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Old 19 Sep 2003, 11:53 pm
Rock Kent
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Default Bad Clutch Master Cylinder?

Hi All,

I have a '94 vtec del sol with 77k miles on it. I've had it only for about
three months and had zero problems with it in that time.

My clutch went away this evening on the drive home from work. Over a period
of about 20 minutes, it got progressively worse until it was hard to put the
tranny in each gear, it felt like the synchro's were working real hard, and
the clutch was engaging almost immediately as the clutch pedel barely came
off the floor.

I checked the fluid level when I got home and it was OK.

I think my master cylinder is gone, but I'm not sure. I guess the
alternative would be that something has gone south with the disk and
pressure plate. I don't hear any unusual noises.

So, any way to confirm that the master cylinder is bad before running off
and buying a replacement?

Is an OEM Honda replacement the best way to go?


Thanks for your input.
-rock-


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Old 20 Sep 2003, 07:33 am
wdb
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Default Re: Bad Clutch Master Cylinder?

Hi,
If the disk and pressure plate went south, you would have a badly chattering
or slipping clutch. Your's sounds as if it is not fully disengaging. I think you
are on the right track with respect to the hydro system. This type of clutch
system is great when it works in that you have much less pedal pressure, but
when something goes wrong, you don't always get much warning. I would have the
whole system checked out. It could be at either the master cylinder or driven
cylinder and as well as a bad line or a plugged line.
B.B.

Rock Kent wrote:

> Hi All,
>
> I have a '94 vtec del sol with 77k miles on it. I've had it only for about
> three months and had zero problems with it in that time.
>
> My clutch went away this evening on the drive home from work. Over a period
> of about 20 minutes, it got progressively worse until it was hard to put the
> tranny in each gear, it felt like the synchro's were working real hard, and
> the clutch was engaging almost immediately as the clutch pedel barely came
> off the floor.
>
> I checked the fluid level when I got home and it was OK.
>
> I think my master cylinder is gone, but I'm not sure. I guess the
> alternative would be that something has gone south with the disk and
> pressure plate. I don't hear any unusual noises.
>
> So, any way to confirm that the master cylinder is bad before running off
> and buying a replacement?
>
> Is an OEM Honda replacement the best way to go?
>
> Thanks for your input.
> -rock-



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  #3 (permalink)  
Old 22 Sep 2003, 02:07 pm
Bill B. Johnson
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Posts: n/a
Default Re: Bad Clutch Master Cylinder?

In article <bkgmg8$a2n$1@quark.scn.rain.com>, "Rock Kent"
<rockkent@cascadeaccess.com> wrote:

> Hi All,
>
> I have a '94 vtec del sol with 77k miles on it. I've had it only for about
> three months and had zero problems with it in that time.
>
> My clutch went away this evening on the drive home from work. Over a period
> of about 20 minutes, it got progressively worse until it was hard to put the
> tranny in each gear, it felt like the synchro's were working real hard, and
> the clutch was engaging almost immediately as the clutch pedel barely came
> off the floor.
>
> I checked the fluid level when I got home and it was OK.
>
> I think my master cylinder is gone, but I'm not sure. I guess the
> alternative would be that something has gone south with the disk and
> pressure plate. I don't hear any unusual noises.
>
> So, any way to confirm that the master cylinder is bad before running off
> and buying a replacement?
>
> Is an OEM Honda replacement the best way to go?
>
>
> Thanks for your input.
> -rock-


You might want to have it checked my a mechanic that you trust befor you
spent any money on the problem. For example, the problem might not be
related to the master cylinder and you would be wasting your money if you
fixed it and the problem remained. I don't know of a way to confirm
whether or not the master cylinder is bad.
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  #4 (permalink)  
Old 26 Sep 2003, 05:02 pm
Rex B
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Posts: n/a
Default Re: Bad Clutch Master Cylinder?

On Mon, 22 Sep 2003 12:07:06 -0700, billbjohnson555@nospamhotmail.com (Bill B.
Johnson) wrote:

|In article <bkgmg8$a2n$1@quark.scn.rain.com>, "Rock Kent"
|<rockkent@cascadeaccess.com> wrote:
|
|> Hi All,
|>
|> I have a '94 vtec del sol with 77k miles on it. I've had it only for about
|> three months and had zero problems with it in that time.
|>
|> My clutch went away this evening on the drive home from work. Over a period
|> of about 20 minutes, it got progressively worse until it was hard to put the
|> tranny in each gear, it felt like the synchro's were working real hard, and
|> the clutch was engaging almost immediately as the clutch pedel barely came
|> off the floor.
|>
|> I checked the fluid level when I got home and it was OK.
|>
|> I think my master cylinder is gone, but I'm not sure. I guess the
|> alternative would be that something has gone south with the disk and
|> pressure plate. I don't hear any unusual noises.
|>
|> So, any way to confirm that the master cylinder is bad before running off
|> and buying a replacement?
|>
|> Is an OEM Honda replacement the best way to go?
|>
|>
|> Thanks for your input.
|> -rock-
|
|You might want to have it checked my a mechanic that you trust befor you
|spent any money on the problem. For example, the problem might not be
|related to the master cylinder and you would be wasting your money if you
|fixed it and the problem remained. I don't know of a way to confirm
|whether or not the master cylinder is bad.


A clutch master cylinder is a single-stage unit. If it's leaking fluid by the
seals (which the symptoms suggest) it has to go out the back of the unit, where
the pedal pushrods goes in. If it just started, the leakage may be very small.
Look for a small amount of brake fluid, or even bubbled paint, where the master
cylinder mounts.

The other possibility is the slave cylinder, which is mounted on the
bellhousing. On most cars the slave cylinder will fail first. Thankfully, it's
also usually the cheapest and easiest to fix (unless it's annular like SAAB).

Your problem almost has to be one of these two.
Usually a leaking master cylinder will respond to pumping, while a slave
cylinder will not. If you can ease shifting - or get it into gear - by pumping
the pedal 3 times rapidly (pump-pump-pump-shift), then your problem is likely
the MC.

Good luck.


Rex in Fort Worth
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