Coog
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On a part press of the brake pedal in the MK2 Golf I get a hissing noise and the engine idle stumbles... so I have an air leak. The hissing is coming from the seal surrounding the push rod behind the brake pedal. On full press it disappears.
I replaced the master cylinder along with pretty much all other parts of the brake system a few months back and this is the first time testing it. The servo was the original '92 part which is untested until today.
If I pump the brake pedal with engine off I get a solid pedal that'll hold.
Could a crap / poorly fitted master cylinder cause this or do we reckon it's just the diaphragm in the booster is gone? I can't think why the MC would cause it but thought I'd best check. Servo's aren't cheap to replace unfortunately.
I replaced the master cylinder along with pretty much all other parts of the brake system a few months back and this is the first time testing it. The servo was the original '92 part which is untested until today.
If I pump the brake pedal with engine off I get a solid pedal that'll hold.
Could a crap / poorly fitted master cylinder cause this or do we reckon it's just the diaphragm in the booster is gone? I can't think why the MC would cause it but thought I'd best check. Servo's aren't cheap to replace unfortunately.