Brake Bleeding

[Noss4atwo]

I needed to replace the rear banjo bolt/brake light wire on the master cylinder. When Bleeding the rear brake do you guys take the caliper off to raise it allowing the air to rise or am I fine leaving it attached?

 

[Bullettooth023]

Leave it attached.

 

[user_deleted]

^^^^ this. assuming you're using pedal pressure method to do bleeding you never want to activate pedal or lever with caliper detached. hell of a mess if you do.

 

[Noss4atwo]

Thanks guys. A few friends were telling me that i needed to raise the caliper or the air would not bleed out. Only allow the fluid to kinda run under the air bubble.

 

[Cosworth]

I had to replace this part last month, I attached my brake fluid bottle to the caliper bleed screw and backfed fluid to the reservoir. Worked great.

 

[user_deleted]

A few friends were telling me that i needed to raise the caliper or the air would not bleed out. Only allow the fluid to kinda run under the air bubble.

though i'm sure your friends mean well absolutely no idea what they are talking about. correct method is get yourself a sufficiently long piece of clear vinyl tubing that fits snugly over your caliper bleeder screw and feed said tubing into bottle or can. this so that you can see gunk and bubbles exiting caliper and into the tube. fill reservoir with dot 4 if available (NOT dot 5) and replace cap....now pump lever briskly. once pressure is felt open bleeder and bleed into container. repeat till pedal firm and no bubbles in tube. keep close eye on reservoir level during this process.

 

[thrstrmech]

I attached my brake fluid bottle to the caliper bleed screw and backfed fluid to the reservoir

reverse bleeding works very well...either way, you can get dirty fluid out of the system, however it's more effective than the traditional method to bleed in my opinion. using one of these or something similar makes the job easy