Seeking Advice on Clutch Master Cylinder Issues
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Hoping someone can provide guidance. I've recently installed my second new clutch master cylinder. The first one didn't allow fluid to return to the reservoir, and now this new one isn't transferring fluid from the reservoir to the master cylinder. Has anyone else encountered this issue and might know what's wrong?
- cuthbertdavies
- New-tral
- Posts: 1
- Joined: 21 Feb 2024
- Location: United States
Did you transfer an 'original' push rod from your old cylnder. The new cylinders don't come with a correct length pushrod and will cause the problems described.
- lotusposition
- First Gear
- Posts: 28
- Joined: 10 Oct 2015
- Location: Dorset
lotusposition wrote:Did you transfer an 'original' push rod from your old cylnder. The new cylinders don't come with a correct length pushrod and will cause the problems described.
+1
The piston in the master cylinder has to return all the way to the stop (the circlip) when the clutch pedal is released. There is a small valve at the end of the master cylinder which closes off the pathway to the reservoir when the pedal is depressed. If the piston can't return all the way to the stop, then the valve never opens.
The usual cause is the push rod attached to the pedal being too long (as described above), or the pedal not returning all the way because it is stiff, bent, or something is in the way.
68 Elan S3 HSCC Roadsports spec
71 Elan Sprint (still being restored)
32 Standard 12
Various modern stuff
71 Elan Sprint (still being restored)
32 Standard 12
Various modern stuff
- Andy8421
- Coveted Fifth Gear
- Posts: 1271
- Joined: 27 Mar 2011
- Location: Surrey, UK
For reference the correct pushrod should be 82mm overall length - 80mm to underside of mushroom head.
Roger
S4 DHC
S4 DHC
- oldelanman
- Coveted Fifth Gear
- Posts: 1985
- Joined: 02 Jan 2008
- Location: Dorset UK
I'd agree entirely. I had the same issue years ago on my first Elan. Swapped back to the original pushrod, and all was well.
Current :- Elan S3 DHC SE S/S 1968,
1963 Alfa Giulia Ti Super Rep.
Previous :-
Elan S3 DHC SE SS 1968,
Elan S3 DHC S/E 1966
Elan S3 FHC Pre-Airflow 1966
1963 Alfa Giulia Ti Super Rep.
Previous :-
Elan S3 DHC SE SS 1968,
Elan S3 DHC S/E 1966
Elan S3 FHC Pre-Airflow 1966
- elans3
- Fourth Gear
- Posts: 516
- Joined: 12 Sep 2003
- Location: Doncaster, South Yorks.
I had the correct pushrod, but it was worn and the rattling in the pedal assembly was annoying. It is possible to get a threaded rod and separate clevises if you need them.
- ill_will
- Third Gear
- Posts: 251
- Joined: 18 Apr 2008
- Location: SE London, UK
Had this exact issue yesterday--ended up the flex hose going to the clutch slave was blocked---new hose, all good now
- yellowS4
- New-tral
- Posts: 2
- Joined: 11 Jan 2024
- Location: Tasmania
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