Delayed action clutch

[ChrisW]

What would you do ?
When cold the clutch is fine.
When warm, there is a notch at the bottom of the clutch pedal and sometimes it feels as if the clutch is suspended around a top dead centre point from where it just may not come back --- hence the feeling of delayed action.
It's playing havoc with any sense of harmonising and balancing the car.
It has been looked at by a specialist who thinks it's OK, --- BUT !
What would you suggest ?
Tnx, Chris.

 

[clubsport]

Hanging clutch is a known 911 problem, normally cured by bleeding the clutch slave cylinder, replacing slave cylinder if a bleed doesn't cure it...or it could be weak/worn springs in the clutch pressure plate....seriously suprised at the diagnosis of your specialist?
One thng I can tell you, is it does not cure itself or get any better, after hanging pedal, the next stage is normally, not being able to select a gear....best to sort in the early stages... worth searching on rennlist forum....good luck. []

 

[65 mat]

Have you had a new clutch fitted recently Chris? If so then the same problem happened to me...Had new clutch fitted when I had gear box work done...clutch was fine when cold however when hot( on road and on a track day!) on about 3 or 4 occasions, the clutch failed to retract to its original position.I literally had to put my toes beneath the pedal in order to pull it back whilst driving (scary!!!).
Fortunately now I have done a few more miles in the car, the problem seems to have stopped completely and I am certain that it will not occur again!
Hope this may put your mind at ease?!

 

[Laurence Gibbs]

i'd seriously doubt that your new clutch was to balme for your hanging pedal. Coincidence at best. As Clubsport describes it's generally either worn out slave & flexible hose, master or clutch plate. New fluid also helps for a while but it often comes back. Another place worth checking is the pedal itself, from memory there is a pin that can wear out and give the symptoms too.

 

[964rsdatabase]

I had the same problem a few years back. Pedal stuck on the floor. New slave cylinder and hydraulic pipe cured the problem.

 

[ChrisW]

Many thanks for this very useful information.

The clutch does not need replacing but is far from new and it may be expedient to replace it at the same time as resolving the hydraulic / mechanical issue(s)with the actuation.

Clubsport, thanks particularly for your advice that it will not improve --- so needs sorting whilst the car is still driveable. On a previous car a slightly squeeky clutch did resolve itself. I'm in for the long haul on this car so it's simply a question of deciding who best to ask to do the job.

 

[johnny senna]

My clutch pedal stuck to the floor in Amsterdam (don't ask). We just yanked it up again and it has been fine since!

 

[clubsport]

Johnny, Until recently I thought your car was unused for nearly a year awaiting engine rebuild?...Did you put a new clutch in while the engine was out?...I would have done.

 

[Jamie Summers]

ORIGINAL: 65 mat

Have you had a new clutch fitted recently Chris? If so then the same problem happened to me...Had new clutch fitted when I had gear box work done...clutch was fine when cold however when hot( on road and on a track day!) on about 3 or 4 occasions, the clutch failed to retract to its original position.I literally had to put my toes beneath the pedal in order to pull it back whilst driving (scary!!!).
Fortunately now I have done a few more miles in the car, the problem seems to have stopped completely and I am certain that it will not occur again!
Hope this may put your mind at ease?!

I have the same symptoms, and the pedal has even gone to the floor once. Jaz investigated when the car was last service and diagnosed a twisted / improperly installed hydraulic pipe. This, however, doesn't seem to have cured the problem ........ I suspect I am in for a new slave cylinder next time ! Anyone have a rough idea of the cost ?

Jamie

 

[clubsport]

Jamie, a clutch slave and flexi hose should cost approx £100 (£60+30+vat)...to remove old one, replace, bleed should take >1hour but not really anymore than 2 hours (can be fiddly reaching up behind gearbox).
On that basis, all in, labour plus vat etc...it should cost more than £200-250 depending who you use.
I did one on a 993, not that hard, just fiddly.

 

[johnny senna]

ORIGINAL: clubsport

Johnny, Until recently I thought your car was unused for nearly a year awaiting engine rebuild?...Did you put a new clutch in while the engine was out?...I would have done.

Yeah, we did fit a new clutch during the rebuild last year.. The Amsterdam incident happened before that.

 

[Melv]

ORIGINAL: clubsport

Johnny, Until recently I thought your car was unused for nearly a year awaiting engine rebuild?...Did you put a new clutch in while the engine was out?...I would have done.

I thnik Johnny needs a crutch now, not a clutch....[]

 

[Jamie Summers]

ORIGINAL: clubsport

Jamie, a clutch slave and flexi hose should cost approx £100 (£60+30+vat)...to remove old one, replace, bleed should take >1hour but not really anymore than 2 hours (can be fiddly reaching up behind gearbox).
On that basis, all in, labour plus vat etc...it should cost more than £200-250 depending who you use.
I did one on a 993, not that hard, just fiddly.

Thanks, v. helpful ! I'll put it on the list for next time the car goes into Jaz.

Jamie

 

[ChrisW]

Well, I've booked the car in for the following:
1. New clutch -- went for the Sachs generic (before Porsche brand it) -- for M003.
2. New actuation fork and bearings (maybe it was just the bearings)
3. New guide tube
4. New slave cylinder
to be done by Andy at RPM.
That should do it.
To be honest, the clutch he did on the Coral car was just the sweetest --- a shame that some pin between the clutch peadle and shaft dropped out --- but it did so twice so there was obviously some mischief at work ! The joys of trying to keep ageing machinery working at it's best.
If that doesn't give me harmony in motion, nothing will.
And at less than £1000 + Vat --- it's just not worth worrying about.
I wish I could fix myself so relatively inexpensively --- I have to keep telling myself it's money in the pension plan.
NO tax on capital gains on motor cars --- one day !

P.S. Thanks for all your help !!

 

[johnny senna]

ORIGINAL: Melv

ORIGINAL: clubsport

Johnny, Until recently I thought your car was unused for nearly a year awaiting engine rebuild?...Did you put a new clutch in while the engine was out?...I would have done.

I thnik Johnny needs a crutch now, not a clutch....[]

Damn!! [] Those crutch strap / anti-submarine straps are HAAAAAARSH!!!!!!!!!!
After a crash like that, all the paramedic could do was count them..........

 

[65 mat]

ORIGINAL: ChrisW

Well, I've booked the car in for the following:
1. New clutch -- went for the Sachs generic (before Porsche brand it) -- for M003.
2. New actuation fork and bearings (maybe it was just the bearings)
3. New guide tube
4. New slave cylinder
to be done by Andy at RPM.
That should do it.
To be honest, the clutch he did on the Coral car was just the sweetest --- a shame that some pin between the clutch peadle and shaft dropped out --- but it did so twice so there was obviously some mischief at work ! The joys of trying to keep ageing machinery working at it's best.
If that doesn't give me harmony in motion, nothing will.
And at less than £1000 + Vat --- it's just not worth worrying about.
I wish I could fix myself so relatively inexpensively ---  I have to keep telling myself it's money in the pension plan.
NO tax on capital gains on motor cars --- one day !

P.S. Thanks for all your help !!

Can't go wrong with the guys at RPM Chris! Top blokes....you know where you stand with them!

 

[ChrisW]

'Had them also repair a leaking rear window which had "beaten" Autofarm twice -- Nick sorted it.

I appreciate that sometimes this kind of thing can be quite tricky, but they do seem to take great care.