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Brakes/Hubs Brakes, Hubs, and etc

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post #6 of 17 (permalink) Old 9th May 2009 Thread Starter
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Spongy Brakes

Yip have changed pads on a (rover) 200 before but never had to bleed brakes in the past, plus this one is all round disc, had it out yesterday, brakes ok if doing 50 or under, and plenty of time to stop, but in the event of some-one or thing requiring you to stop suddenly, then I am wondering if they will perform,seems that when I apply the brakes the pedal goes to the floor not without a bit of pressure, but it feels like they aren`t stopping quick enough, and that is with the pedal to the floor.
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post #7 of 17 (permalink) Old 9th May 2009
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Common complaint on the RX4

Mine was like it from new, the pedal would go to the stop relatively easily. From cold, they didn't feel right at all, but at speed it did seem to pull up relatively well, but it was a bit unnerving having the pedal on the floor
post #8 of 17 (permalink) Old 9th May 2009 Thread Starter
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Talking Spongy Brakes

Even when the pedal is to the floor it feels like I`m trying to push it further to get the brakes to work harder, if I could get some pics on how to bleed then I would get down there and give it a go, but would bleeding the brakes cure the dilema. Just finished giving it a full wax and polish inside and out , at least it looks good. lol.
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post #9 of 17 (permalink) Old 9th May 2009
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Just some thoughts -

Sounds like a leak from the master cylinder to me.

In the engine bay:
check the pipes immediately connected to the master cylinder for damage/corrosion and the master cylinder itself for damage, then trace the brake pipes back from there. Also check the flexi pipes at each wheel, any leakage here should be easy to spot in dry conditions.

If you find that the brake pipes show a lot of corrosion in general it may be prudent to have all the pipes renewed, it's not as expensive as you may think for such a large job and you get piece of mind.

I personally wouldn't recommend any DIY tinkerer try bleeding brakes unless helped by someone who explicitly knows what they are doing. Too risky otherwise.

If you decide to take it to a garage it needn't be renault as any garage worth their salt should be able to sort it, defo worth getting a few quotes first.

This happened to me (spongy for 2 mins; then no brakes whatsoever!!!)
It was a brake pipe routed through the interior that had a pinhole in it, resulting in a cloud of brake fluid that looked like smoke.

Glad the handbrake worked fine LOL.

I had the help of my father and we replaced the whole lot as it was an old mini (my first car) it needed done, we have since done a couple of my cars over the years and it never gets any harder or easier, just different cars.
It IS an exact science though, I'm now in my 30s and still wouldn't do it without help. This is one of only a tiny handful of jobs that I wouldn't attempt without knowledgeable practical help.
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post #10 of 17 (permalink) Old 9th May 2009
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How long since the last brake fluid change? For the first time yesterday I read the following in the service book for the Passat....

WARNING: Brake fluid service must be carried out every 2 years. If the brake fluid is left in the system for too long, heavy use of the brakes may cause a vapour lock. THIS COULD CAUSE THE BRAKES TO FAIL.

Is this just VW scaremongering, or is this a real possibility? If it is, then this might be what you have experienced.

Why do today what you can put off until tomorrow...

Wanna see what I drive? No pics of the latest Passat, but you can see the Scenic II here and the CB1000R here!

Previous Passat here and Bandit here.
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brakes , spongy

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