|
|
|
|
| Author |
|
|
1980SCMan
Join Date: Jun 2009
Location: San Diego, CA
Posts: 398
|
No Need To Bleed Brake? Really?
Why DIDN'T I get air into the system? It doesn't seem possible.
Just replaced the front plastic gooseneck that feeds the master brake cylinder from the reservoir. It had cracked at the grommet. Replaced the grommet and the gooseneck. Hooked everything back up again, filled the reservoir and stomped on the brakes and they were firm - just like normal. In fact, while the gooseneck was leaking and draining the reservoir, the system never sucked air in. Doesn't that seem odd? |
||
09-13-2009, 01:35 PM
|
|
|
Registered
Join Date: Apr 2009
Location: Cape Vincent, NY
Posts: 841
|
No, air from the reservoir rarely gets into the cylinder provided the cylinder is not empty and the brakes applied. A leak still has fluid in the pipe so no air gets in. When you filled it if you slowly poured in the fluid you gave air in the pipe a chance to escape by not having a slug of fluid go in. The real test to know that there is no air is to repeatedly press the brakes. Of course... you may want to flush the system and put new fluid in anyway as it is hygroscopic (likes water) and water in the fluid leads to steam in the calipers which locks up the brakes. Realistically all cars are supposed to have the fluid flushed annually - no one does tho.
__________________
1968 911S "Leona" Air goes in and out, blood goes round and round, any variation on this is a bad thing. |
||
|
09-13-2009, 01:48 PM
|
|
|
Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
|
Because the reservoir and fluid is above the master cylinder piston. If allowed, any air above the piston will rise in a bubble and escape via the reservoir.
Even if installing an empty MC, moving the piston (via pedal) back and forth will allow some of the entrapped air to escape into the reservoir. Sherwood |
||
|
09-14-2009, 12:38 AM
|
|
