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Author Topic: bleeding brakes  (Read 2018 times)

Offline sharki786

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bleeding brakes
« on: 13 June 2014, 23:49 »
Fitted a new master cylinder other day. So today mad4vws decided to bleed them starting from drivers rear then pas rear then front pas then driver side then slave. Now when i press the brake pedal there is a LOUD hiss/squish noise coming from under the car. Its not leaking though. I listened in from it in the engine bay but i cant hear it from there. Its defo under the car by the about the gear shifter area.
should i rebleed the rear brakes again?
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Offline WeekendMechanic

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Re: bleeding brakes
« Reply #1 on: 14 June 2014, 09:30 »
No that is just the servo diaphragm disengaging nothing to worry about .
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Offline sharki786

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Re: bleeding brakes
« Reply #2 on: 14 June 2014, 10:10 »
You sure its nothing to worry about?
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Offline tweed

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Re: bleeding brakes
« Reply #3 on: 14 June 2014, 13:15 »
Pedal should go rock hard if the engine is not running. 

Is there a high idle when engine on?
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Offline sharki786

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Re: bleeding brakes
« Reply #4 on: 14 June 2014, 16:06 »
Ran into problem with the sh1tty mk4 rear calipers. Now mad4vws has gone to get some new copper washers. Anyway got a immobliser problem so car starts then cuts out so trying to sort that out. 1 step forward 10 steps back. Im going to torch this f*cker!!! :angry:
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Offline sharki786

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Re: bleeding brakes
« Reply #5 on: 05 July 2014, 19:05 »
Ok so now as im bored i thought id ask again. After driving the car a few miles the brakes were as sh1t as my foot slipping on wet warm sh1t!!! They only work right at the bottom and just about. Dont worry i had my hazards on and didnt drive more than 20mph lol. So anyone tell me how to go about it. I bought the ezibleed kit and that took air bubbles out but still the pedal was soft so we did it by manual and after driving they brakes only work after half way. After parking up i noticed the front pas side brake still had rust on it but drivers was clean. The rear brake disks were clean but thats only i applied the hand brake to see if that might help.
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Offline Screech16v

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Re: bleeding brakes
« Reply #6 on: 05 July 2014, 19:17 »
I would check the sliders are workin on the front calipers as a rusty disk tells me it aint doin much
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Offline sharki786

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Re: bleeding brakes
« Reply #7 on: 05 July 2014, 21:09 »
When i changed the brake disks and pads i regreased everything. I took the sliders out and made sure they moved freely. Could it be air in the caliper?
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Offline Screech16v

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Re: bleeding brakes
« Reply #8 on: 05 July 2014, 21:38 »
Should still operate as such,even with air in there,have you took the caliper off and checked the piston moves when you press the brake pedal?
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Offline sharki786

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Re: bleeding brakes
« Reply #9 on: 05 July 2014, 23:36 »
No not done that. This has only started to happen when i converted my rear calipers to the mk4 ones. I changed the master cylinder aswell. But now the brakes are even worse
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