C5 Brakes

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rogerc5
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C5 Brakes

Post by rogerc5 »

HI folks
Just a quick one..
My garage has replaced a front Caliper, and since then the brakes feel different.
They work OK with gradual take up as usual, but I notice that having stopped the car and keeping my foot on the pedal it goes right to the floor.
I would think this is air in the system but the garage say no.
So.. should the pedal go to the floor or not??

Thanks
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GiveMeABreak
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Re: C5 Brakes

Post by GiveMeABreak »

Pop your VIN up first so we know exactly what you have.

There is a primary and secondary braking circuit and the secondary circuit needs the a diagnostic tool like Lexia to bleed the system correctly (under the ABS / ESP system menu in Lexia).

If your garage doesn't know this then that's worrying. If you don't have a Lexia yourself, you may be better off getting a dealer to bleed it properly and avoid mickey mouse outfits in future. Looks like they have allowed air in the system / or the seals in the master cylinder have inverted....
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rogerc5
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Re: C5 Brakes

Post by rogerc5 »

Thanks, The garage has been ok for several years, but only bled the one new caliper on my request
The vin is VF7**************[VIN obfuscated, can be read by forum staff]
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GiveMeABreak
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Re: C5 Brakes

Post by GiveMeABreak »

There's no such thing as bleeding one caliper - if the system has been opened, then air will have entered the braking system and it has to be properly bled for safety reasons alone.

Ok, so this is a MK I C5. What are your intentions? I can put a bleeding procedure up here - but you will still need somebody with a Lexia to bleed the secondary circuit - you have ABS with ESP on this vehicle, so won't help if you are not doing this yourself. Let me know anyway.
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rogerc5
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Re: C5 Brakes

Post by rogerc5 »

Thanks Marc
I feel vindicated!
There's another Citroen specialist nearby so I'll go there next week.
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Re: C5 Brakes

Post by Gibbo2286 »

Not Citroen but the same system.

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rogerc5
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Posts: 53
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Re: C5 Brakes

Post by rogerc5 »

That's great thanks-- I can make sure the garage follow the procedure. I thought it was just a Citroen thing.
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