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Bleed nipples

544 Views 4 Replies 3 Participants Last post by  chrislovevdub
Does anyone know what the bleed nipples are for an my AUM master cylinder?

Mk4 GTI AUM
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Think you answered your own question.

Or do you mean the thread?
I know what they do I just mean I've never seen them on a master cylinder before

Mk4 GTI AUM
They are for bleeding the master cylinder. Do it as part of the normal brake bleeding process to purge any air left there. Often gets missed and is often the cause of spongey peddle
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