[Healeys] High clutch

Mon Aug 14 08:44:00 MDT 2023

Thank you Michael.

What I did not say is that the present primary and secondary clutch
hydraulic cylinders have been on the car for many years and, up until
recently, functioned just fine.  The change in pedal performance/actuation
probably "accumulated" and happened gradually in a way that I either did
not notice or I felt to be acceptable, and only when I drove the car after
a few months' inactivity did I feel there was a problem.  Since the clutch
itself had a good many miles and years on it I thought I would start there
and though installing a new pilot bearing, disc and (annular) pressure
plate brought the pedal up a bit it, full actuation/disengagement from the
flywheel is still too close to the floor for my liking.

I'll probably give the system another good bleed and depending upon the
outcome I may be following up on your suggestions.

Best--Michael Oritt

On Mon, Aug 14, 2023 at 10:09 AM Michael Salter <michaelsalter at gmail.com>
wrote:

> Hi Michael, I  would say that you are definitely on the right track.
> If you are certain that there is no air in the system then my guess is
> that you are struggling with " compressability " of the clutch disc.
> They are designed that way to "soften " engagement.
> A slightly larger diameter master or smaller diameter slave should resolve
> the issue but remember that you are dealing with area here so the change in
> displaced volume is the square of the diameter change.
>
> M
>
> On Mon., Aug. 14, 2023, 8:48 a.m. Michael Oritt, <michael.oritt at gmail.com>
> wrote:
>
>> My problem is just the opposite:  After having just replaced the clutch
>> and pressure plate in my 100 the clutch does not *disengage* until
>> almost the extreme of clutch travel:  i.e. when my foot is depressed to the
>> floorboard.  Though my car's clutch was originally mechanical I long ago
>> replaced it with hydraulics after installing a Smitty's Five Speed Toyota
>> transmission conversion.  I have checked the linkage for wear and do not
>> see the usual egging out of holes and the hydraulics seem okay.  Would
>> changing the bore size of either or both cylinders be a fix?
>>
>> Best--Michael Oritt
>>
>> On Sun, Aug 13, 2023 at 10:35 PM Roger Grace <roggrace at telus.net> wrote:
>>
>>> Assuming that there is no significant wear at the linkages and hydraulic
>>> issues, my understanding is that "clutches wear upwards"
>>> So, maybe the plate is worn after 58 years. To my mind mileage is less
>>> important than traffic and start/stop time driving.
>>> Find a hill and note if it slips at the top of pedal movement.
>>> rg
>>>
>>>
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>>>
>>> On Sun, Aug 13, 2023 at 5:05 PM Michael Salter <michaelsalter at gmail.com>
>>> wrote:
>>>
>>>> Thinking more about your clutch issue. Your description of symptoms has
>>>> me confused.
>>>> Am I correct in assuming that what you are experiencing is that the
>>>> clutch starts to release (slip) after depressing the clutch pedal only a
>>>> small distance this being 1 - 2 inches from its normal (undepressed)
>>>> position?
>>>>
>>>> M
>>>>
>>>> On Sun., Aug. 13, 2023, 9:46 a.m. Don via Healeys, <
>>>> healeys at autox.team.net> wrote:
>>>>
>>>>> My 65 BJ8 clutch catches after I depress the pedal about 1 to 2 inches
>>>>> from the rest position . I’ve replaced the clutch master cylinder and the
>>>>> slave cylinder. And I’ve bled the system . There’s. No slipping of the
>>>>> clutch . Car has 60,000 on it with I’m sure the original clutch. Is there
>>>>> any way to make it catch more mid way when I depress the pedal?  I know
>>>>> there are no threaded rods on either the pedal box or at the transmission
>>>>> end . Maybe a different length rod coming out of the slave cylinder?
>>>>>        Thanks , Don
>>>>>
>>>>> Sent from my iPhone
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