[Healeys] Clutch-related noise

[i erbs]

One of the issues with the Smitty kit is making a new fulcrum bolt for the
clutch arm. if the new bolt is not is not adjusted to right length, the
bearing could not fully disengage.   I found my instruction booklet and it
shows a Toyota Roller Throw out bearing.
1. The fulcrum arm bolt is the wrong length or warn down a bit from use or
The slave cyl push rod is the wrong length resulting in the bearing not
disengaging.

Ira Erbs
Portland,OR
      _______                                  _______
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          BT7 engine and disk brakes
*Aerodynamics are for people who can’t build engines.* – *Enzo Ferrari*
Please excuse random auto corrects and misspelled words

On Mon, Dec 12, 2016 at 2:48 AM, Oudesluys <coudesluijs at chello.nl> wrote:

> Brian,
> A Toyota gearbox is installed so it is highly likely that a modern clutch
> (roller) bearing is fitted instead of a carbon one. It is also likely that
> the clutch set up is different from the original. A slave cylinder is
> usually adjustable by moving/shimming/clamping it away from the clutch fork
> or by an adjustable piston rod. It is imperative to have clearance between
> clutch pressure plate and thrust bearing, being it carbon (especially
> carbon) or roller type.
> The input shaft bearing is hardly the cause. It must be very worn before
> it plays up as the shaft is also supported by the pilot bearing. Very
> unusual and it makes a more grumbling noise, but it could be a possibility
> Cheers,
> Kees
>
>
> Op 12-12-2016 om 6:14 schreef Brian Drab:
>
> Kees, I assume by clutch bearing, you mean the clutch throw-out or release
> bearing. On a BJ8, these have a solid carbon contact surface and do not
> move other than in or out depending on the pedal motion. I literally just
> replaced that bearing on a BJ8. I do realize that there is much more
> expensive throw out bearing that does utilize ball or roller bearings but I
> have never actually seen one of these.
>
> I know of no way to increase the pedal travel on a BJ8. The pedal to
> master cylinder is non adjustable and the slave cylinder to clutch is also
> non adjustable.
>
> When I mentioned, in an earlier post, the input shaft bearing of the
> transmission - this shaft is at engine speed with the clutch released, and
> motionless when the clutch pedal is depressed, which allows one to select
> gears without grinding them. Road speed has no influence on the
> transmission input shaft. I had exactly this problem on a vehicle (not a
> Healey) and that was the problem and was solved by replacing that  bearing.
>
> I certainly don’t know if that is the problem in this case but, to me, it
> is the only logical thing that is moving at engine speed (not road speed)
>  with the clutch released and the only thing that would be motionless
> (relatively speaking) when the clutch pedal is depressed.
>
> Brian Drab
>
>
>
> *From:* Healeys [mailto:healeys-bounces at autox.team.net
> <healeys-bounces at autox.team.net>] *On Behalf Of *Oudesluys
> *Sent:* December 11, 2016 1:28 AM
> *To:* healeys at autox.team.net
> *Subject:* Re: [Healeys] Clutch-related noise
>
>
>
> The clutch pedal may have to little travel before engaging, leaving the
> clutch bearing spinning around with no or little load which can cause this
> kind of noise.
> Try increasing the pedal travel slightly.
> Kees Oudesluijs
>
>
>
> Op 10-12-2016 om 22:57 schreef Michael Oritt:
>
> While driving today I noticed a new noise: A faint but constant whining/
>
> purring sound that is present when the clutch pedal is NOT depressed,
> whether in neutral or in gear and whether in motion or sitting still.
>
>
>
> When I depress the clutch pedal the sound goes away. Clutch and
> transmission operation seem normal. BTW I have a Toyota five-speed with a
> BJ8 diaphragm clutch.
>
> Thoughts please?
>
>
>
> Best--Michael Oritt
>
>
>
>
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