ANOTHER clutch bleed topic..just a little urgent

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Kizzeh

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Got a man comming to look at my freelander tomorrow, thought i would do some last minute checks on it, make sure everything was absolutely 100%. Its the little things that make the difference for me when i buy a car. Daft things like handbrake travel and proper wheel alignment can make all the difference when im looking at a car.

Not only have i had it fully cleaned and serviced, put an mot on it and done a few of the little things like new wiper blades and adjust the handbrake, i noticed there was a small amount of play in the clutch pedal. Nothing thats indicating any parts worn, certainly not as bad as others i have felt but as i said, its the smallest things that make all the difference.
I have read on here about people bleeding the clutch before, and i thought as the van is 9 years old its probably needs some fluid change and that might improve the pedal feel.

So as i am sure you have all heard people doing before, i checked and topped up the reservoir, got the missus to jump in the hot seat whilst i cracked off the bleed nipple and got her to do a few pumps. Tighten the bleed screw and tell her to go back to whatever life or death tv program she was watching and cant possibly miss.

So i jump back in the van and give the pedal a feel. Nothing. Sat on the floor like its full of air. I trace the pipe from the bleed nipple and it goes up to the master cylinder. I realise that i had been looking at the brake reservour (and how many times have i read about people doing that??) and i see a lid on the master cylinder. fluid must go in there methinks, probably just ran out of fluid. So i take the lid off and read what it says on the top. Along the lines of dont remove lid. COCK

So i run inside and look for a quick clutch bleed tutorial and find This one

Easy i say, i will just carefully bleed it.

I start off by having the perfect size bit of metal wedged between the seat and the clutch pedal holding it down. Open bleed screw, fluid everywhere. close bleed screw. take metal off pedal then on again and repeat whilst keeping an eagle eye on the level of the master cylinder.

I manage to get slight feel to the pedal, but car is not driveale.

I then doubt my methods and am concerned about the amount of mess i am making and the amound of fluid i have left. I rip off the washer jet hose off my L series and put that over the nipple, its black but it will do. I then half fill a bottle with brake fluid and put hose in the fluid. Open bleed nipple and pump clutch pedal whilst keeping an eagle eye on the levels.
Still no better!

I have now been trying to bleed this clutch for the best part of 2 hours. It wasnt even that bad i was just trying to make it perfect. This bloke is comming to have a look at it tomorrow and its not working.

I have had a good search around and found others in a similar situation Like here
Most people find fitting a new master cylinder works, others replace the whole clutch system. Everyone seems to take it to a garage and they magically fix it.

I am reluctant to replace the master cylinder as it costs over £100 and i saw no problem with the last one, unless i have somehow fecked it up by taking the lid off. Likewise for other parts.

I am farely confident in my bleeding. I only stopped because i ran out of fluid and daylight.

What are peoples thoughts? Apart from that i am a grade A twonk? will it eventually bleed or shall i bite the bullet at buy a new master cylinder. Even if i buy that i shall still have to bleed it so i will be back to square 1.

I am unsure what to do next really:scratching_chin::scratching_chin:
 
Sleep on it, try again in the morning, fresh eyes and brain usually helps, sounds like you are doing it right, (if you get another baby you are pumping the wrong thing!)

It should bleed up ok, best to have another body on hand to assist.

I would be over but you probably can get someone a bit closer to help! And I got a list of jobs to do here before my next work shift!
 
Sleep on it, try again in the morning, fresh eyes and brain usually helps, sounds like you are doing it right, (if you get another baby you are pumping the wrong thing!)

It should bleed up ok, best to have another body on hand to assist.

I would be over but you probably can get someone a bit closer to help! And I got a list of jobs to do here before my next work shift!

I agree just sleep on it and crack on with it in the morning with somebody else there to assist - tireness equals mistakes.
 
I'm at work tonorrow day, I might have to put him off for a bit and try again tomorrow night. Not really what I wanted to do. I just don't get why after that long trying to bleed the results are so bad. I wasn't entirely sure why the master cylinder lid had a do not remove picture on it, I didn't know whether that would affect it at all, like whether it needed to be pressurised or somthing daft.
 
Hi,

My experience is that the piston in the master does not, by design, go all the way down. So an air lock is possible as it is like a half pushed syringe!! You can't get the air out of the last bit.

A pressurized bleed system solves this.

I think this is why it says do not remove as the master is supplied pre-filled and bled when supplied.

Good luck !
 
Hi,



My experience is that the piston in the master does not, by design, go all the way down. So an air lock is possible as it is like a half pushed syringe!! You can't get the air out of the last bit.



A pressurized bleed system solves this.



I think this is why it says do not remove as the master is supplied pre-filled and bled when supplied.



Good luck !


Makes a lot of sense, I don't know how I can pressurise it as it doesn't have a proper cap to attach to, unless I back bled it?
 
A follow up incase anyone reads this again.

Got hold of some more brake fluid and put 50p in the meter for some more daylight.
Carried on bleeding for an hour, STILL getting air out but getting through fluid fairly quickly.

Went and brought a pressure bleeder from a shop next door to screwfix. Same bleeder as this bit cheaper http://www.screwfix.com/p/gunson-eezibleed-brake-bleeding-kit-14-piece-set/33881?_requestid=311031

This bleeder gets air pressure from the spare wheel so no compressor needed as it was only £18.50! I modified it to make it be able to back bleed and connected it to the bleed nipple. I then opened the bleed nipple and watched all the air bubbles rise through the master cylinder. Also a little bit of sound deadening that fell in there even though I put a bit of cardboard up to stop it!

I made sure I put plenty of fluid through and worked the clutch and repeated. Pedal now feels a lot better, still not as good as it was I suspect it needs to settle for a day and try again but it's ok for now.

IF IT AINT BROKE DONT FIX IT!
 
I usually pressure bleed the usual way...but on some stubborn slave cylinders you have to push the piston all the way back into the cylinder...air must get trapped at the end of the piston..

So pressure bleed open the nipple and let it flow, while its doing this push the slave piston all the way back into the cylinder...push the clutch fork the other way. ..hopefully you will see huge amounts of air coming out....when it's out slowly release the piston as not to suck the bubbles back in.
 
I usually pressure bleed the usual way...but on some stubborn slave cylinders you have to push the piston all the way back into the cylinder...air must get trapped at the end of the piston..

So pressure bleed open the nipple and let it flow, while its doing this push the slave piston all the way back into the cylinder...push the clutch fork the other way. ..hopefully you will see huge amounts of air coming out....when it's out slowly release the piston as not to suck the bubbles back in.


How did you get in securing the pressure bleeder to the master cylinder? I am more used to bleeding top to bottom but lack of proper securing to the lid ment I back bled it
 
I had to make one up for the rav4 as its just a push on type..I used a bottle top and pushed it into the resoviour...then held it down with tie wraps so it did not pop off. It leaked a bit but did the job. ..I had to push the slave cylinder piston in on this one to get all the air out..

You can get universal clamp on types...but there around 40 quid just for the cap..:eek::eek:

Look something like this

3epy9uze.jpg
 
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