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Hypothetical brake bleeding question

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Old 05-22-2006, 10:08 AM
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Default Hypothetical brake bleeding question
If you were pressure bleeding your brakes and the plastic bottle blew off the master cylinder, that means you'd need a whole new assy, right?
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Old 05-22-2006, 11:01 AM
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Default IIRC the brake fluid reservior is only held on to the master cyl by a friction fit
The reservoir has o-ring seals and it just pushes onto the top of the master cyl. You should be able to push it back on or just replace the o-rings. I've never had a problem pressure bleading, but I never go over 25 psi. At what pressure did the blow off hypothetically happen?
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Old 05-22-2006, 11:38 AM
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Default correct, it fits back on there
sometimes if the hose from the pressure bleeder can push or pull the resivoir off the mastercylinder. Re-attach and re-bleed.
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Old 05-22-2006, 11:56 AM
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Didn't happen to me, I heard it happened to a B5 A4. I pressure bleed @ 15psi.
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Old 05-22-2006, 03:38 PM
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Only if it cracked in the process
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Old 05-22-2006, 04:00 PM
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Default No, all reserviors are pressed into the cylinder via o-rings and are gravity fed.
You'll just need to re-bleed everything.
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Old 05-23-2006, 06:13 AM
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hypothetically this could only happen on a '92, thanks to the strut bars on later cars
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Old 05-23-2006, 08:07 AM
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Default There is still enough play for the bottle to pop up and spring a leak.
I'm just asking so I can be prepared for all contingencies.
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