racing brake fluid

[belgiumbarry]

just wondering... was looking on the rear ( think in front the same.. ) :

oil enters in the middle of the 2 pistons... bleed screw is ofcourse on top.... now i want to be sure ALL oil is replaced by new racing brake fluid... :dontknow: :dontknow: i have a vacuumpump with tank to suck oil from bleedscrew but , the oil in the lower piston ??? i don't think i can reach that ??

to do it complete i think to demount calipers so i can turn them to flush good with new oil.... mount them and do the normal procedure....

somebody done this ? :dontknow:

 

[mr. anderson]

you using DOT 5 fluid?

 

[belgiumbarry]

you using DOT 5 fluid?

no, DOT 4 with high boiling point ( 285 ° C )
DOT 5 would be perhaps a bit better but needs to be changed every year at least as it is more hydroscopic... ( taking water from atmosphere ).. think more suited for the real race cars... :dontknow:

 

[mr. anderson]

barry, that was what I was checking out. switching from any DOT 5 require a COMPLETE FLUSH of the old fluids, as mixing of DOT 5 with any of the other DOT's will cause precipitation reaction due to the differences of chemical make-up (silicone vice polyethylene glycol.)

also the fluid should cycle through the caliper, bottom to top.

 

[belgiumbarry]

barry, that was what I was checking out. switching from any DOT 5 require a COMPLETE FLUSH of the old fluids, as mixing of DOT 5 with any of the other DOT's will cause precipitation reaction due to the differences of chemical make-up (silicone vice polyethylene glycol.)

also the fluid should cycle through the caliper, bottom to top.

yes :rock: and even with the DOT 4 i want a complete refill ...what's the use of new brake fluid if the lower pistons still have "contaminated" old fluid :dontknow: .. Just think alot of garage-shops neglect that chaging oil...

 

[mr. anderson]

I hear what your sayin. brake fluid is one of the more neglected fluids on most people's vehicles. at a maximum it should be changed out every 24 months, no matter how much it is driven. if it is black then you have corrosion issues and all the calipers should be rebuilt.

 

[belgiumbarry]

I hear what your sayin. brake fluid is one of the more neglected fluids on most people's vehicles. at a maximum it should be changed out every 24 months, no matter how much it is driven. if it is black then you have corrosion issues and all the calipers should be rebuilt.

oil is still nicely brown... but i was surprized that my oil had about the looks of motor oil... New racing oil is almost water .. and blue

 

[mr. anderson]

that sounds fine. new brake fluid should be clear.(not sure about the bluish tint, what brand?)

average used brake fluid should be honey in color to tan, brown is definately time to change it out.

 

[belgiumbarry]

that sounds fine. new brake fluid should be clear.(not sure about the bluish tint, what brand?)

average used brake fluid should be honey in color to tan, brown is definately time to change it out.

must look for it , but it's called BLUE RACING BRAKE FLUID..... common here..

you're right , honey to tan... almost brown... did race it on circuit with fading after 1/2 hour.. never been the same braking afterwords.... time for a total reniew : fluid, brake pads..... :rock:

 

[mr. anderson]

Blue Racing Brake Fluid, well that would explain the blue tint then huh

a race session. that would definately get the brake fluid up to temp if not boiling.

have fun with the fluid change. which reminds me I should change mine also, nothing like and excuse for being in the garage.

 

[belgiumbarry]

Blue Racing Brake Fluid, well that would explain the blue tint then huh

a race session. that would definately get the brake fluid up to temp if not boiling.

have fun with the fluid change. which reminds me I should change mine also, nothing like and excuse for being in the garage.

that's were i found rest and piece after a day working.....just from office , change cloths and dirt my hands ...:rock: :rock: :rock: :rock: :rock:

 

[wesalbert]

A little off subject, but on my Vette I added one way brake bleeder valves. They work great. Make it an easy one man job.
Anyone here use them at all?

 

[HaroldD]

I've used speedbleeders on my rockcrawler dodge when it had stock calipers/axles. They seemed to work ok if you were doing the pumping route. I've gone to pressurized bleeding since, so it's a moot point for me now.

 

[belgiumbarry]

A little off subject, but on my Vette I added one way brake bleeder valves. They work great. Make it an easy one man job.
Anyone here use them at all?

never seen those.... :dontknow:

 

[mr. anderson]

http://www.speedbleeder.com/

 

[belgiumbarry]

http://www.speedbleeder.com/

that's nice ! :rock:

PS must be about the same size as the one way valve in my Holley to protect membrames against blowbacks ....

 

[BigRed460]

I might be wrong but dont the front calipers have 4 bleed screws? and the bak have 2? The reason being that the front are four pistion and the rear are 2?

 

[mr. anderson]

big red. the rear have one bleeder and the front have two.

 

[belgiumbarry]

big red. the rear have one bleeder and the front have two.

not on the 04's... they have floating calipers all around with 2 pistons , 1 bleeder.

Are the 05,06 calipers better ? :dontknow: anybody drove both to compare ??:dontknow:

 

[mr. anderson]

i'll take a better look when I flush the brake fluid