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Old 12-29-2014, 04:12 PM   #1
SideVinder650
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Bleeder Nipple Operation; brakes (vs. speed bleeders)

Hey guys,

Quick question regarding the bleeder nipple while bleeding brakes. My apologies in advance if this gets confusing but i am a little confused here:

So, when you're bleeding brakes, or upgrading to stainless lines or anything like that, and require to add or bleed fluid...

Is it NOT a good idea to simply crack the (OEM) bleeder nipple open, (with tubing running to a catch can) and just pump and pump and pump until all air is released?

Im not quite understanding what the difference is here between a speed bleeder and a regular bleeder. I get that the speed bleeder supposedly doesnt let air back into the system but if you've routed your hoses correctly and maintain a somewhat full level of fluid in your reservoir shouldnt you be able to freely leave the bleeder valve open and continually pump fluid out of the system to flush any old fluid/air out?

I under stand part of the reasoning behind the pump/crack/close method, (to pump up pressure so the air is forced out right?) but im still not convinced that a speed bleeder is even necessary if you follow the same method of leaving the bleeder open while being careful to make sure your hose doesnt draw the fluid back in along with air, nor let your reservoir run out of fluid and suck air in that way.

So long as I dont suck air in from the reservoir or draw air/fluid back in thru the hose, shouldnt I be able to crack open the bleeder nipple and pump it until all old fluid/air is flushed out of the system? (one caliper at a time, until all calipers are completed, whether this be on a motorcycle, car, truck, atv., whatever... right?)

Just curious here, because if this is the case, and I just be extra careful im not going to worry about speed bleeders. I often find that with some patience and organization my brake bleed jobs (with OEM setup) arent all that hard anyways. Just wanting to make sure.
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Old 12-29-2014, 04:22 PM   #2
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well give it a shot and see what happens. Personally an air bleeder is 20 bux at Harbor freight. I just suck it all out with the air bleeder then finish it off old school.
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Old 12-29-2014, 04:49 PM   #3
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it will suck air around the bleeder threads.
In fact that sometimes makes it hard to tell when you've gotten the air out of the system. You keep seeing bubbles in the hose. In that case you have to go only on brake lever feel.
If it's solid, you're done.

There really is a reason everybody always says pump, crack, close, pump... repeat
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Old 12-29-2014, 05:06 PM   #4
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two bleeder valves, the holy terror in THAT job.

Not like you are doing a 1979 El Dorado by yourself
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Old 12-31-2014, 12:26 AM   #5
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5mins vs sometimes up to a hour without an air bleeder. i like finishing the job as quickly as possible. a cheaper alternative would be using a syringe/hose and injecting fluid backwards from the caliper bleeder, then bleed it manually.

when you say speedbleeder, i think of speedbleeder nipples with the 1 way valves built in.
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Old 12-31-2014, 12:42 AM   #6
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Quote:
Originally Posted by buddha429 View Post
5mins vs sometimes up to a hour without an air bleeder. i like finishing the job as quickly as possible. a cheaper alternative would be using a syringe/hose and injecting fluid backwards from the caliper bleeder, then bleed it manually.

when you say speedbleeder, i think of speedbleeder nipples with the 1 way valves built in.

+1 for the syringe and hose. Air travels up, not down.
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Old 12-31-2014, 11:26 AM   #7
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Actually im upgrading my cage's brake lines to stainless steel so this is for 4 calipers, but us bikie's tend to be more versed in the nuances of brake bleeding since we (should?) be checking it more often and what not,

i figured i'd ask if there was any danger with trying to use the OEM bleeder nipples as tho they were speed bleeders (leaving them open and pumping air straight out without re-closing) so long as im careful not to let air run back into the system.

I appreciate the suggestions i may just do it the old fashioned way if i can find a helper it really doesnt take too long and the piece of mind will be worthwhile i was just curious if anyone was successfully doing it a different way that was faster and as or more reliable.
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