2004 vectra c diesel clutch pedal to floor. Garage changed csc,master cylinder, return spring but pedal still drops to floor. Not loosing any fluid been bled numerous times.Any ideas??

The clutch cylinder and brake are fed off the same reservoir, but we get them separately from chrysler. Dot 3 fluid also.
Here is some info, and a picture of the system.

The clutch hydraulic system is responsible for engaging and disengaging the clutch. Depressing the clutch pedal develops fluid pressure in the clutch master cylinder. This pressure is transmitted to the integral release bearing which is in contact with the pressure plate diaphragm spring. As additional force is applied, the bearing depresses the diaphragm spring fingers inward on the fulcrums. The action moves the pressure plate rearward, relieving clamping force on the clutch disc.




The typical clutch hydraulic system consists of a clutch master cylinder (4) Concentric Slave Cylinder (CSC) and an interconnecting fluid line (2). Clutch hydraulic fluid is supplied by the brake system via the brake master cylinder reservoir (1). The clutch pedal pushrod (3) is non-adjustable.

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slave cylinder.

Your Clutch slave cylinder may be bad.here's a link to it. SAVE 20 GET 10 GIFT CARD ON ONLINE SHIP TO HOME ORDERS OF 100 OR MORE Here's a link to a new one. http://www.autozone.com/drivetrain/clutch-slave-cylinder/duralast-clutch-slave-cylinder/nissan-datsun/maxima/2005/6-cylinders-b-3-5l-sfi-dohc/557935_0_0

it shounds as though your master cylinder might not be pumping any fluid.

if you are not loosing fluid in clutch master cylinder than the master cylinder is goin bad. if you are loosing fluid than the slave cylinder is leaking and will have to be rebuilt or replaced. this is a simple answer ,but you didnt give much detail of your vehicle so . this is the best answer i can give

probably have a leak in the system somewhere fill it up with the proper fluid push pedel slowly while someone inspects the clutch lines lines and slave cylinder, and master cylinder to see where its coming from, there not too many parts in the clutch system. the slave sylinder may be internal which would make it harder to inspect but not inpossible

You have to pre bleed the master cylinder or it will never work. Parts stores sell a tubing kit for this job. essentailly a hose goes from the output to the fluid reservior. Your clutch pedal sounds like it has spring assist. so you need to manually pull it back... It may be easier to pull the cylinder and bench bleed....

anyways, do not let fuid run low while bleeding the rest of the system.

these are very hard to bleed, also check your fire wall for damage where the clutch master bolts up. another thing is take a good look at the clutch pedal asm, the frame sometimes wears and cracks so you loose a little pedal travel.another thing is a bad preasure plate,spring breaks on plate,

If no fluid loss,then i would squeeze the fluid line (rubber part) to the slave cylinder. If you now have pressure in the pedal replace the slave cylinder. If still no pressure then change the clutch master cylinder.