Bench bleed question
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
Thread Starter
Racer
Joined: Nov 2005
Posts: 340
Likes: 0
From: Dublin
the reason is was asking was I only had one of the bleeder pipes. thought the bowls were separate.
I'll wait till the kit arrives.
how does it make a difference having the cylinder off the car?
I'll wait till the kit arrives.
how does it make a difference having the cylinder off the car?
Melting Slicks
Joined: Aug 2005
Posts: 2,359
Likes: 15
From: Confusion
Only difference is it is usually a new one so easy to do it in a vise, sounds like your situation is different, no difference. Use the two tubes and pump away..............................
Race Director
Joined: Mar 2006
Posts: 14,112
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From: Florida
Here is a cut open view of a master and if you look carefully, you can see a teardrop shape of corrosion from air in front of where each seal would be.
The air will not only promote corrosion, then premature seal failure, but also give a spongy pedal.
When bench bleeding a used master, never push the pistons all the way down, use short strokes that would be less than normal useage.
Thread Starter
Racer
Joined: Nov 2005
Posts: 340
Likes: 0
From: Dublin
Because the master is tilted upward when installed it is almost impossible to get all the air out.
Here is a cut open view of a master and if you look carefully, you can see a teardrop shape of corrosion from air in front of where each seal would be.
The air will not only promote corrosion, then premature seal failure, but also give a spongy pedal.
When bench bleeding a used master, never push the pistons all the way down, use short strokes that would be less than normal useage.
Here is a cut open view of a master and if you look carefully, you can see a teardrop shape of corrosion from air in front of where each seal would be.
The air will not only promote corrosion, then premature seal failure, but also give a spongy pedal.
When bench bleeding a used master, never push the pistons all the way down, use short strokes that would be less than normal useage.
Once the cylinder is level its all the same?
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Melting Slicks
Joined: May 2009
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2024 C3 of the Year Finalist - Unmodified
Never knew that. Mounted my rebuilt MC in the car, filled it with DOT 5 silicone, used both front and rear bleeding tubes, slowly pumped with the pedal to bleed and then let it sit until all the air bubbles were gone. I guess I was lucky and accomplished the impossible. Two years later and my brakes are still solid.
Burning Brakes
Joined: Aug 2005
Posts: 801
Likes: 1
All the manuals I have read said to tilt fwd to bleed one end and tilt it back to bleed the other.I will try anything to get the air out.I still have some in my system somewhere.I put on a mastercylinder and calibers.bench bleed the cylinder and bleed a gallon of dot 5 thru it and stole have too much pedal travel.also slightly spongy pedal.It will lock up the brakes with no problem but I still don't like the feel of the pedal.might still have some air trapped some where.