C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Speed Bleeders

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Old Nov 18, 2020 | 07:22 PM
  #41  
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Originally Posted by aklim
If you pump, I think that when you release the pedal, it might suck air into the system.
It the hose is immersed in fluid and no air is remaining in the hose...how will air enter the hose to get sucked into the system?
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Old Nov 18, 2020 | 07:24 PM
  #42  
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Originally Posted by Nomake Wan
It the hose is immersed in fluid and no air is remaining in the hose...how will air enter the hose to get sucked into the system?
So if you connect the hose on one end and immerse it on the other, can you suck up old, expelled fluid from the jar? Unless you do the "Open, Down, Close, Up" routine. That is.

Last edited by aklim; Nov 18, 2020 at 07:28 PM.
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Old Nov 18, 2020 | 07:32 PM
  #43  
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Originally Posted by Nomake Wan
It the hose is immersed in fluid and no air is remaining in the hose...how will air enter the hose to get sucked into the system?
Very good point.
Thanks Hawkeye56
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Old Nov 18, 2020 | 07:35 PM
  #44  
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Originally Posted by aklim
So if you connect the hose on one end and immerse it on the other, can you suck up old, expelled fluid from the jar? Unless you do the "Open, Down, Close, Up" routine. That is.
Absolutely; but this is why the length of the clear hose is also important. Have a long enough hose and the 'bad' fluid won't make it all the way back into the caliper.

Still faster and easier to use a speed bleeder or a power bleeder tho.
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Old Nov 18, 2020 | 07:57 PM
  #45  
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Originally Posted by aklim
If you pump, I think that when you release the pedal, it might suck air into the system.
Covered that back in post #15, right here:

Originally Posted by Tom400CFI
Wait...WHUT? That's right, you can open a bleeder or several and pump the pedal by yourself (no helper). Yes you'll draw some air back into the caliper on each pedal release, but over all, it's a net gain and you're moving fluid from the res, down and out the calipers....fast. When you're done pumping, there will be some air drawn into the calipers on your last pedal release...that's O.K. Wait about 20 second or so and the caliper will have filled and be bled out. Easy.

Originally Posted by Nomake Wan
Still faster and easier to use a speed bleeder or a power bleeder tho.
You think? You're saying you can hook up, operate a power bleeder and bleed the brakes and be done in <10-15 minutes?


.

Last edited by Tom400CFI; Nov 18, 2020 at 08:04 PM.
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Old Nov 18, 2020 | 08:04 PM
  #46  
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Originally Posted by cv67
Tom if you do the gravity method and use a clear hose..if theres no air left and (immersed in a jar of fluid) will pumping it help things along? With my luck Id still somehow get air in there.
I don't even bother with the pedal pump unless:
1. I'm starting with a completely empty system. Pumping will fill and bleed the whole system from the res to the caliper in seconds.
2. If I'm dealing with an older/crudded up brake system (mostly the trucks at work), often times one or more calipers won't gravity bleed....or they WILL, but they flow super slow. That is typically b/c of some smeg in a line, hose, port, somewhere. In that case, I close all the bleeders but the slow flowing one, then pump the pedal a couple times. This blasts whatever smeg is slowing things down right on through and typically I get great flow after that.

....then I finish off by Gravity letting that caliper fill/bleed -which usually only takes seconds, and then that one is done.
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Old Nov 18, 2020 | 08:14 PM
  #47  
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Originally Posted by Tom400CFI
You think? You're saying you can hook up, operate a power bleeder and bleed the brakes and be done in <10-15 minutes?
Me personally? Probably not. The majority of the time it takes to bleed for me is just getting the hose onto the bleeder screw and making sure the bottle at the other end of the hose is somewhere it won't fall over and make a mess. And I'm sure the first time I used the power bleeder, it would easily take me over 15 minutes just to double-check myself that I got the operation correct as I have zero experience with them personally.

But if I were doing it constantly? Or a shop that just has it on tap? Yeah probably. For now, I've got speed bleeders on, they do what they say on the tin and haven't leaked. YMMV.
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