with air getting into the system when you clutch out and the piston moves back. So the pedal will keep getting squishier from less pressure and one day it'll probably **** the bed and the pedal will go to the floor and not come back up. Master cylinders are cheap and easy enough to fix that I wouldn't risk it. You drive it with no clutch pedal and you'll really glaze the clutch, among other problems.

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Re: Clutch Master Cylinder

Postby bk7794 » Tue Dec 15, 2015 4:49 pm

All ordered up. We shall see how it goes.
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Re: Clutch Master Cylinder

Postby Rope-Pusher » Tue Dec 15, 2015 9:06 pm

How mite one, or even two, glaze a clutch that they can't disengage?
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Re: Clutch Master Cylinder

Postby bk7794 » Wed Dec 16, 2015 4:08 pm

Yeah I thought the same thing. But I feared getting stuck somewhere. I've been driving it more lately.
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Re: Clutch Master Cylinder

Postby potownrob » Fri Dec 25, 2015 2:50 am

wait what happened here?? there seems to be a gap in what happened in this thread. :o :? 8)
BUT DEM FAHGLEITZ!! :shock:

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