Lotus Elan

Strange clutch problem

PostPost by: Nigel Furness » Tue Jul 19, 2005 8:59 am

Hi all
Please may I tap in to your fountain of collective
wisdom? After 30 years plus of Elan ownership it
never ceases to amaze me when a new trick appears.
The other evening, my S4SE sufddenly lost all free
motion in the clutch pedal and the pedal took up a
slightly higher position than usual. At the same
time, a degree of clutch slip was evident in top gear.
Since the clutch asssembly was a heavy duty item from
QED about 3 years ago and has only done 3200 miles
(approximately) I was loath to suspect the cover. I
had a quick look underneath and adjusted the operating
rod until there was tiny bit of lost motion in the
pedal again and all was well, or so I thought. 50
miles later the same thing happened again. Is this
some strange hydraulic problem in the master or slave
cylinder or is it some portent of imminent
catastrophic failure of the clutch cover assembly?
Before I start to take out the engine for the second
time in 3 years I'd appreciate some comments!
Many thanks
Nigel Furness
1970 S4SE, 1760cc L2 cams/Spyder driveshafts/Quaife
LSD in case that's relevant.



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Nigel Furness
 

PostPost by: "Sean Murray" » Tue Jul 19, 2005 9:25 am

Nigel

It may be that the master cylinder is not releasing hydraulic pressure owing to insufficient pushrod retraction when released, or a faulty release valve. Being a Plus 2 man, I'm not familiar with the layout on the S4, butyou could try loosening the master cylinder pipe union the next time the problem occurs to check if pressure is trapped.

Sean Murray
----- Original Message -----
From: Nigel Furness
To: ***@***.***
Sent: Tuesday, July 19, 2005 9:58 AM
Subject: [LotusElan.net] Strange clutch problem


Hi all
Please may I tap in to your fountain of collective
wisdom? After 30 years plus of Elan ownership it
never ceases to amaze me when a new trick appears.
The other evening, my S4SE sufddenly lost all free
motion in the clutch pedal and the pedal took up a
slightly higher position than usual. At the same
time, a degree of clutch slip was evident in top gear.
Since the clutch asssembly was a heavy duty item from
QED about 3 years ago and has only done 3200 miles
(approximately) I was loath to suspect the cover. I
had a quick look underneath and adjusted the operating
rod until there was tiny bit of lost motion in the
pedal again and all was well, or so I thought. 50
miles later the same thing happened again. Is this
some strange hydraulic problem in the master or slave
cylinder or is it some portent of imminent
catastrophic failure of the clutch cover assembly?
Before I start to take out the engine for the second
time in 3 years I'd appreciate some comments!
Many thanks
Nigel Furness
1970 S4SE, 1760cc L2 cams/Spyder driveshafts/Quaife
LSD in case that's relevant.



___________________________________________________________
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snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com





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PostPost by: "e s" » Tue Jul 19, 2005 2:03 pm

As the clutch wears, the clutch fork moves toward the slave cylinder. ti issupposed to be adjusted so that the hydraulic fluid will take up the slack. Eventually it has to be readjusted when the rod bottoms out in the slave cylinder. I beleive you have reached this point. You can do it in place or you may find it easier to pop the snap ring and take the rod out , adjust it shorter and reinstall.
----- Original Message -----
From: "Sean Murray" <***@***.***>
To: ***@***.***
Subject: Re: [LotusElan.net] Strange clutch problem
Date: Tue, 19 Jul 2005 10:24:36 +0100



Nigel

It may be that the master cylinder is not releasing hydraulic
pressure owing to insufficient pushrod retraction when released,
or a faulty release valve. Being a Plus 2 man, I'm not familiar
with the layout on the S4, but you could try loosening the master
cylinder pipe union the next time the problem occurs to check if
pressure is trapped.

Sean Murray
----- Original Message -----
From: Nigel Furness
To: ***@***.***
Sent: Tuesday, July 19, 2005 9:58 AM
Subject: [LotusElan.net] Strange clutch problem


Hi all
Please may I tap in to your fountain of collective
wisdom? After 30 years plus of Elan ownership it
never ceases to amaze me when a new trick appears.
The other evening, my S4SE sufddenly lost all free
motion in the clutch pedal and the pedal took up a
slightly higher position than usual. At the same
time, a degree of clutch slip was evident in top gear.
Since the clutch asssembly was a heavy duty item from
QED about 3 years ago and has only done 3200 miles
(approximately) I was loath to suspect the cover. I
had a quick look underneath and adjusted the operating
rod until there was tiny bit of lost motion in the
pedal again and all was well, or so I thought. 50
miles later the same thing happened again. Is this
some strange hydraulic problem in the master or slave
cylinder or is it some portent of imminent
catastrophic failure of the clutch cover assembly?
Before I start to take out the engine for the second
time in 3 years I'd appreciate some comments!
Many thanks
Nigel Furness
1970 S4SE, 1760cc L2 cams/Spyder driveshafts/Quaife
LSD in case that's relevant.



___________________________________________________________
How much free photo storage do you get? Store your holiday
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com





To search the mailing list archives:
http://www.escribe.com/automotive/europ ... index.html


http://www.lotuselan.net/publish/legal_stuff.shtml



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b.. To unsubscribe from this group, send an email to:
***@***.***

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"e s"
 

PostPost by: Guest » Tue Jul 19, 2005 10:42 pm

Nigel

Had a similar problem with my brakes when I first got my s3/SS (Dual mastercylinder), so I agree with Sean, when it happen again just crack the pipe gland and see if this fixes the problem. If it does then you will have to adjust the master cylinder to pedal position. A gasket between the master cylinder and the firewall could be enough or you might have to shorten the push rod. It seems strange that this could just start happening, but it couldbe a faulty valve in the master cylinder. I would start here first as it is a lot easier than pulling the clutch.

Rod

Rodney Stevens
CSIRO Minerals
http://www.minerals.csiro.au

Ph. 61 2 97106701
Fax 61 2 97106789

Personal Home Page
http://mywebpage.netscape.com/rodjohnst ... mepage.htm



-----Original Message-----
From: ***@***.***lto:***@***.***
Behalf Of Nigel Furness
Sent: Tuesday, 19 July 2005 6:58 PM
To: ***@***.***
Subject: [LotusElan.net] Strange clutch problem


Hi all
Please may I tap in to your fountain of collective
wisdom? After 30 years plus of Elan ownership it
never ceases to amaze me when a new trick appears.
The other evening, my S4SE sufddenly lost all free
motion in the clutch pedal and the pedal took up a
slightly higher position than usual. At the same
time, a degree of clutch slip was evident in top gear.
Guest
 

PostPost by: Nigel Furness » Wed Jul 20, 2005 1:07 pm

Hi all
Many thanks for the answers to this, I left it 3 days
before looking at the problem again thinking that if
it were a hydraulic pressure buildup it might seep
away gradually but unfortunately it didn't. I've
adjusted the slave cylinder pushrod again to what I
think is the correct clearance and there is no
noticeable clutch slip accelerating hard up my
favourite hill in top gear. I found it was quite easy
to adjust (it obviously benefited from the coating of
Copaslip I gave it when I changed the chassis) so
didn't need to remove the push rod from the cylinder.
It will be interesting to see how long it lasts. I
suspect the reason I've never noticed this before is
that I rarely have an engine in an Elan for more than
30,000 miles before it has to come out for something,
and this car is on its third chassis with me and I've
automatically replaced the clutch every time, so
perhaps I've never worn one out! But at only 3000+
miles I can't see that the clutch should have worn out
yet. I will certainly overhaul the master cylinder
before unzipping the engine from the chassis though.
Many thanks to those who responded.
Nigel Furness



___________________________________________________________
How much free photo storage do you get? Store your holiday
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com
Nigel Furness
 

PostPost by: "e s" » Wed Jul 20, 2005 3:39 pm

I think it likely you left it just a tad tight on assembly...gee, I've never done that.........


----- Original Message -----
From: "Nigel Furness" <***@***.***>
To: ***@***.***
Subject: [LotusElan.net] Re:Strange clutch problem
Date: Wed, 20 Jul 2005 14:07:29 +0100 (BST)


Hi all
Many thanks for the answers to this, I left it 3 days
before looking at the problem again thinking that if
it were a hydraulic pressure buildup it might seep
away gradually but unfortunately it didn't. I've
adjusted the slave cylinder pushrod again to what I
think is the correct clearance and there is no
noticeable clutch slip accelerating hard up my
favourite hill in top gear. I found it was quite easy
to adjust (it obviously benefited from the coating of
Copaslip I gave it when I changed the chassis) so
didn't need to remove the push rod from the cylinder.
It will be interesting to see how long it lasts. I
suspect the reason I've never noticed this before is
that I rarely have an engine in an Elan for more than
30,000 miles before it has to come out for something,
and this car is on its third chassis with me and I've
automatically replaced the clutch every time, so
perhaps I've never worn one out! But at only 3000+
miles I can't see that the clutch should have worn out
yet. I will certainly overhaul the master cylinder
before unzipping the engine from the chassis though.
Many thanks to those who responded.
Nigel Furness



___________________________________________________________
How much free photo storage do you get? Store your holiday
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com


--
_______________________________________________
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http://datingsearch.lycos.com
"e s"
 

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