sudden loss of brake pedal pressure at stop
09-30-2016, 06:53 PM
#16
Chronic Tool Dropper
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For other cars, ATE has been very specific about the need for the bench bleeding, with the master cylinder level. Particularly they demand it for anything with a two-piece piston.
The ATE kit has tiny clear plastic hoses, so no issues getting the ends of the hoses "around the corner" to get the ends into the liquid. If you can't get your return lines into the fluid, just take care in your procedure to let any bubbles rise to the top of the reservoir before you push the piston again.
I'm sure that Stan's method works fine virtually all the time. In my perverse interpretation of probability, "virtually all the time" is the same as "never" if I need to add a step to guarantee that the system works perfectly every time. Stan has undoubtedly placed hands on a lot more 928's than I have, so I bow to his experience. His method also includes a recovery path as the system is flushed and bled following the MC replacement. ATE's method doesn't require that, as it's targeted at techs who are "just" replacing the MC without assuming any other procedures required like flush or bleed.
After investing a good amount of time getting some fugitive air out of my brake hydraulics, I'm on board with taking every available action to prevent introduction of air back into the system.
The ATE kit has tiny clear plastic hoses, so no issues getting the ends of the hoses "around the corner" to get the ends into the liquid. If you can't get your return lines into the fluid, just take care in your procedure to let any bubbles rise to the top of the reservoir before you push the piston again.
I'm sure that Stan's method works fine virtually all the time. In my perverse interpretation of probability, "virtually all the time" is the same as "never" if I need to add a step to guarantee that the system works perfectly every time. Stan has undoubtedly placed hands on a lot more 928's than I have, so I bow to his experience. His method also includes a recovery path as the system is flushed and bled following the MC replacement. ATE's method doesn't require that, as it's targeted at techs who are "just" replacing the MC without assuming any other procedures required like flush or bleed.
After investing a good amount of time getting some fugitive air out of my brake hydraulics, I'm on board with taking every available action to prevent introduction of air back into the system.
