Quote:
Originally Posted by gastropodus
I've read elsewhere in the forums that brake hoses are multiple layer, and that the inner layer can break down. This can have the effect of creating a "one-way valve" where your foot pressure pushes fluid to the caliper, but then the inner layer collapses against itself trapping pressure on the caliper side of the hose defect.
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The one way valve effect is certainly a real possibility. But I don't see how it would cause the typical brake squeal.