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brake bleeding
blakep82 - 14/12/09 at 10:50 PM

never really given the process much thought, but saw in halfords the other week, a one way valve thngy in the bike section. you unscrew the bleed screw, attach the valve with plastic pipe, and pump the brakes until fluid comes out (but it won't go back because of the valve)

its probably a well known way to do it, buti've never seen this for a car before. seems like the easiest way to do it. the bike one is quite expensive and you only get 1 valve.

any similar car kits anywhere? or a similar 1 way valve whicxh could be used? thinking about £10 for 4 valves? or even 2 valves

[Edited on 14/12/09 by blakep82]


clairetoo - 14/12/09 at 10:55 PM

I do it the locost way - just plug the end of the pipe , and put a small cut along it , pressure will open the slit but vacuum will close it .
Cost for 4 ? Just four lengths of tube............


Danozeman - 14/12/09 at 10:55 PM

You can do it with a screw in the end of a bit of washer pipe with a slit in it. works the same and much cheapness.

[Edited on 14/12/09 by Danozeman]


blakep82 - 14/12/09 at 10:56 PM

ah cool ^
hadn't thought of something like that


Peteff - 14/12/09 at 11:58 PM

Put some fluid in a jar and find something to hang it on then put the slit end of your bleed tube in the fluid so you can see the bubbles and it can only draw fluid back in not air. The pipe has to be rubber, plastic will not close back up tight enough.

[Edited on 14/12/09 by Peteff]


dhutch - 15/12/09 at 12:14 AM

You can still end up with some air geting back in tho the threads of the bleed nipple too ive heard.
- I dont know, although for £12 with a tradecard you can get the bleed kit the presurises the header with the presure of a spare tyre and pushes the fluid through. Works a treat for me.

I do like the plugged and cut pipe idea tho. Very neet.


Daniel


02GF74 - 15/12/09 at 07:48 AM

Save your £ 10 and spend it on ciggies and beer.

Make your own one way valve, either as above, or more fancy version solder up one end of a short length of brake pipe with a hole in the side. Fit on end of a plastic hose and slip a short length of hose over the hole.


t16turbotone - 15/12/09 at 07:53 AM

i always let gravitiy do the work, just open the nipples and wait, as long as the master cylinder is at highest point it will come through nicely


britishtrident - 15/12/09 at 07:58 AM

quote:
Originally posted by t16turbotone
i always let gravitiy do the work, just open the nipples and wait, as long as the master cylinder is at highest point it will come through nicely



Simply not true.


britishtrident - 15/12/09 at 08:02 AM

One way valves can cause more problems than they solve particularly with some makes of mastercylinder.

For occaisional DIYer working alone the Eezibleed is the most cost effective solution.

However even using the Eezibleed the peddle should be give a couple of pumps to clear trapped air from the master cylinder.


Findlay234 - 15/12/09 at 09:10 AM

Again... agreed with britishtrident....

The pressure bleed kit is definately the easiest method to use. If im starting from scratch with a new system ill use the one way valve to start it off and fill the mcyl with a few pumps and use the easy bleed to quickly bleed from there. Then for each subsequent bleed of fresh fluid when you service the car you can just use the easybleed for a 5min job.

Tried the split tube method and it does work but no where near as well as a 5 quid proper valve that I got. The one ive got is almost as easy to do as the easy bleed... just a bit more walking around the car.


boggle - 15/12/09 at 07:26 PM

i use the easy bleed...its great for checking all your other brake components whilst the system is under preasure..