Lotus Elan

clutch

PostPost by: rodlittle » Mon Sep 17, 2012 12:26 pm

Well I managed to get the car (1963 S1) together enough to get to Goodwood on saturday but the clutch is horrific,
Its only got about 1/2 " travel in to out and its a hard push needed too. Trouble is I rebuilt the engine etc over 15 years ago and when it came to putting them in the body earlier this year I just sort of assumed they were ok as I couldnt remember what I had done to the clutch I assumed Id fitted a new plate and cover but my memory is not good enough to be sure, I did run the engine before it went in as I didnt want to have to take it out again but now it looks as if I will have to remove it. Before I do has anyone got any better ideas.
rod
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PostPost by: ken ob » Mon Sep 17, 2012 12:38 pm

Yes i have a good idea - sell the car to me !!!!
:lol:
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PostPost by: rodlittle » Mon Sep 17, 2012 12:51 pm

sorry thats not a better idea :D
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PostPost by: Chancer » Mon Sep 17, 2012 1:12 pm

Clutch slave cylinder too small a diameter or master cylinder too large? Or even both!

Is it just as heavy if you very very slowly depress the clutch pedal? I once had this problem with a mini that I slowly rebuilt, the steel rigid clutch line had rusted internally and was almosy completely blocked, I believe that a swollen flexible can do the same.

Do you know the provenance of your pressure plate? I once had one rebuilt with stronger springs for a cerametallic clutch and it was impossibly heavy, it was cable operated so my options were limited.
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PostPost by: lotusfan » Mon Sep 17, 2012 2:14 pm

Rob

Have a read of the following thread, particulary the last post about adjusting the push rod, it may be relevant. I found the WSM unclear to say the least.

elan-f15/clutch-slave-cylinder-piston-pushed-out-t25748.html

My only other comment would be to remove the grommet that the release lever goes through and have a look inside at the clutch and release bearing.

I have enjoyed following your restoration, some lovely work there.
Mike
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PostPost by: rodlittle » Mon Sep 17, 2012 2:39 pm

It may be that I have the wrong size master cylinder, I did change it as the old one was broken I must check that before I do anything drastic.
thanks all for your comments/suggestions
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PostPost by: AHM » Mon Sep 17, 2012 9:57 pm

Also check the slave - the cortina one looks identical but has a smaller piston.
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PostPost by: fatboyoz » Mon Sep 17, 2012 10:09 pm

Rod,
The master should be 5/8" and the slave should be 7/8". I have just recently had both of mine sleeved with stainless steel. The slave was only a couple of years old, but was corroded and starting to leak. I think the slave was letting air into the system before the leak manifested itself with resulting reduced, pedal effectiveness. The system was a bugger to bleed when back together. Kept at it for a couple of days when the last of the air bubbles was liberated.
Regards,
Colin.
P.S. Am trying silicon (DOT 5) fluid this time.

rodlittle wrote:It may be that I have the wrong size master cylinder, I did change it as the old one was broken I must check that before I do anything drastic.
thanks all for your comments/suggestions
rod
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PostPost by: rodlittle » Wed Sep 19, 2012 1:41 pm

Spot on diagnosis guys thanks. Just removed the slave and sure enough its 3/4
havent got to the master yet.
thanks again
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PostPost by: rodlittle » Wed Sep 19, 2012 2:23 pm

Lo and behold the master is 3/4 also so thats too big and the slave is too small. problem solved I think now all I have to do is find or refurbish the correct ones
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PostPost by: Bud English » Wed Sep 19, 2012 6:09 pm

I sourced a new master cylinder on UK eBay earlier this year. I'm not to the stage in my rebuild to have installed it. When I read this thread I thought I'd better have a check. Sure enough, it's a 3/4" unit as well. That's probably what I get buying an advertised "elan" part from a Triumph specialist.

Once again the picture looked right and the price was too good to pass up, even with postage. I'm guessing my price, reselling it, will look good to someone as well. I'll call out the bore size when I post it though. ...now to find the correct one.
Last edited by Bud English on Thu Sep 20, 2012 2:25 pm, edited 1 time in total.
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PostPost by: rodlittle » Thu Sep 20, 2012 8:57 am

For anyone who needs them I have found the following company which will supply clutch cylinders from stock.

PowerTrack Ltd
Tel/fax (01753) 842680
International +0044 1753 842680
- Worldwide suppliers of obsolete Lockheed and Girling Brake/ Clutch Components

No connection to me :D

prices are 5/8" Master cylinder ?49.50 for genuine girling part with metal cap
7/8" slave cylinder ?39.50 both +vat

best prices I could find!!
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