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14th December 2014, 15:45 | #1 |
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clutch problem
hi. had a problem with the clutch pedal going to the floor and haveing to bleed and top up the fluid.took the car to my local garage and he changed the master cylinder,made by tazu,and the slave cylinder along with the clutch.the clutch was a good quality LUK. two weeks later the clutch pedal was on the floor and difficulty in changing gear.the garage has now bled the system a number of times including reverse bleeding,this has been going on since june,yet approx every 2 weeks the clutch bite moves to the floor and the gears become difficult to change.the fluid level in the master cylinder does not appear to drop.the mechanic is slightly reluctant to strip it down again to check the new slave as it doesn't seem to be loosing fluid.the chances of the thing failing from new would seem to be pretty bad luck,but on top of this the parts were bought from eurocar parts which went into administration a month later so theres no guarantee on the parts.can anyone suggest any other possible cause.can air get in without fluid getting out?my mechanic is at a loss and it would seem i may have to pay to have it all done again,regards nielsen
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14th December 2014, 16:26 | #2 |
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Hi,
You can have a very small leak somewhere ;not always easy to detect . I used that old trick: 800x600.jpg And found there was the bleed nipple weeping !!! Good luck Last edited by FrenchMike; 14th December 2014 at 16:31.. |
14th December 2014, 16:48 | #3 |
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hi, there's no sign of fluid around or below the bleed nipple or indeed the connector.the clutch must have been bled now over a dozen times so the nipple will have been tightened up differently each time yet each time its 2 weeks and the bite will be at the floor with no visible sign of any fluid loss,nielsen
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14th December 2014, 17:02 | #4 | |
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It was the famous seal/valve simply dirty;here it is situated : THE seal.jpg master seal marks.jpg Mike |
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14th December 2014, 17:23 | #5 |
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hi i'll certainly check that although it'll have to be wednesday.the master cylinder was changed at the same time for a tazu upgraded model so again it would have had to fail from new,nielsen
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14th December 2014, 17:53 | #6 |
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17th December 2014, 17:33 | #7 |
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My car has developed exactly the same problem, not had the car long so not certain of it's clutch history. Got into the car today after a couple of weeks not using it to find it difficult to select gears, nice man from the AA pumped peddle for ages before deciding to open the nipple and try to bleed the system, promptly lost what clutch there was and just couldn't then get any fluid to flow no matter how much pumping we did, so its a tow to garage after Christmas. Doesn't seem to be leaking fluid. Hope when I do manage to get the system bled I only have to do it once and it doesn't keep happening like it is with you. Will check out what French Mike says about the master seal/vale contamination. Keep us posted on how you get on and if you find the problem.
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17th December 2014, 18:25 | #8 |
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Have you tried the reverse bleeding method, by pushing fluid back from the bleed nipple. The suggested way was with a washing up bottle (or a large syringe) of brake fluid connected to a tube on the nipple, open nipple (2 spanners) and squeeze washing up bottle/syringe whilst inverted. Nip up the nipple (using two spanners so as not to break the seal on the pipe to slave connection). Make sure to have another helper with a container/rags/paper towels under the master cylinder to catch the excess fluid which will overflow the reservoir. There is no need to have the pedal pumped using this method and bubbles will flow naturally up to highest level (ie. master cylinder reservoir). You may need to remove some under bonnet components to get to the bleed nipple.(ie. air filter box on a petrol)
Mike
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Oil in my veins! Last edited by roverbarmy; 17th December 2014 at 18:27.. |
17th December 2014, 19:34 | #9 |
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Hi Mike, yes the AA man had a large syringe attached to the nipple but I couldn't see exactly what he was doing and assume he was trying to push fluid through, no movement at all of the fluid or signs of bubbles at the reservoir end. As the car was facing slightly uphill he even jacked up the back end to level up the system. Having read up on posts it seems the first think will be to replace MC seals once the fluid is out and hope that sorts the problem.
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18th December 2014, 11:27 | #10 | |
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Mike
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