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Thread: New Clutch Slipping

  1. #1
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    Exclamation New Clutch Slipping

    Hi Guys,

    I'm new here.

    I put a new clutch and slave cylinder in my Vectra recently and have noticed that the clutch has starting slipping, however it only seems to do it once the car has warmed up or I have been driving it about for a bit. Sometimes it slips when its cold but only sometimes. I also get the odd day were it doesn't slip at all.

    I only started to notice this about 3 weeks ago when i found a leaking boost pipe, i fixed the pipe and the car suddenly had a lot more power. I was happy for about a week and then that's when I started to notice the clutch slipping. This was also a couple of days after a full service and the car had new rear brake pads as well, not sure if this would effect it but I heard that it could cause some brake fluid to return to the reservoir which could be a problem (apparently).

    Also the car went for a while with no cap on the brake fluid reservoir (since before the new clutch was put in). The reservoir hasn't ever overflowed though.

    The car has done no more than a 1000 miles on this new clutch. Its only been in about 5-6 months.

    The biting point is between half and 3/4 of the way up the pedal. Also I noticed when after the clutch was first put in, only happened once or twice but it was riding a tiny bit for a split second or two if you rested your foot on the clutch pedal. However I assumed it was just the clutch bedding in. It never done it ages after that.

    The impression I get is that its more of a problem of the clutch engaging as its a bit temper mental as it sometimes drives fine. I also heard that having no cap on the brake fluid can cause it to absorb moisture from the air which can then cause air bubbles in the hydraulic lines, but wouldn't this cause the pedal to drop or cause problems changing gears as I never have a problem with disengaging the clutch.

    I think that's about it, sorry for the essay, was planning on keeping it short but I thought the more info I can give the better. If anyone has any idea's what the problem could be you would be a big help.

    Thanks in advance!


    Thanks in Advance!

    P.S It's a Vectra C 2.0 DTI (101bhp I Think) on a 54 plate.

  2. #2
    Regular Member MrDerv's Avatar
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    Did the boost pipe split near the intake manifold? I'm thinking you may have oil contamination from the oil vapours collecting in ht epipe and spewing out over the gearbox bell, this may have made it's way onto the clutch plate causing your slipping.

    I can't see any mechanical reason why it would fail after such a short milage.

  3. #3
    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

    Trim : SRI with added X-Pack

    Engine : 1.9 16v 150

    Year : 2006

    Mileage : Near 100K

    Default

    Check no switches on the clutch pedal are stopping the pedal from fully returning, or a faulty self adjusting or badly fitted clutch, oil contamination or faulty DMF

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    Hi MrDerv, Thanks for the reply, i'm sorry I may have worded that last post a bit wrong. I found a split in the rubber connector on the end of a vacuum pipe coming from what i believe to be the boost sensor, the other end connected to something at the front of the car near the front grill and that's the end that had the split. Also there doesn't seem to be any evidence of anything leaking and the bell housing doesn't show any signs of anything leaking on it on its exterior.

    I have read online that it could be possible that trapped air in the master cylinder could cause it not to fully return and prevent the clutch from fully engaging.
    Also is it possible that the master cylinder may need adjusting after the clutch has bedding in? are they even adjustable?

    Thanks Again...

  5. #5
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    I also have a problem with the cruise control, its hard to get on but if i do it often triggers off quickly as if the clutch has pressed when it hasn't, do you think this could be a sign that its something to do with the pedal and/or switches?

  6. #6
    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

    Trim : SRI with added X-Pack

    Engine : 1.9 16v 150

    Year : 2006

    Mileage : Near 100K

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    Possibly a badly adjusted cruise control switch, a 10 second job to fix

  7. #7
    Regular Member MrDerv's Avatar
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    The clutch can be bled easily, 10 mins work should save you a few quid if it sorts it. There's also the clutch pedal return spring, that could be duff

  8. #8
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    Thanks for your replies.

    I will try bleeding the clutch, and also replace the brake fluid incase what I read online is correct. Will also check the pedal and switches and check that they are correctly adjusted.
    I hope this helps because I would hate to have to replace the clutch again after 6 months.

    I will try them things over the weekend and reply here with the results, hopefully I will be happy

    Thanks again for your help!

  9. #9
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    There's also no dodgy noises coming from the clutch when changing gear or anything everything is smooth and quiet when driving. Until the clutch slips and the revs fly up lol

  10. #10
    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

    Trim : SRI with added X-Pack

    Engine : 1.9 16v 150

    Year : 2006

    Mileage : Near 100K

    Default

    Bleeding the clutch fluid will have no effect on a slipping clutch at all, do not waste your time as if its not a cruise control switch the gearbox will have to come out again, Was the old flywheel inspected for heatcracks and play?

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