bleeding breaks

[gazjones]

im changing my rear disks and pads soon, and also my car is now over 2 years old and got 18k on the clock, so brake fluid change is needed.
ive got a gunsons ezeibleed that i used to do my 312mm conversion. my question is, is this good enough to do a full fulid change on a car? and secondly how would you go about doing it, ie clear system off all fluid first them replace or just flush through with the new stuff? final question i take it you bleed the first caliper that if furthest away from master cylinder then go around working closer to the master cylinder, then go around again checking all air is out of the system?
also does anyone know of a decent dot 4 brake fluid, ive been told rbf 600 is good, how much would you need to do a change, 500ml or a ltr?

sorry for all the questions!!!
gaz

 

[F2 Stu]

Pump bleed at your peril.

But yeah go furthest away from the MC, allow 1-1.5 litres for a full change.

 

[gazjones]

i wont be pumping the pedal stu if that what you mean will be using a pressure bleeding system that works of tyre pressure. is it best to get it done at a garage and suply my own fluid?

 

[F2 Stu]

eazybleed could apply to a tube with a one way valve in it thats what I got.

but yeah what you have should be ok enougth to do the job.

 

[gazjones]

cool cheers stu have got a tube with a split in it for the old fasioned way of pumping the pedal will just atatch that to the nipple. any idea on good dot 4 fluid?

 

[F2 Stu]

decent everyday use, Castrol responce for example

 

[gazjones]

i am looking at few track day so might put some higher grade in but will look around, what do you use in yours?

 

[mgrays]

Why not Dot 5.1 .. higher boiling than Dot 4 and you can pick it up for a few pence more at most. 12 months changing of good (Girling,Castrol) Dot 5.1 is a reasonable way to do it .. alternatively there are higher boiling point fluids .. some even blue/red which helps on bleeding.

And good old pump bleeding works well enough IF you do not bleed it dry... there are variants by fast bleeding and then pressure bleeding using the pedal that will do 98% of the pedal travel of a proper factory bleed using a serious vacuum kit (I used to work for Girlings doing brake development many moons ago). The issues always are the ABS modules are never designed to bleed .. and once you get air in there... it is very hard to dislodge.. not real clever on the design!

 

[gazjones]

did my brakes today fluid wasnt to bad actually for 2 years old just put normal dot 4 in for now but might upgrade in the near future. it dot 5.1 safe to use in a dot 4 system? as i can get automec dot 5.1 from work if its ok to use

 

[ibizacupra]

Why not Dot 5.1 .. higher boiling than Dot 4 and you can pick it up for a few pence more at most. 12 months changing of good (Girling,Castrol) Dot 5.1 is a reasonable way to do it .. alternatively there are higher boiling point fluids .. some even blue/red which helps on bleeding.

Dot 5.1 higher boiling point than Dot is it?
You sure about your facts

Motul RBF600 fluid within 5'C dry boiling point of Castrol SRF (the muchos expensive race fluid used in racing) and guess what............... its a Dot4

Difference is the hygroscopic nature between them. Dot 5.1 has a slower hygroscopic take up (ability to absorb water, which drops the boiling point, hence reduces hot braking ability)

I have been thru many varied fluids including AP racing versions, ATE, Castrol Response etc etc and settled on Motul RBF600 fluid... Cure my own boiling brakes issue where no other fluid did, and did'nt break the bank using it. (£8.99/500ml+vat)

 

[mgrays]

Regular Dot 5.1 has a higher boiling point than Regular Dot 4 and even more so in 6 months (and yes you can mix them but not Dot 5 which is silicon based) .. but you can get higher boiling point Dot 4. If you want to have the best go buy the right brake fluid; then Motul looks good .. but for regular Joe wanting fluid at the weekend .. I would go for known name 5.1 .. higher spec than 4 and hence better. The complexity gets to folk when you can get a higher temp Dot 4.. but the Minimum standards for 5.1 are higher than the Minimum standards for 4. 98% of folk confused now?


So for regular non specialised use and best average boiling point get Dot 5.1 from the motor factor around the corner .. unless you are going to change fluid every 6 months or less.. or can be organised to buy some good fluid (say Motul here) .. or maybe keep car in dehumidified storage. I replace it in 12 months as it keeps the bleed nipples and piston free while you are doing a brake check plus it is cheap compared to failure/replacement parts. ..(and I do keep some cars in dehumidifed storage!)

If you want to slow down the uptake of water.. first line of defence is Stainless brake lines.. those horrible black rubber things OEM's fit should be banned!.. - water passes through them and they give lesser pedal feel.

http://www.stoptech.com/tech_info/wp_brakefluid_1a.shtml

Some Motul sales speak..
http://www.panteracars.com/motulin.html

now some salesman has come out with Dot 6 .. faster reaction time!
http://www.ate.fotocentrum.de/ATE_DownloadPDF/142506.pdf

 

[evo2345]

Do you need any special tools to get the rear calipers off?? My pads need changing really bad

 

[m0rk]

Do you need any special tools to get the rear calipers off?? My pads need changing really bad

13mm socket, 15mm open ended spanner & a calliper wind back tool

 

[danzel]

im changing my rear disks and pads soon, and also my car is now over 2 years old and got 18k on the clock, so brake fluid change is needed.
ive got a gunsons ezeibleed that i used to do my 312mm conversion. my question is, is this good enough to do a full fulid change on a car? and secondly how would you go about doing it, ie clear system off all fluid first them replace or just flush through with the new stuff? final question i take it you bleed the first caliper that if furthest away from master cylinder then go around working closer to the master cylinder, then go around again checking all air is out of the system?
also does anyone know of a decent dot 4 brake fluid, ive been told rbf 600 is good, how much would you need to do a change, 500ml or a ltr?

sorry for all the questions!!!
gaz

=========== ===============

know what.. my friend had the same trouble as yours..and i told him let the professional mechanic do fixing his car for him not to worry how to change everythin in braking system...untill now he has a high performance brakes ever that solve his problem and worry free.

 

[robertbadlad]

witch way do u wind da calliper?

 

[F2 Stu]

Clockwise.

 

[Icecavern]

witch way do u wind da calliper?

Clockwise jus like da homeboy sez

 

[gazjones]

yep clockwise and needs to be pushed in at same time takes about 6 full turns maybe few more cant quite remember

 

[andyj]

get a windback tool from Halfrauds for about £8