My brakes seemed a little spongy so took them all apart, looked like it was leaking inbetween the master cylinder and servo. There is a space on the master cylinder for a gasket which means I've lost it probably.
The question is... Is it a gasket or a rubber O-Ring and where can I buy one?
Rich.
Master Cylinder - Gasket or O-Ring?
Forum rules
Hints, tips and guides for repair and modification - the FAQ section on the main website is worth checking first for information relating to common faults and technical help. Useful posts and guides will be added to the FAQ http://www.sciroccoregister.co.uk/scirocco-faq
Hints, tips and guides for repair and modification - the FAQ section on the main website is worth checking first for information relating to common faults and technical help. Useful posts and guides will be added to the FAQ http://www.sciroccoregister.co.uk/scirocco-faq
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Ryan
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Re: Master Cylinder - Gasket or O-Ring?
I seem to remember a gasket on mine.
Rectangular, but rounded at one end.
Don't know where you'd get one - VW?
Rectangular, but rounded at one end.
Don't know where you'd get one - VW?
Octavia elegance kombi TDI
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Nate
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Re: Master Cylinder - Gasket or O-Ring?
surely a gasket between m/cylinder and servo would just be to keep dirt out? fluid should never be by there. this would point more towards the seals inside the master cylinder?
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MrP
Re: Master Cylinder - Gasket or O-Ring?
Doubt it, It was a new sevo and has only been used for about 10 miles, plus I think it was leaking vacuum from there.. Would that affect the braking?Nate wrote:surely a gasket between m/cylinder and servo would just be to keep dirt out? fluid should never be by there. this would point more towards the seals inside the master cylinder?
Rich
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Nate
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Re: Master Cylinder - Gasket or O-Ring?
sorry - i presumed you meant leaking brake fluid.
a vacuum leak would cause the pedal to become much harder to press - you would be getting less assistance.
sponginess is caused by air in the brake lines, old brake fluid, leaking seals, hoses bulging under pressure.
check the colour of your fluid, if it's going brown or it hasn't been changed in the last 2 years, change it. make sure you've got all the air bled out of the system.
examine all of your flexi hoses. check for any signs of them cracking. get an assistant to stand on the pedal while you hold the hose. see if it inflates lots. if you find either of them, change them (good time to put a set of goodridge braded hoses on, they're near enuf the same prices as vw rubber ones.)
check the wheel cylinders for any signs of leaking - take the drums off and pull back the rubber cover to look for any fluid. make sure you put the covers back on properly though. check for any other fluid leaks - caliper piston seals or master cylinder. if there's paint round the master cylinder that has recently gone weird, it's usually a sign that it's had brake fluid on it.
when you've done all that, adjust up the rear brakes. with the drum on pull the adjuster wedge down as hard as you can with a pokey tool through one of the bolt holes while your assistant stands on the brake pedal nice and hard. this done both sides should give you a hand brake that is fully applied in 2 clicks
a vacuum leak would cause the pedal to become much harder to press - you would be getting less assistance.
sponginess is caused by air in the brake lines, old brake fluid, leaking seals, hoses bulging under pressure.
check the colour of your fluid, if it's going brown or it hasn't been changed in the last 2 years, change it. make sure you've got all the air bled out of the system.
examine all of your flexi hoses. check for any signs of them cracking. get an assistant to stand on the pedal while you hold the hose. see if it inflates lots. if you find either of them, change them (good time to put a set of goodridge braded hoses on, they're near enuf the same prices as vw rubber ones.)
check the wheel cylinders for any signs of leaking - take the drums off and pull back the rubber cover to look for any fluid. make sure you put the covers back on properly though. check for any other fluid leaks - caliper piston seals or master cylinder. if there's paint round the master cylinder that has recently gone weird, it's usually a sign that it's had brake fluid on it.
when you've done all that, adjust up the rear brakes. with the drum on pull the adjuster wedge down as hard as you can with a pokey tool through one of the bolt holes while your assistant stands on the brake pedal nice and hard. this done both sides should give you a hand brake that is fully applied in 2 clicks