GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Topic started by: Oilslick on 26 June 2021, 16:43
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Hi all,
Just started up the car, clutch hit the floor and didn’t come back up.
Have been driving with no signs of clutch issue. Don’t see any obvious fluid leaks.
Did have the water pump changed few thousand miles ago.
I can lift it up manually and it stays up, then when I depress it stays stuck to the floor.
Any ideas? Or do I need to get it towed to a garage?
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This happened to mine last year and the cause was a leak in the hydraulic system after some other work had been done on the car. In my case there was hardly any fluid loss. Check your brake fluid reservoir and if it looks slightly low a leak is the most likely cause.
There could be other causes though so wait for other feedback.
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Did a Tiguan a while back suffering the same issue, turned out to be the clutch master cylinder.
Not saying yours will be the same but changing the master cylinder is a whole lot easier than changing the slave cylinder which requires the gearbox to be removed.
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On further inspection it looks like there’s no clutch/brake fluid in the reservoir and a very small puddle directly under the air box.
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You'll see where the clutch hose connects to a plastic connector with the bleed nipple.
I would make sure the bleed nipple is snugged up, 7 or 8mm spanner.
Make sure the hose is properly seated into the plastic housing, and the housing is seated onto the pipe coming out the top of the gearbox.
Ignore the arrows in this pic.
(https://i.postimg.cc/90JjWwJs/IoXgrZT.jpg) (https://postimg.cc/QK9zmCLq)
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Is that under the air box?
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It is indeed.
Should be able to see it without removing the airbox.
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Topped up the clutch fluid and pumped the pedal and it’s come back to life.
Will check for leaks but is that normal behaviour? Fluid drops below x amount and it cuts the clutch?
Level didn’t look to be below min on the reservoir.
Also I just topped it up, assuming there’s no need to bleed it despite the pedal having disappeared?
Tia
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Because the clutch uses the same reservoir as the brakes, the fluid feed in the reservoir is ¾ the way up so if the clutch line/hose/slave cylinder leaks it doesn't leak all the fluid out of the fluid reservoir leaving no fluid for the brakes - brake failure.
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Makes sense, thanks.
No need to bleed is there?
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If the pedal is nice and firm, not really, good practice to bleed but if your not sure what your doing could end up with no pedal at all.
Must be a reason though why it's used some fluid??
Have you found the cause of the fluid under the airbox??
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No, can’t find the cause this far.
Fluid remains to the top since I refilled, no signs of leaks.
The pedal was half way down today when I got in it today but flicked it up and pedal was firm, no issues since then
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Did you get any repeat of this?, ours has done this today, pedal stuck and when lifting back up there is only small pressure, no pressure when going down, hope its just the slave cylinder thats gone.
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Doesn't it have a concentric slave?
If so the whole gearbox will need to come off, and whilst you are in there you may as well fit a new clutch.
I would be tempted to change the master first as it will be a much simpler job.
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Get it checked, my wife kept complaining it was happening in her Polo, I couldn’t replicate the fault, but took it to local Indy (used loads of time). After examination, confirmed it was the slave so Gearbox out - got a new clutch at the same time due to mileage - seemed sensible.
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Ive topped up the brake fluid and the clutch is working again, seems I have a leak, and probably from the slave ffs, has anyone changed there clutch to an uprated one?, might as well as its mapped stage 1
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The person who invented concentric slave cylinders should be shot.
Who in their right mind would put a part like that in a place that requires the gearbox to be removed when it fails?
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Shooting would be to quick.
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It depends where you shoot them. :evil:
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The person who invented concentric slave cylinders should be shot.
Who in their right mind would put a part like that in a place that requires the gearbox to be removed when it fails?
Some crazy Krout, bloody stupid idea
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The slave cylinder on my GTI PP gave up the ghost last Wednesday, with a nice pool of fluid over the garage floor. Thankfully, this is being replaced under warranty (along with 2 x control arm bushes owing to creaking front suspension). According to the dealer, the clutch looked OK but I opted to get a new one fitted at a parts only cost of £397. Car is also getting MOT’d and serviced at the same time.
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Yep seems to be a common failure on the whole VAG range :whistle: